iio: adc: Replace license text w/ SPDX identifier
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Message ID 20181128175312.9634-1-matheus.bernardino@usp.br
State Not Applicable, archived
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Series
  • iio: adc: Replace license text w/ SPDX identifier
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Commit Message

Matheus Tavares Bernardino Nov. 28, 2018, 5:53 p.m. UTC
From: Lucas Santos <ilucas.ms@gmail.com>

This patch removes all license boilerplate texts from the .c and .h
files at drivers/iio/adc/ and, instead, adds the proper SPDX license
identifiers.

Signed-off-by: Lucas Santos <ilucas.ms@gmail.com>
Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
---
 drivers/iio/adc/ad7266.c             |  3 +--
 drivers/iio/adc/ad7291.c             |  3 +--
 drivers/iio/adc/ad7298.c             |  3 +--
 drivers/iio/adc/ad7766.c             |  3 +--
 drivers/iio/adc/ad7791.c             |  3 +--
 drivers/iio/adc/ad7793.c             |  3 +--
 drivers/iio/adc/ad7887.c             |  3 +--
 drivers/iio/adc/ad7923.c             |  3 +--
 drivers/iio/adc/ad799x.c             |  5 +----
 drivers/iio/adc/ad_sigma_delta.c     |  3 +--
 drivers/iio/adc/aspeed_adc.c         |  6 +-----
 drivers/iio/adc/at91-sama5d2_adc.c   | 10 +---------
 drivers/iio/adc/at91_adc.c           |  3 +--
 drivers/iio/adc/axp20x_adc.c         |  5 +----
 drivers/iio/adc/axp288_adc.c         | 13 +------------
 drivers/iio/adc/bcm_iproc_adc.c      | 13 +------------
 drivers/iio/adc/berlin2-adc.c        |  5 +----
 drivers/iio/adc/cc10001_adc.c        |  6 +-----
 drivers/iio/adc/cpcap-adc.c          | 10 +---------
 drivers/iio/adc/da9150-gpadc.c       |  6 +-----
 drivers/iio/adc/dln2-adc.c           |  5 +----
 drivers/iio/adc/ep93xx_adc.c         |  5 +----
 drivers/iio/adc/exynos_adc.c         | 11 +----------
 drivers/iio/adc/fsl-imx25-gcq.c      |  5 +----
 drivers/iio/adc/hi8435.c             |  6 +-----
 drivers/iio/adc/hx711.c              |  6 +-----
 drivers/iio/adc/imx7d_adc.c          |  6 +-----
 drivers/iio/adc/ina2xx-adc.c         |  7 +------
 drivers/iio/adc/lp8788_adc.c         |  5 +----
 drivers/iio/adc/lpc18xx_adc.c        |  5 +----
 drivers/iio/adc/lpc32xx_adc.c        | 15 +--------------
 drivers/iio/adc/ltc2471.c            |  3 +--
 drivers/iio/adc/ltc2485.c            |  5 +----
 drivers/iio/adc/ltc2497.c            |  3 +--
 drivers/iio/adc/max1027.c            |  5 +----
 drivers/iio/adc/max1118.c            |  5 +----
 drivers/iio/adc/max1363.c            |  5 +----
 drivers/iio/adc/mcp320x.c            |  5 +----
 drivers/iio/adc/mcp3422.c            |  6 +-----
 drivers/iio/adc/men_z188_adc.c       |  5 +----
 drivers/iio/adc/meson_saradc.c       |  5 +----
 drivers/iio/adc/mt6577_auxadc.c      | 10 +---------
 drivers/iio/adc/mxs-lradc-adc.c      | 11 +----------
 drivers/iio/adc/nau7802.c            |  3 +--
 drivers/iio/adc/palmas_gpadc.c       |  5 +----
 drivers/iio/adc/qcom-pm8xxx-xoadc.c  |  1 +
 drivers/iio/adc/qcom-spmi-iadc.c     | 10 +---------
 drivers/iio/adc/qcom-spmi-vadc.c     | 10 +---------
 drivers/iio/adc/rockchip_saradc.c    | 11 +----------
 drivers/iio/adc/spear_adc.c          |  3 +--
 drivers/iio/adc/stx104.c             | 10 +---------
 drivers/iio/adc/sun4i-gpadc-iio.c    |  5 +----
 drivers/iio/adc/ti-adc081c.c         |  5 +----
 drivers/iio/adc/ti-adc0832.c         |  5 +----
 drivers/iio/adc/ti-adc084s021.c      |  5 +----
 drivers/iio/adc/ti-adc108s102.c      | 10 +---------
 drivers/iio/adc/ti-adc12138.c        |  5 +----
 drivers/iio/adc/ti-ads1015.c         |  5 +----
 drivers/iio/adc/ti-ads8688.c         |  5 +----
 drivers/iio/adc/ti-tlc4541.c         |  5 +----
 drivers/iio/adc/ti_am335x_adc.c      | 10 +---------
 drivers/iio/adc/twl4030-madc.c       | 16 +---------------
 drivers/iio/adc/twl6030-gpadc.c      | 16 +---------------
 drivers/iio/adc/vf610_adc.c          | 15 +--------------
 drivers/iio/adc/viperboard_adc.c     |  7 +------
 drivers/iio/adc/xilinx-xadc-core.c   |  3 +--
 drivers/iio/adc/xilinx-xadc-events.c |  3 +--
 drivers/iio/adc/xilinx-xadc.h        |  3 +--
 68 files changed, 68 insertions(+), 361 deletions(-)

Comments

Scott Branden Nov. 28, 2018, 6:54 p.m. UTC | #1
On 2018-11-28 9:53 a.m., Matheus Tavares wrote:
> From: Lucas Santos <ilucas.ms@gmail.com>
>
> This patch removes all license boilerplate texts from the .c and .h

I know other people don't follow the patch guidelines,
<https://www.kernel.org/doc/html/latest/process/submitting-patches.html>

but more info on proper commit message format in link. 
<https://www.kernel.org/doc/html/latest/process/submitting-patches.html>

(Don't say "this patch" or "this commit" or "I changed") - use 
imperative present tense. 
<https://www.kernel.org/doc/html/latest/process/submitting-patches.html>

https://www.kernel.org/doc/html/latest/process/submitting-patches.html

> files at drivers/iio/adc/ and, instead, adds the proper SPDX license
> identifiers.
>
> Signed-off-by: Lucas Santos <ilucas.ms@gmail.com>
> Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
> ---
>   drivers/iio/adc/ad7266.c             |  3 +--
>   drivers/iio/adc/ad7291.c             |  3 +--
>   drivers/iio/adc/ad7298.c             |  3 +--
>   drivers/iio/adc/ad7766.c             |  3 +--
>   drivers/iio/adc/ad7791.c             |  3 +--
>   drivers/iio/adc/ad7793.c             |  3 +--
>   drivers/iio/adc/ad7887.c             |  3 +--
>   drivers/iio/adc/ad7923.c             |  3 +--
>   drivers/iio/adc/ad799x.c             |  5 +----
>   drivers/iio/adc/ad_sigma_delta.c     |  3 +--
>   drivers/iio/adc/aspeed_adc.c         |  6 +-----
>   drivers/iio/adc/at91-sama5d2_adc.c   | 10 +---------
>   drivers/iio/adc/at91_adc.c           |  3 +--
>   drivers/iio/adc/axp20x_adc.c         |  5 +----
>   drivers/iio/adc/axp288_adc.c         | 13 +------------
>   drivers/iio/adc/bcm_iproc_adc.c      | 13 +------------

Broadcom change:

Acked-by: Scott Branden <scott.branden@broadcom.com>

>   drivers/iio/adc/berlin2-adc.c        |  5 +----
>   drivers/iio/adc/cc10001_adc.c        |  6 +-----
>   drivers/iio/adc/cpcap-adc.c          | 10 +---------
>   drivers/iio/adc/da9150-gpadc.c       |  6 +-----
>   drivers/iio/adc/dln2-adc.c           |  5 +----
>   drivers/iio/adc/ep93xx_adc.c         |  5 +----
>   drivers/iio/adc/exynos_adc.c         | 11 +----------
>   drivers/iio/adc/fsl-imx25-gcq.c      |  5 +----
>   drivers/iio/adc/hi8435.c             |  6 +-----
>   drivers/iio/adc/hx711.c              |  6 +-----
>   drivers/iio/adc/imx7d_adc.c          |  6 +-----
>   drivers/iio/adc/ina2xx-adc.c         |  7 +------
>   drivers/iio/adc/lp8788_adc.c         |  5 +----
>   drivers/iio/adc/lpc18xx_adc.c        |  5 +----
>   drivers/iio/adc/lpc32xx_adc.c        | 15 +--------------
>   drivers/iio/adc/ltc2471.c            |  3 +--
>   drivers/iio/adc/ltc2485.c            |  5 +----
>   drivers/iio/adc/ltc2497.c            |  3 +--
>   drivers/iio/adc/max1027.c            |  5 +----
>   drivers/iio/adc/max1118.c            |  5 +----
>   drivers/iio/adc/max1363.c            |  5 +----
>   drivers/iio/adc/mcp320x.c            |  5 +----
>   drivers/iio/adc/mcp3422.c            |  6 +-----
>   drivers/iio/adc/men_z188_adc.c       |  5 +----
>   drivers/iio/adc/meson_saradc.c       |  5 +----
>   drivers/iio/adc/mt6577_auxadc.c      | 10 +---------
>   drivers/iio/adc/mxs-lradc-adc.c      | 11 +----------
>   drivers/iio/adc/nau7802.c            |  3 +--
>   drivers/iio/adc/palmas_gpadc.c       |  5 +----
>   drivers/iio/adc/qcom-pm8xxx-xoadc.c  |  1 +
>   drivers/iio/adc/qcom-spmi-iadc.c     | 10 +---------
>   drivers/iio/adc/qcom-spmi-vadc.c     | 10 +---------
>   drivers/iio/adc/rockchip_saradc.c    | 11 +----------
>   drivers/iio/adc/spear_adc.c          |  3 +--
>   drivers/iio/adc/stx104.c             | 10 +---------
>   drivers/iio/adc/sun4i-gpadc-iio.c    |  5 +----
>   drivers/iio/adc/ti-adc081c.c         |  5 +----
>   drivers/iio/adc/ti-adc0832.c         |  5 +----
>   drivers/iio/adc/ti-adc084s021.c      |  5 +----
>   drivers/iio/adc/ti-adc108s102.c      | 10 +---------
>   drivers/iio/adc/ti-adc12138.c        |  5 +----
>   drivers/iio/adc/ti-ads1015.c         |  5 +----
>   drivers/iio/adc/ti-ads8688.c         |  5 +----
>   drivers/iio/adc/ti-tlc4541.c         |  5 +----
>   drivers/iio/adc/ti_am335x_adc.c      | 10 +---------
>   drivers/iio/adc/twl4030-madc.c       | 16 +---------------
>   drivers/iio/adc/twl6030-gpadc.c      | 16 +---------------
>   drivers/iio/adc/vf610_adc.c          | 15 +--------------
>   drivers/iio/adc/viperboard_adc.c     |  7 +------
>   drivers/iio/adc/xilinx-xadc-core.c   |  3 +--
>   drivers/iio/adc/xilinx-xadc-events.c |  3 +--
>   drivers/iio/adc/xilinx-xadc.h        |  3 +--
>   68 files changed, 68 insertions(+), 361 deletions(-)
>
> diff --git a/drivers/iio/adc/ad7266.c b/drivers/iio/adc/ad7266.c
> index 605eb5e7e829..b538824e76cd 100644
> --- a/drivers/iio/adc/ad7266.c
> +++ b/drivers/iio/adc/ad7266.c
> @@ -1,9 +1,8 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * AD7266/65 SPI ADC driver
>    *
>    * Copyright 2012 Analog Devices Inc.
> - *
> - * Licensed under the GPL-2.
>    */
>   
>   #include <linux/device.h>
> diff --git a/drivers/iio/adc/ad7291.c b/drivers/iio/adc/ad7291.c
> index a862b5d8fb4b..7bc9f2e8cd3c 100644
> --- a/drivers/iio/adc/ad7291.c
> +++ b/drivers/iio/adc/ad7291.c
> @@ -1,9 +1,8 @@
> +// SPDX-License-Identifier: GPL-2.0+
>   /*
>    * AD7291 8-Channel, I2C, 12-Bit SAR ADC with Temperature Sensor
>    *
>    * Copyright 2010-2011 Analog Devices Inc.
> - *
> - * Licensed under the GPL-2 or later.
>    */
>   
>   #include <linux/device.h>
> diff --git a/drivers/iio/adc/ad7298.c b/drivers/iio/adc/ad7298.c
> index e0220825fde0..e7ba5e29d0d6 100644
> --- a/drivers/iio/adc/ad7298.c
> +++ b/drivers/iio/adc/ad7298.c
> @@ -1,9 +1,8 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * AD7298 SPI ADC driver
>    *
>    * Copyright 2011 Analog Devices Inc.
> - *
> - * Licensed under the GPL-2.
>    */
>   
>   #include <linux/device.h>
> diff --git a/drivers/iio/adc/ad7766.c b/drivers/iio/adc/ad7766.c
> index 3ae14fc8c649..ff14959f55de 100644
> --- a/drivers/iio/adc/ad7766.c
> +++ b/drivers/iio/adc/ad7766.c
> @@ -1,9 +1,8 @@
> +// SPDX-License-Identifier: GPL-2.0+
>   /*
>    * AD7766/AD7767 SPI ADC driver
>    *
>    * Copyright 2016 Analog Devices Inc.
> - *
> - * Licensed under the GPL-2 or later.
>    */
>   
>   #include <linux/clk.h>
> diff --git a/drivers/iio/adc/ad7791.c b/drivers/iio/adc/ad7791.c
> index a9ff0695ddf7..1b9ab2ef9bae 100644
> --- a/drivers/iio/adc/ad7791.c
> +++ b/drivers/iio/adc/ad7791.c
> @@ -1,10 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * AD7787/AD7788/AD7789/AD7790/AD7791 SPI ADC driver
>    *
>    * Copyright 2012 Analog Devices Inc.
>    *  Author: Lars-Peter Clausen <lars@metafoo.de>
> - *
> - * Licensed under the GPL-2.
>    */
>   
>   #include <linux/interrupt.h>
> diff --git a/drivers/iio/adc/ad7793.c b/drivers/iio/adc/ad7793.c
> index 4ac3ae62f56f..886263a3d2b1 100644
> --- a/drivers/iio/adc/ad7793.c
> +++ b/drivers/iio/adc/ad7793.c
> @@ -1,9 +1,8 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * AD7785/AD7792/AD7793/AD7794/AD7795 SPI ADC driver
>    *
>    * Copyright 2011-2012 Analog Devices Inc.
> - *
> - * Licensed under the GPL-2.
>    */
>   
>   #include <linux/interrupt.h>
> diff --git a/drivers/iio/adc/ad7887.c b/drivers/iio/adc/ad7887.c
> index 9d4c2467d362..7c17b53dea2e 100644
> --- a/drivers/iio/adc/ad7887.c
> +++ b/drivers/iio/adc/ad7887.c
> @@ -1,9 +1,8 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * AD7887 SPI ADC driver
>    *
>    * Copyright 2010-2011 Analog Devices Inc.
> - *
> - * Licensed under the GPL-2.
>    */
>   
>   #include <linux/device.h>
> diff --git a/drivers/iio/adc/ad7923.c b/drivers/iio/adc/ad7923.c
> index d62dbb62be45..cad67ee9bb38 100644
> --- a/drivers/iio/adc/ad7923.c
> +++ b/drivers/iio/adc/ad7923.c
> @@ -1,10 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * AD7904/AD7914/AD7923/AD7924 SPI ADC driver
>    *
>    * Copyright 2011 Analog Devices Inc (from AD7923 Driver)
>    * Copyright 2012 CS Systemes d'Information
> - *
> - * Licensed under the GPL-2.
>    */
>   
>   #include <linux/device.h>
> diff --git a/drivers/iio/adc/ad799x.c b/drivers/iio/adc/ad799x.c
> index 7a5b5d00a87d..65d60fc173aa 100644
> --- a/drivers/iio/adc/ad799x.c
> +++ b/drivers/iio/adc/ad799x.c
> @@ -1,3 +1,4 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * iio/adc/ad799x.c
>    * Copyright (C) 2010-2011 Michael Hennerich, Analog Devices Inc.
> @@ -11,10 +12,6 @@
>    * based on linux/drivers/acron/char/pcf8583.c
>    * Copyright (C) 2000 Russell King
>    *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - *
>    * ad799x.c
>    *
>    * Support for ad7991, ad7995, ad7999, ad7992, ad7993, ad7994, ad7997,
> diff --git a/drivers/iio/adc/ad_sigma_delta.c b/drivers/iio/adc/ad_sigma_delta.c
> index ff5f2da2e1b1..cd0c3cda132a 100644
> --- a/drivers/iio/adc/ad_sigma_delta.c
> +++ b/drivers/iio/adc/ad_sigma_delta.c
> @@ -1,10 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * Support code for Analog Devices Sigma-Delta ADCs
>    *
>    * Copyright 2012 Analog Devices Inc.
>    *  Author: Lars-Peter Clausen <lars@metafoo.de>
> - *
> - * Licensed under the GPL-2.
>    */
>   
>   #include <linux/interrupt.h>
> diff --git a/drivers/iio/adc/aspeed_adc.c b/drivers/iio/adc/aspeed_adc.c
> index 9515ca165dfd..5eec9d2a3eb1 100644
> --- a/drivers/iio/adc/aspeed_adc.c
> +++ b/drivers/iio/adc/aspeed_adc.c
> @@ -1,12 +1,8 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * Aspeed AST2400/2500 ADC
>    *
>    * Copyright (C) 2017 Google, Inc.
> - *
> - * This program is free software; you can redistribute it and/or modify it
> - * under the terms and conditions of the GNU General Public License,
> - * version 2, as published by the Free Software Foundation.
> - *
>    */
>   
>   #include <linux/clk.h>
> diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c
> index d5ea84cf6460..62ceca3fe3bf 100644
> --- a/drivers/iio/adc/at91-sama5d2_adc.c
> +++ b/drivers/iio/adc/at91-sama5d2_adc.c
> @@ -1,17 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * Atmel ADC driver for SAMA5D2 devices and compatible.
>    *
>    * Copyright (C) 2015 Atmel,
>    *               2015 Ludovic Desroches <ludovic.desroches@atmel.com>
> - *
> - * This software is licensed under the terms of the GNU General Public
> - * License version 2, as published by the Free Software Foundation, and
> - * may be copied, distributed, and modified under those terms.
> - *
> - * This program is distributed in the hope that it will be useful,
> - * but WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> - * GNU General Public License for more details.
>    */
>   
>   #include <linux/bitops.h>
> diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
> index 75d2f73582a3..21b07413a998 100644
> --- a/drivers/iio/adc/at91_adc.c
> +++ b/drivers/iio/adc/at91_adc.c
> @@ -1,9 +1,8 @@
> +// SPDX-License-Identifier: GPL-2.0+
>   /*
>    * Driver for the ADC present in the Atmel AT91 evaluation boards.
>    *
>    * Copyright 2011 Free Electrons
> - *
> - * Licensed under the GPLv2 or later.
>    */
>   
>   #include <linux/bitmap.h>
> diff --git a/drivers/iio/adc/axp20x_adc.c b/drivers/iio/adc/axp20x_adc.c
> index 5be789269353..42eefe2593ec 100644
> --- a/drivers/iio/adc/axp20x_adc.c
> +++ b/drivers/iio/adc/axp20x_adc.c
> @@ -1,11 +1,8 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /* ADC driver for AXP20X and AXP22X PMICs
>    *
>    * Copyright (c) 2016 Free Electrons NextThing Co.
>    *	Quentin Schulz <quentin.schulz@free-electrons.com>
> - *
> - * This program is free software; you can redistribute it and/or modify it under
> - * the terms of the GNU General Public License version 2 as published by the
> - * Free Software Foundation.
>    */
>   
>   #include <linux/completion.h>
> diff --git a/drivers/iio/adc/axp288_adc.c b/drivers/iio/adc/axp288_adc.c
> index 031d568b4972..24c0ec2cfd67 100644
> --- a/drivers/iio/adc/axp288_adc.c
> +++ b/drivers/iio/adc/axp288_adc.c
> @@ -1,19 +1,8 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * axp288_adc.c - X-Powers AXP288 PMIC ADC Driver
>    *
>    * Copyright (C) 2014 Intel Corporation
> - *
> - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License as published by
> - * the Free Software Foundation; version 2 of the License.
> - *
> - * This program is distributed in the hope that it will be useful, but
> - * WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the GNU
> - * General Public License for more details.
> - *
>    */
>   
>   #include <linux/module.h>
> diff --git a/drivers/iio/adc/bcm_iproc_adc.c b/drivers/iio/adc/bcm_iproc_adc.c
> index 7af59a4bbd8d..2eadef68bd49 100644
> --- a/drivers/iio/adc/bcm_iproc_adc.c
> +++ b/drivers/iio/adc/bcm_iproc_adc.c
> @@ -1,17 +1,6 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * Copyright 2016 Broadcom
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License, version 2, as
> - * published by the Free Software Foundation (the "GPL").
> - *
> - * This program is distributed in the hope that it will be useful, but
> - * WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> - * General Public License version 2 (GPLv2) for more details.
> - *
> - * You should have received a copy of the GNU General Public License
> - * version 2 (GPLv2) along with this source code.
>    */
>   
>   #include <linux/module.h>
> diff --git a/drivers/iio/adc/berlin2-adc.c b/drivers/iio/adc/berlin2-adc.c
> index 72d8fa94ab31..3b0ca5f326ed 100644
> --- a/drivers/iio/adc/berlin2-adc.c
> +++ b/drivers/iio/adc/berlin2-adc.c
> @@ -1,13 +1,10 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * Marvell Berlin2 ADC driver
>    *
>    * Copyright (C) 2015 Marvell Technology Group Ltd.
>    *
>    * Antoine Tenart <antoine.tenart@free-electrons.com>
> - *
> - * This file is licensed under the terms of the GNU General Public
> - * License version 2. This program is licensed "as is" without any
> - * warranty of any kind, whether express or implied.
>    */
>   
>   #include <linux/iio/iio.h>
> diff --git a/drivers/iio/adc/cc10001_adc.c b/drivers/iio/adc/cc10001_adc.c
> index 707d8b24b072..8b72037e04b2 100644
> --- a/drivers/iio/adc/cc10001_adc.c
> +++ b/drivers/iio/adc/cc10001_adc.c
> @@ -1,10 +1,6 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * Copyright (c) 2014-2015 Imagination Technologies Ltd.
> - *
> - * This program is free software; you can redistribute it and/or modify it
> - * under the terms of the GNU General Public License version 2 as published by
> - * the Free Software Foundation.
> - *
>    */
>   
>   #include <linux/clk.h>
> diff --git a/drivers/iio/adc/cpcap-adc.c b/drivers/iio/adc/cpcap-adc.c
> index 9ad60421d360..c1bfa4543125 100644
> --- a/drivers/iio/adc/cpcap-adc.c
> +++ b/drivers/iio/adc/cpcap-adc.c
> @@ -1,3 +1,4 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * Copyright (C) 2017 Tony Lindgren <tony@atomide.com>
>    *
> @@ -5,15 +6,6 @@
>    * earlier driver found in the Motorola Linux kernel:
>    *
>    * Copyright (C) 2009-2010 Motorola, Inc.
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - *
> - * This program is distributed in the hope that it will be useful,
> - * but WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> - * GNU General Public License for more details.
>    */
>   
>   #include <linux/delay.h>
> diff --git a/drivers/iio/adc/da9150-gpadc.c b/drivers/iio/adc/da9150-gpadc.c
> index 0a5d9ce79164..620274890645 100644
> --- a/drivers/iio/adc/da9150-gpadc.c
> +++ b/drivers/iio/adc/da9150-gpadc.c
> @@ -1,14 +1,10 @@
> +// SPDX-License-Identifier: GPL-2.0+
>   /*
>    * DA9150 GPADC Driver
>    *
>    * Copyright (c) 2014 Dialog Semiconductor
>    *
>    * Author: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
> - *
> - * This program is free software; you can redistribute  it and/or modify it
> - * under  the terms of  the GNU General  Public License as published by the
> - * Free Software Foundation;  either version 2 of the  License, or (at your
> - * option) any later version.
>    */
>   
>   #include <linux/kernel.h>
> diff --git a/drivers/iio/adc/dln2-adc.c b/drivers/iio/adc/dln2-adc.c
> index c64c6675cae6..03f0f8fc6350 100644
> --- a/drivers/iio/adc/dln2-adc.c
> +++ b/drivers/iio/adc/dln2-adc.c
> @@ -1,11 +1,8 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * Driver for the Diolan DLN-2 USB-ADC adapter
>    *
>    * Copyright (c) 2017 Jack Andersen
> - *
> - * This program is free software; you can redistribute it and/or
> - * modify it under the terms of the GNU General Public License as
> - * published by the Free Software Foundation, version 2.
>    */
>   
>   #include <linux/kernel.h>
> diff --git a/drivers/iio/adc/ep93xx_adc.c b/drivers/iio/adc/ep93xx_adc.c
> index 5036c392cb20..8f614c84b643 100644
> --- a/drivers/iio/adc/ep93xx_adc.c
> +++ b/drivers/iio/adc/ep93xx_adc.c
> @@ -1,12 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * Driver for ADC module on the Cirrus Logic EP93xx series of SoCs
>    *
>    * Copyright (C) 2015 Alexander Sverdlin
>    *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - *
>    * The driver uses polling to get the conversion status. According to EP93xx
>    * datasheets, reading ADCResult register starts the conversion, but user is also
>    * responsible for ensuring that delay between adjacent conversion triggers is
> diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c
> index f10443f92e4c..9f9c186e2135 100644
> --- a/drivers/iio/adc/exynos_adc.c
> +++ b/drivers/iio/adc/exynos_adc.c
> @@ -1,3 +1,4 @@
> +// SPDX-License-Identifier: GPL-2.0+
>   /*
>    *  exynos_adc.c - Support for ADC in EXYNOS SoCs
>    *
> @@ -5,16 +6,6 @@
>    *
>    *  Copyright (C) 2013 Naveen Krishna Chatradhi <ch.naveen@samsung.com>
>    *
> - *  This program is free software; you can redistribute it and/or modify
> - *  it under the terms of the GNU General Public License as published by
> - *  the Free Software Foundation; either version 2 of the License, or
> - *  (at your option) any later version.
> - *
> - *  This program is distributed in the hope that it will be useful,
> - *  but WITHOUT ANY WARRANTY; without even the implied warranty of
> - *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> - *  GNU General Public License for more details.
> - *
>    *  You should have received a copy of the GNU General Public License
>    *  along with this program; if not, write to the Free Software
>    *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
> diff --git a/drivers/iio/adc/fsl-imx25-gcq.c b/drivers/iio/adc/fsl-imx25-gcq.c
> index 929c617db364..e03a434b3cd5 100644
> --- a/drivers/iio/adc/fsl-imx25-gcq.c
> +++ b/drivers/iio/adc/fsl-imx25-gcq.c
> @@ -1,10 +1,7 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * Copyright (C) 2014-2015 Pengutronix, Markus Pargmann <mpa@pengutronix.de>
>    *
> - * This program is free software; you can redistribute it and/or modify it under
> - * the terms of the GNU General Public License version 2 as published by the
> - * Free Software Foundation.
> - *
>    * This is the driver for the imx25 GCQ (Generic Conversion Queue)
>    * connected to the imx25 ADC.
>    */
> diff --git a/drivers/iio/adc/hi8435.c b/drivers/iio/adc/hi8435.c
> index 6f6c9a348158..0b6bf71af685 100644
> --- a/drivers/iio/adc/hi8435.c
> +++ b/drivers/iio/adc/hi8435.c
> @@ -1,13 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0+
>   /*
>    * Holt Integrated Circuits HI-8435 threshold detector driver
>    *
>    * Copyright (C) 2015 Zodiac Inflight Innovations
>    * Copyright (C) 2015 Cogent Embedded, Inc.
> - *
> - * This program is free software; you can redistribute  it and/or modify it
> - * under  the terms of  the GNU General  Public License as published by the
> - * Free Software Foundation;  either version 2 of the  License, or (at your
> - * option) any later version.
>    */
>   
>   #include <linux/delay.h>
> diff --git a/drivers/iio/adc/hx711.c b/drivers/iio/adc/hx711.c
> index 36b59d8957fb..894d49843854 100644
> --- a/drivers/iio/adc/hx711.c
> +++ b/drivers/iio/adc/hx711.c
> @@ -1,13 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0+
>   /*
>    * HX711: analog to digital converter for weight sensor module
>    *
>    * Copyright (c) 2016 Andreas Klinger <ak@it-klinger.de>
>    *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License as published by
> - * the Free Software Foundation; either version 2 of the License, or
> - * (at your option) any later version.
> - *
>    * This program is distributed in the hope that it will be useful,
>    * but WITHOUT ANY WARRANTY; without even the implied warranty of
>    * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> diff --git a/drivers/iio/adc/imx7d_adc.c b/drivers/iio/adc/imx7d_adc.c
> index ad6764fb2a23..2f54ea1e4292 100644
> --- a/drivers/iio/adc/imx7d_adc.c
> +++ b/drivers/iio/adc/imx7d_adc.c
> @@ -1,12 +1,8 @@
> +// SPDX-License-Identifier: GPL-2.0+
>   /*
>    * Freescale i.MX7D ADC driver
>    *
>    * Copyright (C) 2015 Freescale Semiconductor, Inc.
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License as published by
> - * the Free Software Foundation; either version 2 of the License, or
> - * (at your option) any later version.
>    */
>   
>   #include <linux/clk.h>
> diff --git a/drivers/iio/adc/ina2xx-adc.c b/drivers/iio/adc/ina2xx-adc.c
> index bdd7cba6f6b0..9bbcca9df401 100644
> --- a/drivers/iio/adc/ina2xx-adc.c
> +++ b/drivers/iio/adc/ina2xx-adc.c
> @@ -1,20 +1,15 @@
> +// SPDX-License-Identifier: GPL-2.0+
>   /*
>    * INA2XX Current and Power Monitors
>    *
>    * Copyright 2015 Baylibre SAS.
>    *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - *
>    * Based on linux/drivers/iio/adc/ad7291.c
>    * Copyright 2010-2011 Analog Devices Inc.
>    *
>    * Based on linux/drivers/hwmon/ina2xx.c
>    * Copyright 2012 Lothar Felten <l-felten@ti.com>
>    *
> - * Licensed under the GPL-2 or later.
> - *
>    * IIO driver for INA219-220-226-230-231
>    *
>    * Configurable 7-bit I2C slave address from 0x40 to 0x4F
> diff --git a/drivers/iio/adc/lp8788_adc.c b/drivers/iio/adc/lp8788_adc.c
> index 3bc4df916420..09dd55bff7bc 100644
> --- a/drivers/iio/adc/lp8788_adc.c
> +++ b/drivers/iio/adc/lp8788_adc.c
> @@ -1,13 +1,10 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * TI LP8788 MFD - ADC driver
>    *
>    * Copyright 2012 Texas Instruments
>    *
>    * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
>    */
>   
>   #include <linux/delay.h>
> diff --git a/drivers/iio/adc/lpc18xx_adc.c b/drivers/iio/adc/lpc18xx_adc.c
> index 041dc4a3f66c..00d39234143d 100644
> --- a/drivers/iio/adc/lpc18xx_adc.c
> +++ b/drivers/iio/adc/lpc18xx_adc.c
> @@ -1,12 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * IIO ADC driver for NXP LPC18xx ADC
>    *
>    * Copyright (C) 2016 Joachim Eastwood <manabian@gmail.com>
>    *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - *
>    * UNSUPPORTED hardware features:
>    *  - Hardware triggers
>    *  - Burst mode
> diff --git a/drivers/iio/adc/lpc32xx_adc.c b/drivers/iio/adc/lpc32xx_adc.c
> index 20b36690fa4f..e361c1532a75 100644
> --- a/drivers/iio/adc/lpc32xx_adc.c
> +++ b/drivers/iio/adc/lpc32xx_adc.c
> @@ -1,23 +1,10 @@
> +// SPDX-License-Identifier: GPL-2.0+
>   /*
>    *  lpc32xx_adc.c - Support for ADC in LPC32XX
>    *
>    *  3-channel, 10-bit ADC
>    *
>    *  Copyright (C) 2011, 2012 Roland Stigge <stigge@antcom.de>
> - *
> - *  This program is free software; you can redistribute it and/or modify
> - *  it under the terms of the GNU General Public License as published by
> - *  the Free Software Foundation; either version 2 of the License, or
> - *  (at your option) any later version.
> - *
> - *  This program is distributed in the hope that it will be useful,
> - *  but WITHOUT ANY WARRANTY; without even the implied warranty of
> - *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> - *  GNU General Public License for more details.
> - *
> - *  You should have received a copy of the GNU General Public License
> - *  along with this program; if not, write to the Free Software
> - *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
>    */
>   
>   #include <linux/module.h>
> diff --git a/drivers/iio/adc/ltc2471.c b/drivers/iio/adc/ltc2471.c
> index b88102b751cf..9d5326377676 100644
> --- a/drivers/iio/adc/ltc2471.c
> +++ b/drivers/iio/adc/ltc2471.c
> @@ -1,11 +1,10 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * Driver for Linear Technology LTC2471 and LTC2473 voltage monitors
>    * The LTC2473 is identical to the 2471, but reports a differential signal.
>    *
>    * Copyright (C) 2017 Topic Embedded Products
>    * Author: Mike Looijmans <mike.looijmans@topic.nl>
> - *
> - * License: GPLv2
>    */
>   
>   #include <linux/err.h>
> diff --git a/drivers/iio/adc/ltc2485.c b/drivers/iio/adc/ltc2485.c
> index b24c14037fd4..c0e9a7ba7af4 100644
> --- a/drivers/iio/adc/ltc2485.c
> +++ b/drivers/iio/adc/ltc2485.c
> @@ -1,12 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * ltc2485.c - Driver for Linear Technology LTC2485 ADC
>    *
>    * Copyright (C) 2016 Alison Schofield <amsfield22@gmail.com>
>    *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - *
>    * Datasheet: http://cds.linear.com/docs/en/datasheet/2485fd.pdf
>    */
>   
> diff --git a/drivers/iio/adc/ltc2497.c b/drivers/iio/adc/ltc2497.c
> index f1f7cdf66fbd..0fe12c0e3b3c 100644
> --- a/drivers/iio/adc/ltc2497.c
> +++ b/drivers/iio/adc/ltc2497.c
> @@ -1,10 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * ltc2497.c - Driver for Analog Devices/Linear Technology LTC2497 ADC
>    *
>    * Copyright (C) 2017 Analog Devices Inc.
>    *
> - * Licensed under the GPL-2.
> - *
>    * Datasheet: http://cds.linear.com/docs/en/datasheet/2497fd.pdf
>    */
>   
> diff --git a/drivers/iio/adc/max1027.c b/drivers/iio/adc/max1027.c
> index 311c1a89c329..af83207b2804 100644
> --- a/drivers/iio/adc/max1027.c
> +++ b/drivers/iio/adc/max1027.c
> @@ -1,3 +1,4 @@
> +// SPDX-License-Identifier: GPL-2.0
>    /*
>     * iio/adc/max1027.c
>     * Copyright (C) 2014 Philippe Reynes
> @@ -6,10 +7,6 @@
>     * Copyright 2011 Analog Devices Inc (from AD7923 Driver)
>     * Copyright 2012 CS Systemes d'Information
>     *
> -  * This program is free software; you can redistribute it and/or modify
> -  * it under the terms of the GNU General Public License version 2 as
> -  * published by the Free Software Foundation.
> -  *
>     * max1027.c
>     *
>     * Partial support for max1027 and similar chips.
> diff --git a/drivers/iio/adc/max1118.c b/drivers/iio/adc/max1118.c
> index 49db9e9ae625..027ee7f6f5d0 100644
> --- a/drivers/iio/adc/max1118.c
> +++ b/drivers/iio/adc/max1118.c
> @@ -1,12 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * MAX1117/MAX1118/MAX1119 8-bit, dual-channel ADCs driver
>    *
>    * Copyright (c) 2017 Akinobu Mita <akinobu.mita@gmail.com>
>    *
> - * This file is subject to the terms and conditions of version 2 of
> - * the GNU General Public License.  See the file COPYING in the main
> - * directory of this archive for more details.
> - *
>    * Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX1117-MAX1119.pdf
>    *
>    * SPI interface connections
> diff --git a/drivers/iio/adc/max1363.c b/drivers/iio/adc/max1363.c
> index a8d35aebee80..6d191ffc4c7e 100644
> --- a/drivers/iio/adc/max1363.c
> +++ b/drivers/iio/adc/max1363.c
> @@ -1,3 +1,4 @@
> +// SPDX-License-Identifier: GPL-2.0
>    /*
>     * iio/adc/max1363.c
>     * Copyright (C) 2008-2010 Jonathan Cameron
> @@ -9,10 +10,6 @@
>     * Copyright (C) 2000 Russell King
>     *
>     * Driver for max1363 and similar chips.
> -  *
> -  * This program is free software; you can redistribute it and/or modify
> -  * it under the terms of the GNU General Public License version 2 as
> -  * published by the Free Software Foundation.
>     */
>   
>   #include <linux/interrupt.h>
> diff --git a/drivers/iio/adc/mcp320x.c b/drivers/iio/adc/mcp320x.c
> index a04856d8afdb..4b873afe8e5a 100644
> --- a/drivers/iio/adc/mcp320x.c
> +++ b/drivers/iio/adc/mcp320x.c
> @@ -1,3 +1,4 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * Copyright (C) 2013 Oskar Andero <oskar.andero@gmail.com>
>    * Copyright (C) 2014 Rose Technology
> @@ -34,10 +35,6 @@
>    * http://ww1.microchip.com/downloads/en/DeviceDoc/21298c.pdf  mcp3204/08
>    * http://ww1.microchip.com/downloads/en/DeviceDoc/21700E.pdf  mcp3301
>    * http://ww1.microchip.com/downloads/en/DeviceDoc/21950D.pdf  mcp3550/1/3
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
>    */
>   
>   #include <linux/err.h>
> diff --git a/drivers/iio/adc/mcp3422.c b/drivers/iio/adc/mcp3422.c
> index 819f26011500..c8232ba24667 100644
> --- a/drivers/iio/adc/mcp3422.c
> +++ b/drivers/iio/adc/mcp3422.c
> @@ -1,3 +1,4 @@
> +// SPDX-License-Identifier: GPL-2.0+
>   /*
>    * mcp3422.c - driver for the Microchip mcp3421/2/3/4/5/6/7/8 chip family
>    *
> @@ -10,11 +11,6 @@
>    *
>    * This driver exports the value of analog input voltage to sysfs, the
>    * voltage unit is nV.
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License as published by
> - * the Free Software Foundation; either version 2 of the License, or
> - * (at your option) any later version.
>    */
>   
>   #include <linux/err.h>
> diff --git a/drivers/iio/adc/men_z188_adc.c b/drivers/iio/adc/men_z188_adc.c
> index c80261748d8f..0cb809bf1730 100644
> --- a/drivers/iio/adc/men_z188_adc.c
> +++ b/drivers/iio/adc/men_z188_adc.c
> @@ -1,12 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * MEN 16z188 Analog to Digial Converter
>    *
>    * Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de)
>    * Author: Johannes Thumshirn <johannes.thumshirn@men.de>
> - *
> - * This program is free software; you can redistribute it and/or modify it
> - * under the terms of the GNU General Public License as published by the Free
> - * Software Foundation; version 2 of the License.
>    */
>   
>   #include <linux/kernel.h>
> diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
> index 729becb2d3d9..f5299c9bdbde 100644
> --- a/drivers/iio/adc/meson_saradc.c
> +++ b/drivers/iio/adc/meson_saradc.c
> @@ -1,12 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * Amlogic Meson Successive Approximation Register (SAR) A/D Converter
>    *
>    * Copyright (C) 2017 Martin Blumenstingl <martin.blumenstingl@googlemail.com>
>    *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - *
>    * You should have received a copy of the GNU General Public License
>    * along with this program. If not, see <http://www.gnu.org/licenses/>.
>    */
> diff --git a/drivers/iio/adc/mt6577_auxadc.c b/drivers/iio/adc/mt6577_auxadc.c
> index 95d76abb64ec..cba0e47c6013 100644
> --- a/drivers/iio/adc/mt6577_auxadc.c
> +++ b/drivers/iio/adc/mt6577_auxadc.c
> @@ -1,15 +1,7 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * Copyright (c) 2016 MediaTek Inc.
>    * Author: Zhiyong Tao <zhiyong.tao@mediatek.com>
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - *
> - * This program is distributed in the hope that it will be useful,
> - * but WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> - * GNU General Public License for more details.
>    */
>   
>   #include <linux/clk.h>
> diff --git a/drivers/iio/adc/mxs-lradc-adc.c b/drivers/iio/adc/mxs-lradc-adc.c
> index c627513d9f0f..80983334e5c2 100644
> --- a/drivers/iio/adc/mxs-lradc-adc.c
> +++ b/drivers/iio/adc/mxs-lradc-adc.c
> @@ -1,3 +1,4 @@
> +// SPDX-License-Identifier: GPL-2.0+
>   /*
>    * Freescale MXS LRADC ADC driver
>    *
> @@ -7,16 +8,6 @@
>    * Authors:
>    *  Marek Vasut <marex@denx.de>
>    *  Ksenija Stanojevic <ksenija.stanojevic@gmail.com>
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License as published by
> - * the Free Software Foundation; either version 2 of the License, or
> - * (at your option) any later version.
> - *
> - * This program is distributed in the hope that it will be useful,
> - * but WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> - * GNU General Public License for more details.
>    */
>   
>   #include <linux/completion.h>
> diff --git a/drivers/iio/adc/nau7802.c b/drivers/iio/adc/nau7802.c
> index 8997e74a8847..4e53a63e5fb9 100644
> --- a/drivers/iio/adc/nau7802.c
> +++ b/drivers/iio/adc/nau7802.c
> @@ -1,9 +1,8 @@
> +// SPDX-License-Identifier: GPL-2.0+
>   /*
>    * Driver for the Nuvoton NAU7802 ADC
>    *
>    * Copyright 2013 Free Electrons
> - *
> - * Licensed under the GPLv2 or later.
>    */
>   
>   #include <linux/delay.h>
> diff --git a/drivers/iio/adc/palmas_gpadc.c b/drivers/iio/adc/palmas_gpadc.c
> index 69b9affeef1e..45d1bf1253d7 100644
> --- a/drivers/iio/adc/palmas_gpadc.c
> +++ b/drivers/iio/adc/palmas_gpadc.c
> @@ -1,13 +1,10 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * palmas-adc.c -- TI PALMAS GPADC.
>    *
>    * Copyright (c) 2013, NVIDIA Corporation. All rights reserved.
>    *
>    * Author: Pradeep Goudagunta <pgoudagunta@nvidia.com>
> - *
> - * This program is free software; you can redistribute it and/or
> - * modify it under the terms of the GNU General Public License as
> - * published by the Free Software Foundation version 2.
>    */
>   
>   #include <linux/module.h>
> diff --git a/drivers/iio/adc/qcom-pm8xxx-xoadc.c b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
> index c30c002f1fef..648136ed1f85 100644
> --- a/drivers/iio/adc/qcom-pm8xxx-xoadc.c
> +++ b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
> @@ -1,3 +1,4 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * Qualcomm PM8xxx PMIC XOADC driver
>    *
> diff --git a/drivers/iio/adc/qcom-spmi-iadc.c b/drivers/iio/adc/qcom-spmi-iadc.c
> index 3f062cd61aba..a8402a47c8e4 100644
> --- a/drivers/iio/adc/qcom-spmi-iadc.c
> +++ b/drivers/iio/adc/qcom-spmi-iadc.c
> @@ -1,14 +1,6 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 and
> - * only version 2 as published by the Free Software Foundation.
> - *
> - * This program is distributed in the hope that it will be useful,
> - * but WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> - * GNU General Public License for more details.
>    */
>   
>   #include <linux/bitops.h>
> diff --git a/drivers/iio/adc/qcom-spmi-vadc.c b/drivers/iio/adc/qcom-spmi-vadc.c
> index 3680e0d47412..f3e8fdee39d8 100644
> --- a/drivers/iio/adc/qcom-spmi-vadc.c
> +++ b/drivers/iio/adc/qcom-spmi-vadc.c
> @@ -1,14 +1,6 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 and
> - * only version 2 as published by the Free Software Foundation.
> - *
> - * This program is distributed in the hope that it will be useful,
> - * but WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> - * GNU General Public License for more details.
>    */
>   
>   #include <linux/bitops.h>
> diff --git a/drivers/iio/adc/rockchip_saradc.c b/drivers/iio/adc/rockchip_saradc.c
> index 1f98566d5b3c..234c6df348ce 100644
> --- a/drivers/iio/adc/rockchip_saradc.c
> +++ b/drivers/iio/adc/rockchip_saradc.c
> @@ -1,16 +1,7 @@
> +// SPDX-License-Identifier: GPL-2.0+
>   /*
>    * Rockchip Successive Approximation Register (SAR) A/D Converter
>    * Copyright (C) 2014 ROCKCHIP, Inc.
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License as published by
> - * the Free Software Foundation; either version 2 of the License, or
> - * (at your option) any later version.
> - *
> - * This program is distributed in the hope that it will be useful,
> - * but WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> - * GNU General Public License for more details.
>    */
>   
>   #include <linux/module.h>
> diff --git a/drivers/iio/adc/spear_adc.c b/drivers/iio/adc/spear_adc.c
> index b1da2c46107c..009019a39bba 100644
> --- a/drivers/iio/adc/spear_adc.c
> +++ b/drivers/iio/adc/spear_adc.c
> @@ -1,9 +1,8 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * ST SPEAr ADC driver
>    *
>    * Copyright 2012 Stefan Roese <sr@denx.de>
> - *
> - * Licensed under the GPL-2.
>    */
>   
>   #include <linux/module.h>
> diff --git a/drivers/iio/adc/stx104.c b/drivers/iio/adc/stx104.c
> index 0662ca199eb0..f9d0aaae836f 100644
> --- a/drivers/iio/adc/stx104.c
> +++ b/drivers/iio/adc/stx104.c
> @@ -1,15 +1,7 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * IIO driver for the Apex Embedded Systems STX104
>    * Copyright (C) 2016 William Breathitt Gray
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License, version 2, as
> - * published by the Free Software Foundation.
> - *
> - * This program is distributed in the hope that it will be useful, but
> - * WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> - * General Public License for more details.
>    */
>   #include <linux/bitops.h>
>   #include <linux/device.h>
> diff --git a/drivers/iio/adc/sun4i-gpadc-iio.c b/drivers/iio/adc/sun4i-gpadc-iio.c
> index 04d7147e0110..f13c6248a662 100644
> --- a/drivers/iio/adc/sun4i-gpadc-iio.c
> +++ b/drivers/iio/adc/sun4i-gpadc-iio.c
> @@ -1,11 +1,8 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /* ADC driver for sunxi platforms' (A10, A13 and A31) GPADC
>    *
>    * Copyright (c) 2016 Quentin Schulz <quentin.schulz@free-electrons.com>
>    *
> - * This program is free software; you can redistribute it and/or modify it under
> - * the terms of the GNU General Public License version 2 as published by the
> - * Free Software Foundation.
> - *
>    * The Allwinner SoCs all have an ADC that can also act as a touchscreen
>    * controller and a thermal sensor.
>    * The thermal sensor works only when the ADC acts as a touchscreen controller
> diff --git a/drivers/iio/adc/ti-adc081c.c b/drivers/iio/adc/ti-adc081c.c
> index 405e3779c0c5..92c7584298f6 100644
> --- a/drivers/iio/adc/ti-adc081c.c
> +++ b/drivers/iio/adc/ti-adc081c.c
> @@ -1,13 +1,10 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * TI ADC081C/ADC101C/ADC121C 8/10/12-bit ADC driver
>    *
>    * Copyright (C) 2012 Avionic Design GmbH
>    * Copyright (C) 2016 Intel
>    *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - *
>    * Datasheets:
>    *	http://www.ti.com/lit/ds/symlink/adc081c021.pdf
>    *	http://www.ti.com/lit/ds/symlink/adc101c021.pdf
> diff --git a/drivers/iio/adc/ti-adc0832.c b/drivers/iio/adc/ti-adc0832.c
> index 188dae705bf7..482a00dc9273 100644
> --- a/drivers/iio/adc/ti-adc0832.c
> +++ b/drivers/iio/adc/ti-adc0832.c
> @@ -1,12 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * ADC0831/ADC0832/ADC0834/ADC0838 8-bit ADC driver
>    *
>    * Copyright (c) 2016 Akinobu Mita <akinobu.mita@gmail.com>
>    *
> - * This file is subject to the terms and conditions of version 2 of
> - * the GNU General Public License.  See the file COPYING in the main
> - * directory of this archive for more details.
> - *
>    * Datasheet: http://www.ti.com/lit/ds/symlink/adc0832-n.pdf
>    */
>   
> diff --git a/drivers/iio/adc/ti-adc084s021.c b/drivers/iio/adc/ti-adc084s021.c
> index 25504640e126..914d097c8758 100644
> --- a/drivers/iio/adc/ti-adc084s021.c
> +++ b/drivers/iio/adc/ti-adc084s021.c
> @@ -1,13 +1,10 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /**
>    * Copyright (C) 2017 Axis Communications AB
>    *
>    * Driver for Texas Instruments' ADC084S021 ADC chip.
>    * Datasheets can be found here:
>    * http://www.ti.com/lit/ds/symlink/adc084s021.pdf
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
>    */
>   
>   #include <linux/err.h>
> diff --git a/drivers/iio/adc/ti-adc108s102.c b/drivers/iio/adc/ti-adc108s102.c
> index 841203edaac5..a1c16199e7cc 100644
> --- a/drivers/iio/adc/ti-adc108s102.c
> +++ b/drivers/iio/adc/ti-adc108s102.c
> @@ -1,18 +1,10 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * TI ADC108S102 SPI ADC driver
>    *
>    * Copyright (c) 2013-2015 Intel Corporation.
>    * Copyright (c) 2017 Siemens AG
>    *
> - * This program is free software; you can redistribute it and/or modify it
> - * under the terms and conditions of the GNU General Public License,
> - * version 2, as published by the Free Software Foundation.
> - *
> - * This program is distributed in the hope it will be useful, but WITHOUT
> - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> - * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
> - * more details.
> - *
>    * This IIO device driver is designed to work with the following
>    * analog to digital converters from Texas Instruments:
>    *  ADC108S102
> diff --git a/drivers/iio/adc/ti-adc12138.c b/drivers/iio/adc/ti-adc12138.c
> index 703d68ae96b7..9445b79ad7b8 100644
> --- a/drivers/iio/adc/ti-adc12138.c
> +++ b/drivers/iio/adc/ti-adc12138.c
> @@ -1,12 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * ADC12130/ADC12132/ADC12138 12-bit plus sign ADC driver
>    *
>    * Copyright (c) 2016 Akinobu Mita <akinobu.mita@gmail.com>
>    *
> - * This file is subject to the terms and conditions of version 2 of
> - * the GNU General Public License.  See the file COPYING in the main
> - * directory of this archive for more details.
> - *
>    * Datasheet: http://www.ti.com/lit/ds/symlink/adc12138.pdf
>    */
>   
> diff --git a/drivers/iio/adc/ti-ads1015.c b/drivers/iio/adc/ti-ads1015.c
> index 6a114dcb4a3a..cddb41a3919c 100644
> --- a/drivers/iio/adc/ti-ads1015.c
> +++ b/drivers/iio/adc/ti-ads1015.c
> @@ -1,12 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * ADS1015 - Texas Instruments Analog-to-Digital Converter
>    *
>    * Copyright (c) 2016, Intel Corporation.
>    *
> - * This file is subject to the terms and conditions of version 2 of
> - * the GNU General Public License.  See the file COPYING in the main
> - * directory of this archive for more details.
> - *
>    * IIO driver for ADS1015 ADC 7-bit I2C slave address:
>    *	* 0x48 - ADDR connected to Ground
>    *	* 0x49 - ADDR connected to Vdd
> diff --git a/drivers/iio/adc/ti-ads8688.c b/drivers/iio/adc/ti-ads8688.c
> index 184d686ebd99..83d99a79f79e 100644
> --- a/drivers/iio/adc/ti-ads8688.c
> +++ b/drivers/iio/adc/ti-ads8688.c
> @@ -1,9 +1,6 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * Copyright (C) 2015 Prevas A/S
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
>    */
>   
>   #include <linux/device.h>
> diff --git a/drivers/iio/adc/ti-tlc4541.c b/drivers/iio/adc/ti-tlc4541.c
> index 2290024c89fc..945d547302c6 100644
> --- a/drivers/iio/adc/ti-tlc4541.c
> +++ b/drivers/iio/adc/ti-tlc4541.c
> @@ -1,3 +1,4 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * TI tlc4541 ADC Driver
>    *
> @@ -7,10 +8,6 @@
>    * http://www.ti.com/lit/gpn/tlc3541
>    * http://www.ti.com/lit/gpn/tlc4541
>    *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - *
>    * The tlc4541 requires 24 clock cycles to start a transfer.
>    * Conversion then takes 2.94us to complete before data is ready
>    * Data is returned MSB first.
> diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
> index cafb1dcadc48..aac5a1959b78 100644
> --- a/drivers/iio/adc/ti_am335x_adc.c
> +++ b/drivers/iio/adc/ti_am335x_adc.c
> @@ -1,16 +1,8 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * TI ADC MFD driver
>    *
>    * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
> - *
> - * This program is free software; you can redistribute it and/or
> - * modify it under the terms of the GNU General Public License as
> - * published by the Free Software Foundation version 2.
> - *
> - * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> - * kind, whether express or implied; without even the implied warranty
> - * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> - * GNU General Public License for more details.
>    */
>   
>   #include <linux/kernel.h>
> diff --git a/drivers/iio/adc/twl4030-madc.c b/drivers/iio/adc/twl4030-madc.c
> index 8c019bb6625f..d3ea08f8d33d 100644
> --- a/drivers/iio/adc/twl4030-madc.c
> +++ b/drivers/iio/adc/twl4030-madc.c
> @@ -1,3 +1,4 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    *
>    * TWL4030 MADC module driver-This driver monitors the real time
> @@ -12,21 +13,6 @@
>    * Mikko Ylinen <mikko.k.ylinen@nokia.com>
>    *
>    * Amit Kucheria <amit.kucheria@canonical.com>
> - *
> - * This program is free software; you can redistribute it and/or
> - * modify it under the terms of the GNU General Public License
> - * version 2 as published by the Free Software Foundation.
> - *
> - * This program is distributed in the hope that it will be useful, but
> - * WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> - * General Public License for more details.
> - *
> - * You should have received a copy of the GNU General Public License
> - * along with this program; if not, write to the Free Software
> - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
> - * 02110-1301 USA
> - *
>    */
>   
>   #include <linux/device.h>
> diff --git a/drivers/iio/adc/twl6030-gpadc.c b/drivers/iio/adc/twl6030-gpadc.c
> index e470510e76ea..201027839c1e 100644
> --- a/drivers/iio/adc/twl6030-gpadc.c
> +++ b/drivers/iio/adc/twl6030-gpadc.c
> @@ -1,3 +1,4 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * TWL6030 GPADC module driver
>    *
> @@ -12,21 +13,6 @@
>    * Based on twl4030-madc.c
>    * Copyright (C) 2008 Nokia Corporation
>    * Mikko Ylinen <mikko.k.ylinen@nokia.com>
> - *
> - * This program is free software; you can redistribute it and/or
> - * modify it under the terms of the GNU General Public License
> - * version 2 as published by the Free Software Foundation.
> - *
> - * This program is distributed in the hope that it will be useful, but
> - * WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> - * General Public License for more details.
> - *
> - * You should have received a copy of the GNU General Public License
> - * along with this program; if not, write to the Free Software
> - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
> - * 02110-1301 USA
> - *
>    */
>   #include <linux/interrupt.h>
>   #include <linux/kernel.h>
> diff --git a/drivers/iio/adc/vf610_adc.c b/drivers/iio/adc/vf610_adc.c
> index bbcb7a4d7edf..a9d13b8b9a68 100644
> --- a/drivers/iio/adc/vf610_adc.c
> +++ b/drivers/iio/adc/vf610_adc.c
> @@ -1,21 +1,8 @@
> +// SPDX-License-Identifier: GPL-2.0+
>   /*
>    * Freescale Vybrid vf610 ADC driver
>    *
>    * Copyright 2013 Freescale Semiconductor, Inc.
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License as published by
> - * the Free Software Foundation; either version 2 of the License, or
> - * (at your option) any later version.
> - *
> - * This program is distributed in the hope that it will be useful,
> - * but WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> - * GNU General Public License for more details.
> - *
> - *  You should have received a copy of the GNU General Public License
> - *  along with this program; if not, write to the Free Software
> - *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
>    */
>   
>   #include <linux/module.h>
> diff --git a/drivers/iio/adc/viperboard_adc.c b/drivers/iio/adc/viperboard_adc.c
> index 53eb5a4136fe..5b64a5ea488f 100644
> --- a/drivers/iio/adc/viperboard_adc.c
> +++ b/drivers/iio/adc/viperboard_adc.c
> @@ -1,15 +1,10 @@
> +// SPDX-License-Identifier: GPL-2.0+
>   /*
>    *  Nano River Technologies viperboard IIO ADC driver
>    *
>    *  (C) 2012 by Lemonage GmbH
>    *  Author: Lars Poeschel <poeschel@lemonage.de>
>    *  All rights reserved.
> - *
> - *  This program is free software; you can redistribute  it and/or modify it
> - *  under  the terms of  the GNU General  Public License as published by the
> - *  Free Software Foundation;  either version 2 of the	License, or (at your
> - *  option) any later version.
> - *
>    */
>   
>   #include <linux/kernel.h>
> diff --git a/drivers/iio/adc/xilinx-xadc-core.c b/drivers/iio/adc/xilinx-xadc-core.c
> index 3f6be5ac049a..b7b5adf6c9fc 100644
> --- a/drivers/iio/adc/xilinx-xadc-core.c
> +++ b/drivers/iio/adc/xilinx-xadc-core.c
> @@ -1,11 +1,10 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * Xilinx XADC driver
>    *
>    * Copyright 2013-2014 Analog Devices Inc.
>    *  Author: Lars-Peter Clauen <lars@metafoo.de>
>    *
> - * Licensed under the GPL-2.
> - *
>    * Documentation for the parts can be found at:
>    *  - XADC hardmacro: Xilinx UG480
>    *  - ZYNQ XADC interface: Xilinx UG585
> diff --git a/drivers/iio/adc/xilinx-xadc-events.c b/drivers/iio/adc/xilinx-xadc-events.c
> index dc0670308253..0c81ad4f0a05 100644
> --- a/drivers/iio/adc/xilinx-xadc-events.c
> +++ b/drivers/iio/adc/xilinx-xadc-events.c
> @@ -1,10 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * Xilinx XADC driver
>    *
>    * Copyright 2013 Analog Devices Inc.
>    *  Author: Lars-Peter Clauen <lars@metafoo.de>
> - *
> - * Licensed under the GPL-2.
>    */
>   
>   #include <linux/iio/events.h>
> diff --git a/drivers/iio/adc/xilinx-xadc.h b/drivers/iio/adc/xilinx-xadc.h
> index 8c0009585c16..5b9042e7441d 100644
> --- a/drivers/iio/adc/xilinx-xadc.h
> +++ b/drivers/iio/adc/xilinx-xadc.h
> @@ -1,10 +1,9 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
>   /*
>    * Xilinx XADC driver
>    *
>    * Copyright 2013 Analog Devices Inc.
>    *  Author: Lars-Peter Clauen <lars@metafoo.de>
> - *
> - * Licensed under the GPL-2.
>    */
>   
>   #ifndef __IIO_XILINX_XADC__
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  </head>
  <body text="#000000" bgcolor="#FFFFFF">
    <p><br>
    </p>
    <div class="moz-cite-prefix">On 2018-11-28 9:53 a.m., Matheus
      Tavares wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:20181128175312.9634-1-matheus.bernardino@usp.br">
      <pre class="moz-quote-pre" wrap="">From: Lucas Santos <a class="moz-txt-link-rfc2396E" href="mailto:ilucas.ms@gmail.com">&lt;ilucas.ms@gmail.com&gt;</a>

This patch removes all license boilerplate texts from the .c and .h</pre>
    </blockquote>
    <p><a class="external-link"
href="https://www.kernel.org/doc/html/latest/process/submitting-patches.html"
        rel="nofollow" style="color: rgb(50, 108, 166); text-decoration:
        none; font-family: Arial, sans-serif; font-size: 14px;
        font-style: normal; font-variant-ligatures: normal;
        font-variant-caps: normal; font-weight: 400; letter-spacing:
        normal; orphans: 2; text-align: start; text-indent: 0px;
        text-transform: none; white-space: normal; widows: 2;
        word-spacing: 0px; -webkit-text-stroke-width: 0px;
        background-color: rgb(255, 255, 255);"><span style="color:
          rgb(51, 51, 51); font-family: Arial, sans-serif; font-size:
          14px; font-style: normal; font-variant-ligatures: normal;
          font-variant-caps: normal; font-weight: 400; letter-spacing:
          normal; orphans: 2; text-align: start; text-indent: 0px;
          text-transform: none; white-space: normal; widows: 2;
          word-spacing: 0px; -webkit-text-stroke-width: 0px;
          background-color: rgb(255, 255, 255); text-decoration-style:
          initial; text-decoration-color: initial; display: inline
          !important; float: none;">I know other people don't follow the
          patch guidelines,<br>
        </span></a></p>
    <p><a class="external-link"
href="https://www.kernel.org/doc/html/latest/process/submitting-patches.html"
        rel="nofollow" style="color: rgb(50, 108, 166); text-decoration:
        none; font-family: Arial, sans-serif; font-size: 14px;
        font-style: normal; font-variant-ligatures: normal;
        font-variant-caps: normal; font-weight: 400; letter-spacing:
        normal; orphans: 2; text-align: start; text-indent: 0px;
        text-transform: none; white-space: normal; widows: 2;
        word-spacing: 0px; -webkit-text-stroke-width: 0px;
        background-color: rgb(255, 255, 255);"><span style="color:
          rgb(51, 51, 51); font-family: Arial, sans-serif; font-size:
          14px; font-style: normal; font-variant-ligatures: normal;
          font-variant-caps: normal; font-weight: 400; letter-spacing:
          normal; orphans: 2; text-align: start; text-indent: 0px;
          text-transform: none; white-space: normal; widows: 2;
          word-spacing: 0px; -webkit-text-stroke-width: 0px;
          background-color: rgb(255, 255, 255); text-decoration-style:
          initial; text-decoration-color: initial; display: inline
          !important; float: none;">but more info on proper commit
          message format in link.</span></a></p>
    <p><a class="external-link"
href="https://www.kernel.org/doc/html/latest/process/submitting-patches.html"
        rel="nofollow" style="color: rgb(50, 108, 166); text-decoration:
        none; font-family: Arial, sans-serif; font-size: 14px;
        font-style: normal; font-variant-ligatures: normal;
        font-variant-caps: normal; font-weight: 400; letter-spacing:
        normal; orphans: 2; text-align: start; text-indent: 0px;
        text-transform: none; white-space: normal; widows: 2;
        word-spacing: 0px; -webkit-text-stroke-width: 0px;
        background-color: rgb(255, 255, 255);"><span style="color:
          rgb(51, 51, 51); font-family: Arial, sans-serif; font-size:
          14px; font-style: normal; font-variant-ligatures: normal;
          font-variant-caps: normal; font-weight: 400; letter-spacing:
          normal; orphans: 2; text-align: start; text-indent: 0px;
          text-transform: none; white-space: normal; widows: 2;
          word-spacing: 0px; -webkit-text-stroke-width: 0px;
          background-color: rgb(255, 255, 255); text-decoration-style:
          initial; text-decoration-color: initial; display: inline
          !important; float: none;">(Don't say "this patch" or "this
          commit" or "I changed") - use imperative present tense.</span></a></p>
    <p><a class="external-link"
href="https://www.kernel.org/doc/html/latest/process/submitting-patches.html"
        rel="nofollow" style="color: rgb(50, 108, 166); text-decoration:
        none; font-family: Arial, sans-serif; font-size: 14px;
        font-style: normal; font-variant-ligatures: normal;
        font-variant-caps: normal; font-weight: 400; letter-spacing:
        normal; orphans: 2; text-align: start; text-indent: 0px;
        text-transform: none; white-space: normal; widows: 2;
        word-spacing: 0px; -webkit-text-stroke-width: 0px;
        background-color: rgb(255, 255, 255);"><span style="color:
          rgb(51, 51, 51); font-family: Arial, sans-serif; font-size:
          14px; font-style: normal; font-variant-ligatures: normal;
          font-variant-caps: normal; font-weight: 400; letter-spacing:
          normal; orphans: 2; text-align: start; text-indent: 0px;
          text-transform: none; white-space: normal; widows: 2;
          word-spacing: 0px; -webkit-text-stroke-width: 0px;
          background-color: rgb(255, 255, 255); text-decoration-style:
          initial; text-decoration-color: initial; display: inline
          !important; float: none;"></span>https://www.kernel.org/doc/html/latest/process/submitting-patches.html</a></p>
    <blockquote type="cite"
      cite="mid:20181128175312.9634-1-matheus.bernardino@usp.br">
      <pre class="moz-quote-pre" wrap="">
files at drivers/iio/adc/ and, instead, adds the proper SPDX license
identifiers.

Signed-off-by: Lucas Santos <a class="moz-txt-link-rfc2396E" href="mailto:ilucas.ms@gmail.com">&lt;ilucas.ms@gmail.com&gt;</a>
Signed-off-by: Matheus Tavares <a class="moz-txt-link-rfc2396E" href="mailto:matheus.bernardino@usp.br">&lt;matheus.bernardino@usp.br&gt;</a>
---
 drivers/iio/adc/ad7266.c             |  3 +--
 drivers/iio/adc/ad7291.c             |  3 +--
 drivers/iio/adc/ad7298.c             |  3 +--
 drivers/iio/adc/ad7766.c             |  3 +--
 drivers/iio/adc/ad7791.c             |  3 +--
 drivers/iio/adc/ad7793.c             |  3 +--
 drivers/iio/adc/ad7887.c             |  3 +--
 drivers/iio/adc/ad7923.c             |  3 +--
 drivers/iio/adc/ad799x.c             |  5 +----
 drivers/iio/adc/ad_sigma_delta.c     |  3 +--
 drivers/iio/adc/aspeed_adc.c         |  6 +-----
 drivers/iio/adc/at91-sama5d2_adc.c   | 10 +---------
 drivers/iio/adc/at91_adc.c           |  3 +--
 drivers/iio/adc/axp20x_adc.c         |  5 +----
 drivers/iio/adc/axp288_adc.c         | 13 +------------
 drivers/iio/adc/bcm_iproc_adc.c      | 13 +------------</pre>
    </blockquote>
    <p>Broadcom change:</p>
    <p>Acked-by: Scott Branden <a class="moz-txt-link-rfc2396E" href="mailto:scott.branden@broadcom.com">&lt;scott.branden@broadcom.com&gt;</a><br>
    </p>
    <blockquote type="cite"
      cite="mid:20181128175312.9634-1-matheus.bernardino@usp.br">
      <pre class="moz-quote-pre" wrap="">
 drivers/iio/adc/berlin2-adc.c        |  5 +----
 drivers/iio/adc/cc10001_adc.c        |  6 +-----
 drivers/iio/adc/cpcap-adc.c          | 10 +---------
 drivers/iio/adc/da9150-gpadc.c       |  6 +-----
 drivers/iio/adc/dln2-adc.c           |  5 +----
 drivers/iio/adc/ep93xx_adc.c         |  5 +----
 drivers/iio/adc/exynos_adc.c         | 11 +----------
 drivers/iio/adc/fsl-imx25-gcq.c      |  5 +----
 drivers/iio/adc/hi8435.c             |  6 +-----
 drivers/iio/adc/hx711.c              |  6 +-----
 drivers/iio/adc/imx7d_adc.c          |  6 +-----
 drivers/iio/adc/ina2xx-adc.c         |  7 +------
 drivers/iio/adc/lp8788_adc.c         |  5 +----
 drivers/iio/adc/lpc18xx_adc.c        |  5 +----
 drivers/iio/adc/lpc32xx_adc.c        | 15 +--------------
 drivers/iio/adc/ltc2471.c            |  3 +--
 drivers/iio/adc/ltc2485.c            |  5 +----
 drivers/iio/adc/ltc2497.c            |  3 +--
 drivers/iio/adc/max1027.c            |  5 +----
 drivers/iio/adc/max1118.c            |  5 +----
 drivers/iio/adc/max1363.c            |  5 +----
 drivers/iio/adc/mcp320x.c            |  5 +----
 drivers/iio/adc/mcp3422.c            |  6 +-----
 drivers/iio/adc/men_z188_adc.c       |  5 +----
 drivers/iio/adc/meson_saradc.c       |  5 +----
 drivers/iio/adc/mt6577_auxadc.c      | 10 +---------
 drivers/iio/adc/mxs-lradc-adc.c      | 11 +----------
 drivers/iio/adc/nau7802.c            |  3 +--
 drivers/iio/adc/palmas_gpadc.c       |  5 +----
 drivers/iio/adc/qcom-pm8xxx-xoadc.c  |  1 +
 drivers/iio/adc/qcom-spmi-iadc.c     | 10 +---------
 drivers/iio/adc/qcom-spmi-vadc.c     | 10 +---------
 drivers/iio/adc/rockchip_saradc.c    | 11 +----------
 drivers/iio/adc/spear_adc.c          |  3 +--
 drivers/iio/adc/stx104.c             | 10 +---------
 drivers/iio/adc/sun4i-gpadc-iio.c    |  5 +----
 drivers/iio/adc/ti-adc081c.c         |  5 +----
 drivers/iio/adc/ti-adc0832.c         |  5 +----
 drivers/iio/adc/ti-adc084s021.c      |  5 +----
 drivers/iio/adc/ti-adc108s102.c      | 10 +---------
 drivers/iio/adc/ti-adc12138.c        |  5 +----
 drivers/iio/adc/ti-ads1015.c         |  5 +----
 drivers/iio/adc/ti-ads8688.c         |  5 +----
 drivers/iio/adc/ti-tlc4541.c         |  5 +----
 drivers/iio/adc/ti_am335x_adc.c      | 10 +---------
 drivers/iio/adc/twl4030-madc.c       | 16 +---------------
 drivers/iio/adc/twl6030-gpadc.c      | 16 +---------------
 drivers/iio/adc/vf610_adc.c          | 15 +--------------
 drivers/iio/adc/viperboard_adc.c     |  7 +------
 drivers/iio/adc/xilinx-xadc-core.c   |  3 +--
 drivers/iio/adc/xilinx-xadc-events.c |  3 +--
 drivers/iio/adc/xilinx-xadc.h        |  3 +--
 68 files changed, 68 insertions(+), 361 deletions(-)

diff --git a/drivers/iio/adc/ad7266.c b/drivers/iio/adc/ad7266.c
index 605eb5e7e829..b538824e76cd 100644
--- a/drivers/iio/adc/ad7266.c
+++ b/drivers/iio/adc/ad7266.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * AD7266/65 SPI ADC driver
  *
  * Copyright 2012 Analog Devices Inc.
- *
- * Licensed under the GPL-2.
  */
 
 #include &lt;linux/device.h&gt;
diff --git a/drivers/iio/adc/ad7291.c b/drivers/iio/adc/ad7291.c
index a862b5d8fb4b..7bc9f2e8cd3c 100644
--- a/drivers/iio/adc/ad7291.c
+++ b/drivers/iio/adc/ad7291.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * AD7291 8-Channel, I2C, 12-Bit SAR ADC with Temperature Sensor
  *
  * Copyright 2010-2011 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
  */
 
 #include &lt;linux/device.h&gt;
diff --git a/drivers/iio/adc/ad7298.c b/drivers/iio/adc/ad7298.c
index e0220825fde0..e7ba5e29d0d6 100644
--- a/drivers/iio/adc/ad7298.c
+++ b/drivers/iio/adc/ad7298.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * AD7298 SPI ADC driver
  *
  * Copyright 2011 Analog Devices Inc.
- *
- * Licensed under the GPL-2.
  */
 
 #include &lt;linux/device.h&gt;
diff --git a/drivers/iio/adc/ad7766.c b/drivers/iio/adc/ad7766.c
index 3ae14fc8c649..ff14959f55de 100644
--- a/drivers/iio/adc/ad7766.c
+++ b/drivers/iio/adc/ad7766.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * AD7766/AD7767 SPI ADC driver
  *
  * Copyright 2016 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
  */
 
 #include &lt;linux/clk.h&gt;
diff --git a/drivers/iio/adc/ad7791.c b/drivers/iio/adc/ad7791.c
index a9ff0695ddf7..1b9ab2ef9bae 100644
--- a/drivers/iio/adc/ad7791.c
+++ b/drivers/iio/adc/ad7791.c
@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * AD7787/AD7788/AD7789/AD7790/AD7791 SPI ADC driver
  *
  * Copyright 2012 Analog Devices Inc.
  *  Author: Lars-Peter Clausen <a class="moz-txt-link-rfc2396E" href="mailto:lars@metafoo.de">&lt;lars@metafoo.de&gt;</a>
- *
- * Licensed under the GPL-2.
  */
 
 #include &lt;linux/interrupt.h&gt;
diff --git a/drivers/iio/adc/ad7793.c b/drivers/iio/adc/ad7793.c
index 4ac3ae62f56f..886263a3d2b1 100644
--- a/drivers/iio/adc/ad7793.c
+++ b/drivers/iio/adc/ad7793.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * AD7785/AD7792/AD7793/AD7794/AD7795 SPI ADC driver
  *
  * Copyright 2011-2012 Analog Devices Inc.
- *
- * Licensed under the GPL-2.
  */
 
 #include &lt;linux/interrupt.h&gt;
diff --git a/drivers/iio/adc/ad7887.c b/drivers/iio/adc/ad7887.c
index 9d4c2467d362..7c17b53dea2e 100644
--- a/drivers/iio/adc/ad7887.c
+++ b/drivers/iio/adc/ad7887.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * AD7887 SPI ADC driver
  *
  * Copyright 2010-2011 Analog Devices Inc.
- *
- * Licensed under the GPL-2.
  */
 
 #include &lt;linux/device.h&gt;
diff --git a/drivers/iio/adc/ad7923.c b/drivers/iio/adc/ad7923.c
index d62dbb62be45..cad67ee9bb38 100644
--- a/drivers/iio/adc/ad7923.c
+++ b/drivers/iio/adc/ad7923.c
@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * AD7904/AD7914/AD7923/AD7924 SPI ADC driver
  *
  * Copyright 2011 Analog Devices Inc (from AD7923 Driver)
  * Copyright 2012 CS Systemes d'Information
- *
- * Licensed under the GPL-2.
  */
 
 #include &lt;linux/device.h&gt;
diff --git a/drivers/iio/adc/ad799x.c b/drivers/iio/adc/ad799x.c
index 7a5b5d00a87d..65d60fc173aa 100644
--- a/drivers/iio/adc/ad799x.c
+++ b/drivers/iio/adc/ad799x.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * iio/adc/ad799x.c
  * Copyright (C) 2010-2011 Michael Hennerich, Analog Devices Inc.
@@ -11,10 +12,6 @@
  * based on linux/drivers/acron/char/pcf8583.c
  * Copyright (C) 2000 Russell King
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * ad799x.c
  *
  * Support for ad7991, ad7995, ad7999, ad7992, ad7993, ad7994, ad7997,
diff --git a/drivers/iio/adc/ad_sigma_delta.c b/drivers/iio/adc/ad_sigma_delta.c
index ff5f2da2e1b1..cd0c3cda132a 100644
--- a/drivers/iio/adc/ad_sigma_delta.c
+++ b/drivers/iio/adc/ad_sigma_delta.c
@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Support code for Analog Devices Sigma-Delta ADCs
  *
  * Copyright 2012 Analog Devices Inc.
  *  Author: Lars-Peter Clausen <a class="moz-txt-link-rfc2396E" href="mailto:lars@metafoo.de">&lt;lars@metafoo.de&gt;</a>
- *
- * Licensed under the GPL-2.
  */
 
 #include &lt;linux/interrupt.h&gt;
diff --git a/drivers/iio/adc/aspeed_adc.c b/drivers/iio/adc/aspeed_adc.c
index 9515ca165dfd..5eec9d2a3eb1 100644
--- a/drivers/iio/adc/aspeed_adc.c
+++ b/drivers/iio/adc/aspeed_adc.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Aspeed AST2400/2500 ADC
  *
  * Copyright (C) 2017 Google, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
  */
 
 #include &lt;linux/clk.h&gt;
diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c
index d5ea84cf6460..62ceca3fe3bf 100644
--- a/drivers/iio/adc/at91-sama5d2_adc.c
+++ b/drivers/iio/adc/at91-sama5d2_adc.c
@@ -1,17 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Atmel ADC driver for SAMA5D2 devices and compatible.
  *
  * Copyright (C) 2015 Atmel,
  *               2015 Ludovic Desroches <a class="moz-txt-link-rfc2396E" href="mailto:ludovic.desroches@atmel.com">&lt;ludovic.desroches@atmel.com&gt;</a>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
  */
 
 #include &lt;linux/bitops.h&gt;
diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 75d2f73582a3..21b07413a998 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Driver for the ADC present in the Atmel AT91 evaluation boards.
  *
  * Copyright 2011 Free Electrons
- *
- * Licensed under the GPLv2 or later.
  */
 
 #include &lt;linux/bitmap.h&gt;
diff --git a/drivers/iio/adc/axp20x_adc.c b/drivers/iio/adc/axp20x_adc.c
index 5be789269353..42eefe2593ec 100644
--- a/drivers/iio/adc/axp20x_adc.c
+++ b/drivers/iio/adc/axp20x_adc.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /* ADC driver for AXP20X and AXP22X PMICs
  *
  * Copyright (c) 2016 Free Electrons NextThing Co.
  *	Quentin Schulz <a class="moz-txt-link-rfc2396E" href="mailto:quentin.schulz@free-electrons.com">&lt;quentin.schulz@free-electrons.com&gt;</a>
- *
- * This program is free software; you can redistribute it and/or modify it under
- * the terms of the GNU General Public License version 2 as published by the
- * Free Software Foundation.
  */
 
 #include &lt;linux/completion.h&gt;
diff --git a/drivers/iio/adc/axp288_adc.c b/drivers/iio/adc/axp288_adc.c
index 031d568b4972..24c0ec2cfd67 100644
--- a/drivers/iio/adc/axp288_adc.c
+++ b/drivers/iio/adc/axp288_adc.c
@@ -1,19 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * axp288_adc.c - X-Powers AXP288 PMIC ADC Driver
  *
  * Copyright (C) 2014 Intel Corporation
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the GNU
- * General Public License for more details.
- *
  */
 
 #include &lt;linux/module.h&gt;
diff --git a/drivers/iio/adc/bcm_iproc_adc.c b/drivers/iio/adc/bcm_iproc_adc.c
index 7af59a4bbd8d..2eadef68bd49 100644
--- a/drivers/iio/adc/bcm_iproc_adc.c
+++ b/drivers/iio/adc/bcm_iproc_adc.c
@@ -1,17 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright 2016 Broadcom
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2, as
- * published by the Free Software Foundation (the "GPL").
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License version 2 (GPLv2) for more details.
- *
- * You should have received a copy of the GNU General Public License
- * version 2 (GPLv2) along with this source code.
  */
 
 #include &lt;linux/module.h&gt;
diff --git a/drivers/iio/adc/berlin2-adc.c b/drivers/iio/adc/berlin2-adc.c
index 72d8fa94ab31..3b0ca5f326ed 100644
--- a/drivers/iio/adc/berlin2-adc.c
+++ b/drivers/iio/adc/berlin2-adc.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Marvell Berlin2 ADC driver
  *
  * Copyright (C) 2015 Marvell Technology Group Ltd.
  *
  * Antoine Tenart <a class="moz-txt-link-rfc2396E" href="mailto:antoine.tenart@free-electrons.com">&lt;antoine.tenart@free-electrons.com&gt;</a>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
  */
 
 #include &lt;linux/iio/iio.h&gt;
diff --git a/drivers/iio/adc/cc10001_adc.c b/drivers/iio/adc/cc10001_adc.c
index 707d8b24b072..8b72037e04b2 100644
--- a/drivers/iio/adc/cc10001_adc.c
+++ b/drivers/iio/adc/cc10001_adc.c
@@ -1,10 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2014-2015 Imagination Technologies Ltd.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
  */
 
 #include &lt;linux/clk.h&gt;
diff --git a/drivers/iio/adc/cpcap-adc.c b/drivers/iio/adc/cpcap-adc.c
index 9ad60421d360..c1bfa4543125 100644
--- a/drivers/iio/adc/cpcap-adc.c
+++ b/drivers/iio/adc/cpcap-adc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2017 Tony Lindgren <a class="moz-txt-link-rfc2396E" href="mailto:tony@atomide.com">&lt;tony@atomide.com&gt;</a>
  *
@@ -5,15 +6,6 @@
  * earlier driver found in the Motorola Linux kernel:
  *
  * Copyright (C) 2009-2010 Motorola, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
  */
 
 #include &lt;linux/delay.h&gt;
diff --git a/drivers/iio/adc/da9150-gpadc.c b/drivers/iio/adc/da9150-gpadc.c
index 0a5d9ce79164..620274890645 100644
--- a/drivers/iio/adc/da9150-gpadc.c
+++ b/drivers/iio/adc/da9150-gpadc.c
@@ -1,14 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * DA9150 GPADC Driver
  *
  * Copyright (c) 2014 Dialog Semiconductor
  *
  * Author: Adam Thomson <a class="moz-txt-link-rfc2396E" href="mailto:Adam.Thomson.Opensource@diasemi.com">&lt;Adam.Thomson.Opensource@diasemi.com&gt;</a>
- *
- * This program is free software; you can redistribute  it and/or modify it
- * under  the terms of  the GNU General  Public License as published by the
- * Free Software Foundation;  either version 2 of the  License, or (at your
- * option) any later version.
  */
 
 #include &lt;linux/kernel.h&gt;
diff --git a/drivers/iio/adc/dln2-adc.c b/drivers/iio/adc/dln2-adc.c
index c64c6675cae6..03f0f8fc6350 100644
--- a/drivers/iio/adc/dln2-adc.c
+++ b/drivers/iio/adc/dln2-adc.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Driver for the Diolan DLN-2 USB-ADC adapter
  *
  * Copyright (c) 2017 Jack Andersen
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation, version 2.
  */
 
 #include &lt;linux/kernel.h&gt;
diff --git a/drivers/iio/adc/ep93xx_adc.c b/drivers/iio/adc/ep93xx_adc.c
index 5036c392cb20..8f614c84b643 100644
--- a/drivers/iio/adc/ep93xx_adc.c
+++ b/drivers/iio/adc/ep93xx_adc.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Driver for ADC module on the Cirrus Logic EP93xx series of SoCs
  *
  * Copyright (C) 2015 Alexander Sverdlin
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * The driver uses polling to get the conversion status. According to EP93xx
  * datasheets, reading ADCResult register starts the conversion, but user is also
  * responsible for ensuring that delay between adjacent conversion triggers is
diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c
index f10443f92e4c..9f9c186e2135 100644
--- a/drivers/iio/adc/exynos_adc.c
+++ b/drivers/iio/adc/exynos_adc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  exynos_adc.c - Support for ADC in EXYNOS SoCs
  *
@@ -5,16 +6,6 @@
  *
  *  Copyright (C) 2013 Naveen Krishna Chatradhi <a class="moz-txt-link-rfc2396E" href="mailto:ch.naveen@samsung.com">&lt;ch.naveen@samsung.com&gt;</a>
  *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
diff --git a/drivers/iio/adc/fsl-imx25-gcq.c b/drivers/iio/adc/fsl-imx25-gcq.c
index 929c617db364..e03a434b3cd5 100644
--- a/drivers/iio/adc/fsl-imx25-gcq.c
+++ b/drivers/iio/adc/fsl-imx25-gcq.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2014-2015 Pengutronix, Markus Pargmann <a class="moz-txt-link-rfc2396E" href="mailto:mpa@pengutronix.de">&lt;mpa@pengutronix.de&gt;</a>
  *
- * This program is free software; you can redistribute it and/or modify it under
- * the terms of the GNU General Public License version 2 as published by the
- * Free Software Foundation.
- *
  * This is the driver for the imx25 GCQ (Generic Conversion Queue)
  * connected to the imx25 ADC.
  */
diff --git a/drivers/iio/adc/hi8435.c b/drivers/iio/adc/hi8435.c
index 6f6c9a348158..0b6bf71af685 100644
--- a/drivers/iio/adc/hi8435.c
+++ b/drivers/iio/adc/hi8435.c
@@ -1,13 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Holt Integrated Circuits HI-8435 threshold detector driver
  *
  * Copyright (C) 2015 Zodiac Inflight Innovations
  * Copyright (C) 2015 Cogent Embedded, Inc.
- *
- * This program is free software; you can redistribute  it and/or modify it
- * under  the terms of  the GNU General  Public License as published by the
- * Free Software Foundation;  either version 2 of the  License, or (at your
- * option) any later version.
  */
 
 #include &lt;linux/delay.h&gt;
diff --git a/drivers/iio/adc/hx711.c b/drivers/iio/adc/hx711.c
index 36b59d8957fb..894d49843854 100644
--- a/drivers/iio/adc/hx711.c
+++ b/drivers/iio/adc/hx711.c
@@ -1,13 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * HX711: analog to digital converter for weight sensor module
  *
  * Copyright (c) 2016 Andreas Klinger <a class="moz-txt-link-rfc2396E" href="mailto:ak@it-klinger.de">&lt;ak@it-klinger.de&gt;</a>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
diff --git a/drivers/iio/adc/imx7d_adc.c b/drivers/iio/adc/imx7d_adc.c
index ad6764fb2a23..2f54ea1e4292 100644
--- a/drivers/iio/adc/imx7d_adc.c
+++ b/drivers/iio/adc/imx7d_adc.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Freescale i.MX7D ADC driver
  *
  * Copyright (C) 2015 Freescale Semiconductor, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #include &lt;linux/clk.h&gt;
diff --git a/drivers/iio/adc/ina2xx-adc.c b/drivers/iio/adc/ina2xx-adc.c
index bdd7cba6f6b0..9bbcca9df401 100644
--- a/drivers/iio/adc/ina2xx-adc.c
+++ b/drivers/iio/adc/ina2xx-adc.c
@@ -1,20 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * INA2XX Current and Power Monitors
  *
  * Copyright 2015 Baylibre SAS.
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * Based on linux/drivers/iio/adc/ad7291.c
  * Copyright 2010-2011 Analog Devices Inc.
  *
  * Based on linux/drivers/hwmon/ina2xx.c
  * Copyright 2012 Lothar Felten <a class="moz-txt-link-rfc2396E" href="mailto:l-felten@ti.com">&lt;l-felten@ti.com&gt;</a>
  *
- * Licensed under the GPL-2 or later.
- *
  * IIO driver for INA219-220-226-230-231
  *
  * Configurable 7-bit I2C slave address from 0x40 to 0x4F
diff --git a/drivers/iio/adc/lp8788_adc.c b/drivers/iio/adc/lp8788_adc.c
index 3bc4df916420..09dd55bff7bc 100644
--- a/drivers/iio/adc/lp8788_adc.c
+++ b/drivers/iio/adc/lp8788_adc.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * TI LP8788 MFD - ADC driver
  *
  * Copyright 2012 Texas Instruments
  *
  * Author: Milo(Woogyom) Kim <a class="moz-txt-link-rfc2396E" href="mailto:milo.kim@ti.com">&lt;milo.kim@ti.com&gt;</a>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #include &lt;linux/delay.h&gt;
diff --git a/drivers/iio/adc/lpc18xx_adc.c b/drivers/iio/adc/lpc18xx_adc.c
index 041dc4a3f66c..00d39234143d 100644
--- a/drivers/iio/adc/lpc18xx_adc.c
+++ b/drivers/iio/adc/lpc18xx_adc.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * IIO ADC driver for NXP LPC18xx ADC
  *
  * Copyright (C) 2016 Joachim Eastwood <a class="moz-txt-link-rfc2396E" href="mailto:manabian@gmail.com">&lt;manabian@gmail.com&gt;</a>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * UNSUPPORTED hardware features:
  *  - Hardware triggers
  *  - Burst mode
diff --git a/drivers/iio/adc/lpc32xx_adc.c b/drivers/iio/adc/lpc32xx_adc.c
index 20b36690fa4f..e361c1532a75 100644
--- a/drivers/iio/adc/lpc32xx_adc.c
+++ b/drivers/iio/adc/lpc32xx_adc.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  lpc32xx_adc.c - Support for ADC in LPC32XX
  *
  *  3-channel, 10-bit ADC
  *
  *  Copyright (C) 2011, 2012 Roland Stigge <a class="moz-txt-link-rfc2396E" href="mailto:stigge@antcom.de">&lt;stigge@antcom.de&gt;</a>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include &lt;linux/module.h&gt;
diff --git a/drivers/iio/adc/ltc2471.c b/drivers/iio/adc/ltc2471.c
index b88102b751cf..9d5326377676 100644
--- a/drivers/iio/adc/ltc2471.c
+++ b/drivers/iio/adc/ltc2471.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Driver for Linear Technology LTC2471 and LTC2473 voltage monitors
  * The LTC2473 is identical to the 2471, but reports a differential signal.
  *
  * Copyright (C) 2017 Topic Embedded Products
  * Author: Mike Looijmans <a class="moz-txt-link-rfc2396E" href="mailto:mike.looijmans@topic.nl">&lt;mike.looijmans@topic.nl&gt;</a>
- *
- * License: GPLv2
  */
 
 #include &lt;linux/err.h&gt;
diff --git a/drivers/iio/adc/ltc2485.c b/drivers/iio/adc/ltc2485.c
index b24c14037fd4..c0e9a7ba7af4 100644
--- a/drivers/iio/adc/ltc2485.c
+++ b/drivers/iio/adc/ltc2485.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * ltc2485.c - Driver for Linear Technology LTC2485 ADC
  *
  * Copyright (C) 2016 Alison Schofield <a class="moz-txt-link-rfc2396E" href="mailto:amsfield22@gmail.com">&lt;amsfield22@gmail.com&gt;</a>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * Datasheet: <a class="moz-txt-link-freetext" href="http://cds.linear.com/docs/en/datasheet/2485fd.pdf">http://cds.linear.com/docs/en/datasheet/2485fd.pdf</a>
  */
 
diff --git a/drivers/iio/adc/ltc2497.c b/drivers/iio/adc/ltc2497.c
index f1f7cdf66fbd..0fe12c0e3b3c 100644
--- a/drivers/iio/adc/ltc2497.c
+++ b/drivers/iio/adc/ltc2497.c
@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * ltc2497.c - Driver for Analog Devices/Linear Technology LTC2497 ADC
  *
  * Copyright (C) 2017 Analog Devices Inc.
  *
- * Licensed under the GPL-2.
- *
  * Datasheet: <a class="moz-txt-link-freetext" href="http://cds.linear.com/docs/en/datasheet/2497fd.pdf">http://cds.linear.com/docs/en/datasheet/2497fd.pdf</a>
  */
 
diff --git a/drivers/iio/adc/max1027.c b/drivers/iio/adc/max1027.c
index 311c1a89c329..af83207b2804 100644
--- a/drivers/iio/adc/max1027.c
+++ b/drivers/iio/adc/max1027.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
  /*
   * iio/adc/max1027.c
   * Copyright (C) 2014 Philippe Reynes
@@ -6,10 +7,6 @@
   * Copyright 2011 Analog Devices Inc (from AD7923 Driver)
   * Copyright 2012 CS Systemes d'Information
   *
-  * This program is free software; you can redistribute it and/or modify
-  * it under the terms of the GNU General Public License version 2 as
-  * published by the Free Software Foundation.
-  *
   * max1027.c
   *
   * Partial support for max1027 and similar chips.
diff --git a/drivers/iio/adc/max1118.c b/drivers/iio/adc/max1118.c
index 49db9e9ae625..027ee7f6f5d0 100644
--- a/drivers/iio/adc/max1118.c
+++ b/drivers/iio/adc/max1118.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * MAX1117/MAX1118/MAX1119 8-bit, dual-channel ADCs driver
  *
  * Copyright (c) 2017 Akinobu Mita <a class="moz-txt-link-rfc2396E" href="mailto:akinobu.mita@gmail.com">&lt;akinobu.mita@gmail.com&gt;</a>
  *
- * This file is subject to the terms and conditions of version 2 of
- * the GNU General Public License.  See the file COPYING in the main
- * directory of this archive for more details.
- *
  * Datasheet: <a class="moz-txt-link-freetext" href="https://datasheets.maximintegrated.com/en/ds/MAX1117-MAX1119.pdf">https://datasheets.maximintegrated.com/en/ds/MAX1117-MAX1119.pdf</a>
  *
  * SPI interface connections
diff --git a/drivers/iio/adc/max1363.c b/drivers/iio/adc/max1363.c
index a8d35aebee80..6d191ffc4c7e 100644
--- a/drivers/iio/adc/max1363.c
+++ b/drivers/iio/adc/max1363.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
  /*
   * iio/adc/max1363.c
   * Copyright (C) 2008-2010 Jonathan Cameron
@@ -9,10 +10,6 @@
   * Copyright (C) 2000 Russell King
   *
   * Driver for max1363 and similar chips.
-  *
-  * This program is free software; you can redistribute it and/or modify
-  * it under the terms of the GNU General Public License version 2 as
-  * published by the Free Software Foundation.
   */
 
 #include &lt;linux/interrupt.h&gt;
diff --git a/drivers/iio/adc/mcp320x.c b/drivers/iio/adc/mcp320x.c
index a04856d8afdb..4b873afe8e5a 100644
--- a/drivers/iio/adc/mcp320x.c
+++ b/drivers/iio/adc/mcp320x.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2013 Oskar Andero <a class="moz-txt-link-rfc2396E" href="mailto:oskar.andero@gmail.com">&lt;oskar.andero@gmail.com&gt;</a>
  * Copyright (C) 2014 Rose Technology
@@ -34,10 +35,6 @@
  * <a class="moz-txt-link-freetext" href="http://ww1.microchip.com/downloads/en/DeviceDoc/21298c.pdf">http://ww1.microchip.com/downloads/en/DeviceDoc/21298c.pdf</a>  mcp3204/08
  * <a class="moz-txt-link-freetext" href="http://ww1.microchip.com/downloads/en/DeviceDoc/21700E.pdf">http://ww1.microchip.com/downloads/en/DeviceDoc/21700E.pdf</a>  mcp3301
  * <a class="moz-txt-link-freetext" href="http://ww1.microchip.com/downloads/en/DeviceDoc/21950D.pdf">http://ww1.microchip.com/downloads/en/DeviceDoc/21950D.pdf</a>  mcp3550/1/3
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #include &lt;linux/err.h&gt;
diff --git a/drivers/iio/adc/mcp3422.c b/drivers/iio/adc/mcp3422.c
index 819f26011500..c8232ba24667 100644
--- a/drivers/iio/adc/mcp3422.c
+++ b/drivers/iio/adc/mcp3422.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * mcp3422.c - driver for the Microchip mcp3421/2/3/4/5/6/7/8 chip family
  *
@@ -10,11 +11,6 @@
  *
  * This driver exports the value of analog input voltage to sysfs, the
  * voltage unit is nV.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #include &lt;linux/err.h&gt;
diff --git a/drivers/iio/adc/men_z188_adc.c b/drivers/iio/adc/men_z188_adc.c
index c80261748d8f..0cb809bf1730 100644
--- a/drivers/iio/adc/men_z188_adc.c
+++ b/drivers/iio/adc/men_z188_adc.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * MEN 16z188 Analog to Digial Converter
  *
  * Copyright (C) 2014 MEN Mikroelektronik GmbH (<a class="moz-txt-link-abbreviated" href="http://www.men.de">www.men.de</a>)
  * Author: Johannes Thumshirn <a class="moz-txt-link-rfc2396E" href="mailto:johannes.thumshirn@men.de">&lt;johannes.thumshirn@men.de&gt;</a>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; version 2 of the License.
  */
 
 #include &lt;linux/kernel.h&gt;
diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index 729becb2d3d9..f5299c9bdbde 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Amlogic Meson Successive Approximation Register (SAR) A/D Converter
  *
  * Copyright (C) 2017 Martin Blumenstingl <a class="moz-txt-link-rfc2396E" href="mailto:martin.blumenstingl@googlemail.com">&lt;martin.blumenstingl@googlemail.com&gt;</a>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * You should have received a copy of the GNU General Public License
  * along with this program. If not, see <a class="moz-txt-link-rfc2396E" href="http://www.gnu.org/licenses/">&lt;http://www.gnu.org/licenses/&gt;</a>.
  */
diff --git a/drivers/iio/adc/mt6577_auxadc.c b/drivers/iio/adc/mt6577_auxadc.c
index 95d76abb64ec..cba0e47c6013 100644
--- a/drivers/iio/adc/mt6577_auxadc.c
+++ b/drivers/iio/adc/mt6577_auxadc.c
@@ -1,15 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2016 MediaTek Inc.
  * Author: Zhiyong Tao <a class="moz-txt-link-rfc2396E" href="mailto:zhiyong.tao@mediatek.com">&lt;zhiyong.tao@mediatek.com&gt;</a>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include &lt;linux/clk.h&gt;
diff --git a/drivers/iio/adc/mxs-lradc-adc.c b/drivers/iio/adc/mxs-lradc-adc.c
index c627513d9f0f..80983334e5c2 100644
--- a/drivers/iio/adc/mxs-lradc-adc.c
+++ b/drivers/iio/adc/mxs-lradc-adc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Freescale MXS LRADC ADC driver
  *
@@ -7,16 +8,6 @@
  * Authors:
  *  Marek Vasut <a class="moz-txt-link-rfc2396E" href="mailto:marex@denx.de">&lt;marex@denx.de&gt;</a>
  *  Ksenija Stanojevic <a class="moz-txt-link-rfc2396E" href="mailto:ksenija.stanojevic@gmail.com">&lt;ksenija.stanojevic@gmail.com&gt;</a>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
  */
 
 #include &lt;linux/completion.h&gt;
diff --git a/drivers/iio/adc/nau7802.c b/drivers/iio/adc/nau7802.c
index 8997e74a8847..4e53a63e5fb9 100644
--- a/drivers/iio/adc/nau7802.c
+++ b/drivers/iio/adc/nau7802.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Driver for the Nuvoton NAU7802 ADC
  *
  * Copyright 2013 Free Electrons
- *
- * Licensed under the GPLv2 or later.
  */
 
 #include &lt;linux/delay.h&gt;
diff --git a/drivers/iio/adc/palmas_gpadc.c b/drivers/iio/adc/palmas_gpadc.c
index 69b9affeef1e..45d1bf1253d7 100644
--- a/drivers/iio/adc/palmas_gpadc.c
+++ b/drivers/iio/adc/palmas_gpadc.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * palmas-adc.c -- TI PALMAS GPADC.
  *
  * Copyright (c) 2013, NVIDIA Corporation. All rights reserved.
  *
  * Author: Pradeep Goudagunta <a class="moz-txt-link-rfc2396E" href="mailto:pgoudagunta@nvidia.com">&lt;pgoudagunta@nvidia.com&gt;</a>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation version 2.
  */
 
 #include &lt;linux/module.h&gt;
diff --git a/drivers/iio/adc/qcom-pm8xxx-xoadc.c b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
index c30c002f1fef..648136ed1f85 100644
--- a/drivers/iio/adc/qcom-pm8xxx-xoadc.c
+++ b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Qualcomm PM8xxx PMIC XOADC driver
  *
diff --git a/drivers/iio/adc/qcom-spmi-iadc.c b/drivers/iio/adc/qcom-spmi-iadc.c
index 3f062cd61aba..a8402a47c8e4 100644
--- a/drivers/iio/adc/qcom-spmi-iadc.c
+++ b/drivers/iio/adc/qcom-spmi-iadc.c
@@ -1,14 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include &lt;linux/bitops.h&gt;
diff --git a/drivers/iio/adc/qcom-spmi-vadc.c b/drivers/iio/adc/qcom-spmi-vadc.c
index 3680e0d47412..f3e8fdee39d8 100644
--- a/drivers/iio/adc/qcom-spmi-vadc.c
+++ b/drivers/iio/adc/qcom-spmi-vadc.c
@@ -1,14 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include &lt;linux/bitops.h&gt;
diff --git a/drivers/iio/adc/rockchip_saradc.c b/drivers/iio/adc/rockchip_saradc.c
index 1f98566d5b3c..234c6df348ce 100644
--- a/drivers/iio/adc/rockchip_saradc.c
+++ b/drivers/iio/adc/rockchip_saradc.c
@@ -1,16 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Rockchip Successive Approximation Register (SAR) A/D Converter
  * Copyright (C) 2014 ROCKCHIP, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include &lt;linux/module.h&gt;
diff --git a/drivers/iio/adc/spear_adc.c b/drivers/iio/adc/spear_adc.c
index b1da2c46107c..009019a39bba 100644
--- a/drivers/iio/adc/spear_adc.c
+++ b/drivers/iio/adc/spear_adc.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * ST SPEAr ADC driver
  *
  * Copyright 2012 Stefan Roese <a class="moz-txt-link-rfc2396E" href="mailto:sr@denx.de">&lt;sr@denx.de&gt;</a>
- *
- * Licensed under the GPL-2.
  */
 
 #include &lt;linux/module.h&gt;
diff --git a/drivers/iio/adc/stx104.c b/drivers/iio/adc/stx104.c
index 0662ca199eb0..f9d0aaae836f 100644
--- a/drivers/iio/adc/stx104.c
+++ b/drivers/iio/adc/stx104.c
@@ -1,15 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * IIO driver for the Apex Embedded Systems STX104
  * Copyright (C) 2016 William Breathitt Gray
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2, as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 #include &lt;linux/bitops.h&gt;
 #include &lt;linux/device.h&gt;
diff --git a/drivers/iio/adc/sun4i-gpadc-iio.c b/drivers/iio/adc/sun4i-gpadc-iio.c
index 04d7147e0110..f13c6248a662 100644
--- a/drivers/iio/adc/sun4i-gpadc-iio.c
+++ b/drivers/iio/adc/sun4i-gpadc-iio.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /* ADC driver for sunxi platforms' (A10, A13 and A31) GPADC
  *
  * Copyright (c) 2016 Quentin Schulz <a class="moz-txt-link-rfc2396E" href="mailto:quentin.schulz@free-electrons.com">&lt;quentin.schulz@free-electrons.com&gt;</a>
  *
- * This program is free software; you can redistribute it and/or modify it under
- * the terms of the GNU General Public License version 2 as published by the
- * Free Software Foundation.
- *
  * The Allwinner SoCs all have an ADC that can also act as a touchscreen
  * controller and a thermal sensor.
  * The thermal sensor works only when the ADC acts as a touchscreen controller
diff --git a/drivers/iio/adc/ti-adc081c.c b/drivers/iio/adc/ti-adc081c.c
index 405e3779c0c5..92c7584298f6 100644
--- a/drivers/iio/adc/ti-adc081c.c
+++ b/drivers/iio/adc/ti-adc081c.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * TI ADC081C/ADC101C/ADC121C 8/10/12-bit ADC driver
  *
  * Copyright (C) 2012 Avionic Design GmbH
  * Copyright (C) 2016 Intel
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * Datasheets:
  *	<a class="moz-txt-link-freetext" href="http://www.ti.com/lit/ds/symlink/adc081c021.pdf">http://www.ti.com/lit/ds/symlink/adc081c021.pdf</a>
  *	<a class="moz-txt-link-freetext" href="http://www.ti.com/lit/ds/symlink/adc101c021.pdf">http://www.ti.com/lit/ds/symlink/adc101c021.pdf</a>
diff --git a/drivers/iio/adc/ti-adc0832.c b/drivers/iio/adc/ti-adc0832.c
index 188dae705bf7..482a00dc9273 100644
--- a/drivers/iio/adc/ti-adc0832.c
+++ b/drivers/iio/adc/ti-adc0832.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * ADC0831/ADC0832/ADC0834/ADC0838 8-bit ADC driver
  *
  * Copyright (c) 2016 Akinobu Mita <a class="moz-txt-link-rfc2396E" href="mailto:akinobu.mita@gmail.com">&lt;akinobu.mita@gmail.com&gt;</a>
  *
- * This file is subject to the terms and conditions of version 2 of
- * the GNU General Public License.  See the file COPYING in the main
- * directory of this archive for more details.
- *
  * Datasheet: <a class="moz-txt-link-freetext" href="http://www.ti.com/lit/ds/symlink/adc0832-n.pdf">http://www.ti.com/lit/ds/symlink/adc0832-n.pdf</a>
  */
 
diff --git a/drivers/iio/adc/ti-adc084s021.c b/drivers/iio/adc/ti-adc084s021.c
index 25504640e126..914d097c8758 100644
--- a/drivers/iio/adc/ti-adc084s021.c
+++ b/drivers/iio/adc/ti-adc084s021.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /**
  * Copyright (C) 2017 Axis Communications AB
  *
  * Driver for Texas Instruments' ADC084S021 ADC chip.
  * Datasheets can be found here:
  * <a class="moz-txt-link-freetext" href="http://www.ti.com/lit/ds/symlink/adc084s021.pdf">http://www.ti.com/lit/ds/symlink/adc084s021.pdf</a>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #include &lt;linux/err.h&gt;
diff --git a/drivers/iio/adc/ti-adc108s102.c b/drivers/iio/adc/ti-adc108s102.c
index 841203edaac5..a1c16199e7cc 100644
--- a/drivers/iio/adc/ti-adc108s102.c
+++ b/drivers/iio/adc/ti-adc108s102.c
@@ -1,18 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * TI ADC108S102 SPI ADC driver
  *
  * Copyright (c) 2013-2015 Intel Corporation.
  * Copyright (c) 2017 Siemens AG
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
  * This IIO device driver is designed to work with the following
  * analog to digital converters from Texas Instruments:
  *  ADC108S102
diff --git a/drivers/iio/adc/ti-adc12138.c b/drivers/iio/adc/ti-adc12138.c
index 703d68ae96b7..9445b79ad7b8 100644
--- a/drivers/iio/adc/ti-adc12138.c
+++ b/drivers/iio/adc/ti-adc12138.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * ADC12130/ADC12132/ADC12138 12-bit plus sign ADC driver
  *
  * Copyright (c) 2016 Akinobu Mita <a class="moz-txt-link-rfc2396E" href="mailto:akinobu.mita@gmail.com">&lt;akinobu.mita@gmail.com&gt;</a>
  *
- * This file is subject to the terms and conditions of version 2 of
- * the GNU General Public License.  See the file COPYING in the main
- * directory of this archive for more details.
- *
  * Datasheet: <a class="moz-txt-link-freetext" href="http://www.ti.com/lit/ds/symlink/adc12138.pdf">http://www.ti.com/lit/ds/symlink/adc12138.pdf</a>
  */
 
diff --git a/drivers/iio/adc/ti-ads1015.c b/drivers/iio/adc/ti-ads1015.c
index 6a114dcb4a3a..cddb41a3919c 100644
--- a/drivers/iio/adc/ti-ads1015.c
+++ b/drivers/iio/adc/ti-ads1015.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * ADS1015 - Texas Instruments Analog-to-Digital Converter
  *
  * Copyright (c) 2016, Intel Corporation.
  *
- * This file is subject to the terms and conditions of version 2 of
- * the GNU General Public License.  See the file COPYING in the main
- * directory of this archive for more details.
- *
  * IIO driver for ADS1015 ADC 7-bit I2C slave address:
  *	* 0x48 - ADDR connected to Ground
  *	* 0x49 - ADDR connected to Vdd
diff --git a/drivers/iio/adc/ti-ads8688.c b/drivers/iio/adc/ti-ads8688.c
index 184d686ebd99..83d99a79f79e 100644
--- a/drivers/iio/adc/ti-ads8688.c
+++ b/drivers/iio/adc/ti-ads8688.c
@@ -1,9 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2015 Prevas A/S
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #include &lt;linux/device.h&gt;
diff --git a/drivers/iio/adc/ti-tlc4541.c b/drivers/iio/adc/ti-tlc4541.c
index 2290024c89fc..945d547302c6 100644
--- a/drivers/iio/adc/ti-tlc4541.c
+++ b/drivers/iio/adc/ti-tlc4541.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * TI tlc4541 ADC Driver
  *
@@ -7,10 +8,6 @@
  * <a class="moz-txt-link-freetext" href="http://www.ti.com/lit/gpn/tlc3541">http://www.ti.com/lit/gpn/tlc3541</a>
  * <a class="moz-txt-link-freetext" href="http://www.ti.com/lit/gpn/tlc4541">http://www.ti.com/lit/gpn/tlc4541</a>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * The tlc4541 requires 24 clock cycles to start a transfer.
  * Conversion then takes 2.94us to complete before data is ready
  * Data is returned MSB first.
diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index cafb1dcadc48..aac5a1959b78 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * TI ADC MFD driver
  *
  * Copyright (C) 2012 Texas Instruments Incorporated - <a class="moz-txt-link-freetext" href="http://www.ti.com/">http://www.ti.com/</a>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation version 2.
- *
- * This program is distributed "as is" WITHOUT ANY WARRANTY of any
- * kind, whether express or implied; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include &lt;linux/kernel.h&gt;
diff --git a/drivers/iio/adc/twl4030-madc.c b/drivers/iio/adc/twl4030-madc.c
index 8c019bb6625f..d3ea08f8d33d 100644
--- a/drivers/iio/adc/twl4030-madc.c
+++ b/drivers/iio/adc/twl4030-madc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *
  * TWL4030 MADC module driver-This driver monitors the real time
@@ -12,21 +13,6 @@
  * Mikko Ylinen <a class="moz-txt-link-rfc2396E" href="mailto:mikko.k.ylinen@nokia.com">&lt;mikko.k.ylinen@nokia.com&gt;</a>
  *
  * Amit Kucheria <a class="moz-txt-link-rfc2396E" href="mailto:amit.kucheria@canonical.com">&lt;amit.kucheria@canonical.com&gt;</a>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
  */
 
 #include &lt;linux/device.h&gt;
diff --git a/drivers/iio/adc/twl6030-gpadc.c b/drivers/iio/adc/twl6030-gpadc.c
index e470510e76ea..201027839c1e 100644
--- a/drivers/iio/adc/twl6030-gpadc.c
+++ b/drivers/iio/adc/twl6030-gpadc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * TWL6030 GPADC module driver
  *
@@ -12,21 +13,6 @@
  * Based on twl4030-madc.c
  * Copyright (C) 2008 Nokia Corporation
  * Mikko Ylinen <a class="moz-txt-link-rfc2396E" href="mailto:mikko.k.ylinen@nokia.com">&lt;mikko.k.ylinen@nokia.com&gt;</a>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
  */
 #include &lt;linux/interrupt.h&gt;
 #include &lt;linux/kernel.h&gt;
diff --git a/drivers/iio/adc/vf610_adc.c b/drivers/iio/adc/vf610_adc.c
index bbcb7a4d7edf..a9d13b8b9a68 100644
--- a/drivers/iio/adc/vf610_adc.c
+++ b/drivers/iio/adc/vf610_adc.c
@@ -1,21 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Freescale Vybrid vf610 ADC driver
  *
  * Copyright 2013 Freescale Semiconductor, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include &lt;linux/module.h&gt;
diff --git a/drivers/iio/adc/viperboard_adc.c b/drivers/iio/adc/viperboard_adc.c
index 53eb5a4136fe..5b64a5ea488f 100644
--- a/drivers/iio/adc/viperboard_adc.c
+++ b/drivers/iio/adc/viperboard_adc.c
@@ -1,15 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Nano River Technologies viperboard IIO ADC driver
  *
  *  (C) 2012 by Lemonage GmbH
  *  Author: Lars Poeschel <a class="moz-txt-link-rfc2396E" href="mailto:poeschel@lemonage.de">&lt;poeschel@lemonage.de&gt;</a>
  *  All rights reserved.
- *
- *  This program is free software; you can redistribute  it and/or modify it
- *  under  the terms of  the GNU General  Public License as published by the
- *  Free Software Foundation;  either version 2 of the	License, or (at your
- *  option) any later version.
- *
  */
 
 #include &lt;linux/kernel.h&gt;
diff --git a/drivers/iio/adc/xilinx-xadc-core.c b/drivers/iio/adc/xilinx-xadc-core.c
index 3f6be5ac049a..b7b5adf6c9fc 100644
--- a/drivers/iio/adc/xilinx-xadc-core.c
+++ b/drivers/iio/adc/xilinx-xadc-core.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Xilinx XADC driver
  *
  * Copyright 2013-2014 Analog Devices Inc.
  *  Author: Lars-Peter Clauen <a class="moz-txt-link-rfc2396E" href="mailto:lars@metafoo.de">&lt;lars@metafoo.de&gt;</a>
  *
- * Licensed under the GPL-2.
- *
  * Documentation for the parts can be found at:
  *  - XADC hardmacro: Xilinx UG480
  *  - ZYNQ XADC interface: Xilinx UG585
diff --git a/drivers/iio/adc/xilinx-xadc-events.c b/drivers/iio/adc/xilinx-xadc-events.c
index dc0670308253..0c81ad4f0a05 100644
--- a/drivers/iio/adc/xilinx-xadc-events.c
+++ b/drivers/iio/adc/xilinx-xadc-events.c
@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Xilinx XADC driver
  *
  * Copyright 2013 Analog Devices Inc.
  *  Author: Lars-Peter Clauen <a class="moz-txt-link-rfc2396E" href="mailto:lars@metafoo.de">&lt;lars@metafoo.de&gt;</a>
- *
- * Licensed under the GPL-2.
  */
 
 #include &lt;linux/iio/events.h&gt;
diff --git a/drivers/iio/adc/xilinx-xadc.h b/drivers/iio/adc/xilinx-xadc.h
index 8c0009585c16..5b9042e7441d 100644
--- a/drivers/iio/adc/xilinx-xadc.h
+++ b/drivers/iio/adc/xilinx-xadc.h
@@ -1,10 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Xilinx XADC driver
  *
  * Copyright 2013 Analog Devices Inc.
  *  Author: Lars-Peter Clauen <a class="moz-txt-link-rfc2396E" href="mailto:lars@metafoo.de">&lt;lars@metafoo.de&gt;</a>
- *
- * Licensed under the GPL-2.
  */
 
 #ifndef __IIO_XILINX_XADC__
</pre>
    </blockquote>
  </body>
</html>
Alexandre Belloni Nov. 28, 2018, 7:29 p.m. UTC | #2
Hello,

On 28/11/2018 15:53:12-0200, Matheus Tavares wrote:
> diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c
> index f10443f92e4c..9f9c186e2135 100644
> --- a/drivers/iio/adc/exynos_adc.c
> +++ b/drivers/iio/adc/exynos_adc.c
> @@ -1,3 +1,4 @@
> +// SPDX-License-Identifier: GPL-2.0+
>  /*
>   *  exynos_adc.c - Support for ADC in EXYNOS SoCs
>   *
> @@ -5,16 +6,6 @@
>   *
>   *  Copyright (C) 2013 Naveen Krishna Chatradhi <ch.naveen@samsung.com>
>   *
> - *  This program is free software; you can redistribute it and/or modify
> - *  it under the terms of the GNU General Public License as published by
> - *  the Free Software Foundation; either version 2 of the License, or
> - *  (at your option) any later version.
> - *
> - *  This program is distributed in the hope that it will be useful,
> - *  but WITHOUT ANY WARRANTY; without even the implied warranty of
> - *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> - *  GNU General Public License for more details.
> - *
>   *  You should have received a copy of the GNU General Public License
>   *  along with this program; if not, write to the Free Software
>   *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

You forgot to remove some of the boilerplate here.

> diff --git a/drivers/iio/adc/hx711.c b/drivers/iio/adc/hx711.c
> index 36b59d8957fb..894d49843854 100644
> --- a/drivers/iio/adc/hx711.c
> +++ b/drivers/iio/adc/hx711.c
> @@ -1,13 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0+
>  /*
>   * HX711: analog to digital converter for weight sensor module
>   *
>   * Copyright (c) 2016 Andreas Klinger <ak@it-klinger.de>
>   *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License as published by
> - * the Free Software Foundation; either version 2 of the License, or
> - * (at your option) any later version.
> - *
>   * This program is distributed in the hope that it will be useful,
>   * but WITHOUT ANY WARRANTY; without even the implied warranty of
>   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

and here

> diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
> index 729becb2d3d9..f5299c9bdbde 100644
> --- a/drivers/iio/adc/meson_saradc.c
> +++ b/drivers/iio/adc/meson_saradc.c
> @@ -1,12 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0
>  /*
>   * Amlogic Meson Successive Approximation Register (SAR) A/D Converter
>   *
>   * Copyright (C) 2017 Martin Blumenstingl <martin.blumenstingl@googlemail.com>
>   *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - *
>   * You should have received a copy of the GNU General Public License
>   * along with this program. If not, see <http://www.gnu.org/licenses/>.

and here.

>   */
Vladimir Zapolskiy Nov. 28, 2018, 10:20 p.m. UTC | #3
On 11/28/2018 07:53 PM, Matheus Tavares wrote:
> From: Lucas Santos <ilucas.ms@gmail.com>
> 
> This patch removes all license boilerplate texts from the .c and .h
> files at drivers/iio/adc/ and, instead, adds the proper SPDX license
> identifiers.
> 
> Signed-off-by: Lucas Santos <ilucas.ms@gmail.com>
> Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>

[snip]

> diff --git a/drivers/iio/adc/lpc18xx_adc.c b/drivers/iio/adc/lpc18xx_adc.c
> index 041dc4a3f66c..00d39234143d 100644
> --- a/drivers/iio/adc/lpc18xx_adc.c
> +++ b/drivers/iio/adc/lpc18xx_adc.c
> @@ -1,12 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0
>  /*
>   * IIO ADC driver for NXP LPC18xx ADC
>   *
>   * Copyright (C) 2016 Joachim Eastwood <manabian@gmail.com>
>   *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - *
>   * UNSUPPORTED hardware features:
>   *  - Hardware triggers
>   *  - Burst mode
> diff --git a/drivers/iio/adc/lpc32xx_adc.c b/drivers/iio/adc/lpc32xx_adc.c
> index 20b36690fa4f..e361c1532a75 100644
> --- a/drivers/iio/adc/lpc32xx_adc.c
> +++ b/drivers/iio/adc/lpc32xx_adc.c
> @@ -1,23 +1,10 @@
> +// SPDX-License-Identifier: GPL-2.0+
>  /*
>   *  lpc32xx_adc.c - Support for ADC in LPC32XX
>   *
>   *  3-channel, 10-bit ADC
>   *
>   *  Copyright (C) 2011, 2012 Roland Stigge <stigge@antcom.de>
> - *
> - *  This program is free software; you can redistribute it and/or modify
> - *  it under the terms of the GNU General Public License as published by
> - *  the Free Software Foundation; either version 2 of the License, or
> - *  (at your option) any later version.
> - *
> - *  This program is distributed in the hope that it will be useful,
> - *  but WITHOUT ANY WARRANTY; without even the implied warranty of
> - *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> - *  GNU General Public License for more details.
> - *
> - *  You should have received a copy of the GNU General Public License
> - *  along with this program; if not, write to the Free Software
> - *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
>   */
>  
>  #include <linux/module.h>

For lpc18xx/lpc32xx:

Acked-by: Vladimir Zapolskiy <vz@mleia.com>

--
Best wishes,
Vladimir
William Breathitt Gray Nov. 28, 2018, 11:03 p.m. UTC | #4
On Wed, Nov 28, 2018 at 03:53:12PM -0200, Matheus Tavares wrote:
> From: Lucas Santos <ilucas.ms@gmail.com>
> 
> This patch removes all license boilerplate texts from the .c and .h
> files at drivers/iio/adc/ and, instead, adds the proper SPDX license
> identifiers.
> 
> Signed-off-by: Lucas Santos <ilucas.ms@gmail.com>
> Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
> ---
>  drivers/iio/adc/ad7266.c             |  3 +--
>  drivers/iio/adc/ad7291.c             |  3 +--
>  drivers/iio/adc/ad7298.c             |  3 +--
>  drivers/iio/adc/ad7766.c             |  3 +--
>  drivers/iio/adc/ad7791.c             |  3 +--
>  drivers/iio/adc/ad7793.c             |  3 +--
>  drivers/iio/adc/ad7887.c             |  3 +--
>  drivers/iio/adc/ad7923.c             |  3 +--
>  drivers/iio/adc/ad799x.c             |  5 +----
>  drivers/iio/adc/ad_sigma_delta.c     |  3 +--
>  drivers/iio/adc/aspeed_adc.c         |  6 +-----
>  drivers/iio/adc/at91-sama5d2_adc.c   | 10 +---------
>  drivers/iio/adc/at91_adc.c           |  3 +--
>  drivers/iio/adc/axp20x_adc.c         |  5 +----
>  drivers/iio/adc/axp288_adc.c         | 13 +------------
>  drivers/iio/adc/bcm_iproc_adc.c      | 13 +------------
>  drivers/iio/adc/berlin2-adc.c        |  5 +----
>  drivers/iio/adc/cc10001_adc.c        |  6 +-----
>  drivers/iio/adc/cpcap-adc.c          | 10 +---------
>  drivers/iio/adc/da9150-gpadc.c       |  6 +-----
>  drivers/iio/adc/dln2-adc.c           |  5 +----
>  drivers/iio/adc/ep93xx_adc.c         |  5 +----
>  drivers/iio/adc/exynos_adc.c         | 11 +----------
>  drivers/iio/adc/fsl-imx25-gcq.c      |  5 +----
>  drivers/iio/adc/hi8435.c             |  6 +-----
>  drivers/iio/adc/hx711.c              |  6 +-----
>  drivers/iio/adc/imx7d_adc.c          |  6 +-----
>  drivers/iio/adc/ina2xx-adc.c         |  7 +------
>  drivers/iio/adc/lp8788_adc.c         |  5 +----
>  drivers/iio/adc/lpc18xx_adc.c        |  5 +----
>  drivers/iio/adc/lpc32xx_adc.c        | 15 +--------------
>  drivers/iio/adc/ltc2471.c            |  3 +--
>  drivers/iio/adc/ltc2485.c            |  5 +----
>  drivers/iio/adc/ltc2497.c            |  3 +--
>  drivers/iio/adc/max1027.c            |  5 +----
>  drivers/iio/adc/max1118.c            |  5 +----
>  drivers/iio/adc/max1363.c            |  5 +----
>  drivers/iio/adc/mcp320x.c            |  5 +----
>  drivers/iio/adc/mcp3422.c            |  6 +-----
>  drivers/iio/adc/men_z188_adc.c       |  5 +----
>  drivers/iio/adc/meson_saradc.c       |  5 +----
>  drivers/iio/adc/mt6577_auxadc.c      | 10 +---------
>  drivers/iio/adc/mxs-lradc-adc.c      | 11 +----------
>  drivers/iio/adc/nau7802.c            |  3 +--
>  drivers/iio/adc/palmas_gpadc.c       |  5 +----
>  drivers/iio/adc/qcom-pm8xxx-xoadc.c  |  1 +
>  drivers/iio/adc/qcom-spmi-iadc.c     | 10 +---------
>  drivers/iio/adc/qcom-spmi-vadc.c     | 10 +---------
>  drivers/iio/adc/rockchip_saradc.c    | 11 +----------
>  drivers/iio/adc/spear_adc.c          |  3 +--
>  drivers/iio/adc/stx104.c             | 10 +---------
>  drivers/iio/adc/sun4i-gpadc-iio.c    |  5 +----
>  drivers/iio/adc/ti-adc081c.c         |  5 +----
>  drivers/iio/adc/ti-adc0832.c         |  5 +----
>  drivers/iio/adc/ti-adc084s021.c      |  5 +----
>  drivers/iio/adc/ti-adc108s102.c      | 10 +---------
>  drivers/iio/adc/ti-adc12138.c        |  5 +----
>  drivers/iio/adc/ti-ads1015.c         |  5 +----
>  drivers/iio/adc/ti-ads8688.c         |  5 +----
>  drivers/iio/adc/ti-tlc4541.c         |  5 +----
>  drivers/iio/adc/ti_am335x_adc.c      | 10 +---------
>  drivers/iio/adc/twl4030-madc.c       | 16 +---------------
>  drivers/iio/adc/twl6030-gpadc.c      | 16 +---------------
>  drivers/iio/adc/vf610_adc.c          | 15 +--------------
>  drivers/iio/adc/viperboard_adc.c     |  7 +------
>  drivers/iio/adc/xilinx-xadc-core.c   |  3 +--
>  drivers/iio/adc/xilinx-xadc-events.c |  3 +--
>  drivers/iio/adc/xilinx-xadc.h        |  3 +--
>  68 files changed, 68 insertions(+), 361 deletions(-)
> 
> diff --git a/drivers/iio/adc/stx104.c b/drivers/iio/adc/stx104.c
> index 0662ca199eb0..f9d0aaae836f 100644
> --- a/drivers/iio/adc/stx104.c
> +++ b/drivers/iio/adc/stx104.c
> @@ -1,15 +1,7 @@
> +// SPDX-License-Identifier: GPL-2.0
>  /*
>   * IIO driver for the Apex Embedded Systems STX104
>   * Copyright (C) 2016 William Breathitt Gray
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License, version 2, as
> - * published by the Free Software Foundation.
> - *
> - * This program is distributed in the hope that it will be useful, but
> - * WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> - * General Public License for more details.
>   */
>  #include <linux/bitops.h>
>  #include <linux/device.h>

For stx104.c:

Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Krzysztof Kozlowski Nov. 29, 2018, 7:37 a.m. UTC | #5
On Wed, 28 Nov 2018 at 18:53, Matheus Tavares <matheus.bernardino@usp.br> wrote:
>
> From: Lucas Santos <ilucas.ms@gmail.com>
>
> This patch removes all license boilerplate texts from the .c and .h
> files at drivers/iio/adc/ and, instead, adds the proper SPDX license
> identifiers.
>
> Signed-off-by: Lucas Santos <ilucas.ms@gmail.com>
> Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
> ---
>  drivers/iio/adc/ad7266.c             |  3 +--
>  drivers/iio/adc/ad7291.c             |  3 +--
>  drivers/iio/adc/ad7298.c             |  3 +--
>  drivers/iio/adc/ad7766.c             |  3 +--
>  drivers/iio/adc/ad7791.c             |  3 +--
>  drivers/iio/adc/ad7793.c             |  3 +--
>  drivers/iio/adc/ad7887.c             |  3 +--
>  drivers/iio/adc/ad7923.c             |  3 +--
>  drivers/iio/adc/ad799x.c             |  5 +----
>  drivers/iio/adc/ad_sigma_delta.c     |  3 +--
>  drivers/iio/adc/aspeed_adc.c         |  6 +-----
>  drivers/iio/adc/at91-sama5d2_adc.c   | 10 +---------
>  drivers/iio/adc/at91_adc.c           |  3 +--
>  drivers/iio/adc/axp20x_adc.c         |  5 +----
>  drivers/iio/adc/axp288_adc.c         | 13 +------------
>  drivers/iio/adc/bcm_iproc_adc.c      | 13 +------------
>  drivers/iio/adc/berlin2-adc.c        |  5 +----
>  drivers/iio/adc/cc10001_adc.c        |  6 +-----
>  drivers/iio/adc/cpcap-adc.c          | 10 +---------
>  drivers/iio/adc/da9150-gpadc.c       |  6 +-----
>  drivers/iio/adc/dln2-adc.c           |  5 +----
>  drivers/iio/adc/ep93xx_adc.c         |  5 +----
>  drivers/iio/adc/exynos_adc.c         | 11 +----------
>  drivers/iio/adc/fsl-imx25-gcq.c      |  5 +----
>  drivers/iio/adc/hi8435.c             |  6 +-----
>  drivers/iio/adc/hx711.c              |  6 +-----
>  drivers/iio/adc/imx7d_adc.c          |  6 +-----
>  drivers/iio/adc/ina2xx-adc.c         |  7 +------
>  drivers/iio/adc/lp8788_adc.c         |  5 +----
>  drivers/iio/adc/lpc18xx_adc.c        |  5 +----
>  drivers/iio/adc/lpc32xx_adc.c        | 15 +--------------
>  drivers/iio/adc/ltc2471.c            |  3 +--
>  drivers/iio/adc/ltc2485.c            |  5 +----
>  drivers/iio/adc/ltc2497.c            |  3 +--
>  drivers/iio/adc/max1027.c            |  5 +----
>  drivers/iio/adc/max1118.c            |  5 +----
>  drivers/iio/adc/max1363.c            |  5 +----
>  drivers/iio/adc/mcp320x.c            |  5 +----
>  drivers/iio/adc/mcp3422.c            |  6 +-----
>  drivers/iio/adc/men_z188_adc.c       |  5 +----
>  drivers/iio/adc/meson_saradc.c       |  5 +----
>  drivers/iio/adc/mt6577_auxadc.c      | 10 +---------
>  drivers/iio/adc/mxs-lradc-adc.c      | 11 +----------
>  drivers/iio/adc/nau7802.c            |  3 +--
>  drivers/iio/adc/palmas_gpadc.c       |  5 +----
>  drivers/iio/adc/qcom-pm8xxx-xoadc.c  |  1 +
>  drivers/iio/adc/qcom-spmi-iadc.c     | 10 +---------
>  drivers/iio/adc/qcom-spmi-vadc.c     | 10 +---------
>  drivers/iio/adc/rockchip_saradc.c    | 11 +----------
>  drivers/iio/adc/spear_adc.c          |  3 +--
>  drivers/iio/adc/stx104.c             | 10 +---------
>  drivers/iio/adc/sun4i-gpadc-iio.c    |  5 +----
>  drivers/iio/adc/ti-adc081c.c         |  5 +----
>  drivers/iio/adc/ti-adc0832.c         |  5 +----
>  drivers/iio/adc/ti-adc084s021.c      |  5 +----
>  drivers/iio/adc/ti-adc108s102.c      | 10 +---------
>  drivers/iio/adc/ti-adc12138.c        |  5 +----
>  drivers/iio/adc/ti-ads1015.c         |  5 +----
>  drivers/iio/adc/ti-ads8688.c         |  5 +----
>  drivers/iio/adc/ti-tlc4541.c         |  5 +----
>  drivers/iio/adc/ti_am335x_adc.c      | 10 +---------
>  drivers/iio/adc/twl4030-madc.c       | 16 +---------------
>  drivers/iio/adc/twl6030-gpadc.c      | 16 +---------------
>  drivers/iio/adc/vf610_adc.c          | 15 +--------------
>  drivers/iio/adc/viperboard_adc.c     |  7 +------
>  drivers/iio/adc/xilinx-xadc-core.c   |  3 +--
>  drivers/iio/adc/xilinx-xadc-events.c |  3 +--
>  drivers/iio/adc/xilinx-xadc.h        |  3 +--
>  68 files changed, 68 insertions(+), 361 deletions(-)
>

(...)

> diff --git a/drivers/iio/adc/ep93xx_adc.c b/drivers/iio/adc/ep93xx_adc.c
> index 5036c392cb20..8f614c84b643 100644
> --- a/drivers/iio/adc/ep93xx_adc.c
> +++ b/drivers/iio/adc/ep93xx_adc.c
> @@ -1,12 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0
>  /*
>   * Driver for ADC module on the Cirrus Logic EP93xx series of SoCs
>   *
>   * Copyright (C) 2015 Alexander Sverdlin
>   *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - *
>   * The driver uses polling to get the conversion status. According to EP93xx
>   * datasheets, reading ADCResult register starts the conversion, but user is also
>   * responsible for ensuring that delay between adjacent conversion triggers is
> diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c
> index f10443f92e4c..9f9c186e2135 100644
> --- a/drivers/iio/adc/exynos_adc.c
> +++ b/drivers/iio/adc/exynos_adc.c
> @@ -1,3 +1,4 @@
> +// SPDX-License-Identifier: GPL-2.0+
>  /*
>   *  exynos_adc.c - Support for ADC in EXYNOS SoCs
>   *
> @@ -5,16 +6,6 @@
>   *
>   *  Copyright (C) 2013 Naveen Krishna Chatradhi <ch.naveen@samsung.com>
>   *
> - *  This program is free software; you can redistribute it and/or modify
> - *  it under the terms of the GNU General Public License as published by
> - *  the Free Software Foundation; either version 2 of the License, or
> - *  (at your option) any later version.
> - *
> - *  This program is distributed in the hope that it will be useful,
> - *  but WITHOUT ANY WARRANTY; without even the implied warranty of
> - *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> - *  GNU General Public License for more details.
> - *
>   *  You should have received a copy of the GNU General Public License
>   *  along with this program; if not, write to the Free Software
>   *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

The paragraph about writing to FSF should also go away, especially it
is discouraged at first place (see checkpatch).

Best regards,
Krzysztof
Heiko Stuebner Nov. 29, 2018, 1:18 p.m. UTC | #6
Am Mittwoch, 28. November 2018, 18:53:12 CET schrieb Matheus Tavares:
> From: Lucas Santos <ilucas.ms@gmail.com>
> 
> This patch removes all license boilerplate texts from the .c and .h
> files at drivers/iio/adc/ and, instead, adds the proper SPDX license
> identifiers.
> 
> Signed-off-by: Lucas Santos <ilucas.ms@gmail.com>
> Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
> ---

> diff --git a/drivers/iio/adc/rockchip_saradc.c b/drivers/iio/adc/rockchip_saradc.c
> index 1f98566d5b3c..234c6df348ce 100644
> --- a/drivers/iio/adc/rockchip_saradc.c
> +++ b/drivers/iio/adc/rockchip_saradc.c
> @@ -1,16 +1,7 @@
> +// SPDX-License-Identifier: GPL-2.0+
>  /*
>   * Rockchip Successive Approximation Register (SAR) A/D Converter
>   * Copyright (C) 2014 ROCKCHIP, Inc.
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License as published by
> - * the Free Software Foundation; either version 2 of the License, or
> - * (at your option) any later version.
> - *
> - * This program is distributed in the hope that it will be useful,
> - * but WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> - * GNU General Public License for more details.
>   */
>  
>  #include <linux/module.h>

For the Rockchip-part
Acked-by: Heiko Stuebner <heiko@sntech.de>
Matheus Tavares Bernardino Dec. 1, 2018, 3:54 p.m. UTC | #7
On Wed, Nov 28, 2018 at 4:54 PM Scott Branden
<scott.branden@broadcom.com> wrote:
>>
>>
>> On 2018-11-28 9:53 a.m., Matheus Tavares wrote:
>>
>> From: Lucas Santos <ilucas.ms@gmail.com>
>>
>> This patch removes all license boilerplate texts from the .c and .h
>>
> I know other people don't follow the patch guidelines,
>
> but more info on proper commit message format in link.
>
> (Don't say "this patch" or "this commit" or "I changed") - use imperative present tense.
>
> https://www.kernel.org/doc/html/latest/process/submitting-patches.html
>

Ok, thanks for the review. I'll correct that in v2.

Matheus
Matheus Tavares Bernardino Dec. 1, 2018, 3:56 p.m. UTC | #8
Thanks for the review! I will fix those places.

Matheus

On Wed, Nov 28, 2018 at 5:29 PM Alexandre Belloni
<alexandre.belloni@bootlin.com> wrote:
>
> Hello,
>
> On 28/11/2018 15:53:12-0200, Matheus Tavares wrote:
> > diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c
> > index f10443f92e4c..9f9c186e2135 100644
> > --- a/drivers/iio/adc/exynos_adc.c
> > +++ b/drivers/iio/adc/exynos_adc.c
> > @@ -1,3 +1,4 @@
> > +// SPDX-License-Identifier: GPL-2.0+
> >  /*
> >   *  exynos_adc.c - Support for ADC in EXYNOS SoCs
> >   *
> > @@ -5,16 +6,6 @@
> >   *
> >   *  Copyright (C) 2013 Naveen Krishna Chatradhi <ch.naveen@samsung.com>
> >   *
> > - *  This program is free software; you can redistribute it and/or modify
> > - *  it under the terms of the GNU General Public License as published by
> > - *  the Free Software Foundation; either version 2 of the License, or
> > - *  (at your option) any later version.
> > - *
> > - *  This program is distributed in the hope that it will be useful,
> > - *  but WITHOUT ANY WARRANTY; without even the implied warranty of
> > - *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> > - *  GNU General Public License for more details.
> > - *
> >   *  You should have received a copy of the GNU General Public License
> >   *  along with this program; if not, write to the Free Software
> >   *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
>
> You forgot to remove some of the boilerplate here.
>
> > diff --git a/drivers/iio/adc/hx711.c b/drivers/iio/adc/hx711.c
> > index 36b59d8957fb..894d49843854 100644
> > --- a/drivers/iio/adc/hx711.c
> > +++ b/drivers/iio/adc/hx711.c
> > @@ -1,13 +1,9 @@
> > +// SPDX-License-Identifier: GPL-2.0+
> >  /*
> >   * HX711: analog to digital converter for weight sensor module
> >   *
> >   * Copyright (c) 2016 Andreas Klinger <ak@it-klinger.de>
> >   *
> > - * This program is free software; you can redistribute it and/or modify
> > - * it under the terms of the GNU General Public License as published by
> > - * the Free Software Foundation; either version 2 of the License, or
> > - * (at your option) any later version.
> > - *
> >   * This program is distributed in the hope that it will be useful,
> >   * but WITHOUT ANY WARRANTY; without even the implied warranty of
> >   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>
> and here
>
> > diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
> > index 729becb2d3d9..f5299c9bdbde 100644
> > --- a/drivers/iio/adc/meson_saradc.c
> > +++ b/drivers/iio/adc/meson_saradc.c
> > @@ -1,12 +1,9 @@
> > +// SPDX-License-Identifier: GPL-2.0
> >  /*
> >   * Amlogic Meson Successive Approximation Register (SAR) A/D Converter
> >   *
> >   * Copyright (C) 2017 Martin Blumenstingl <martin.blumenstingl@googlemail.com>
> >   *
> > - * This program is free software; you can redistribute it and/or modify
> > - * it under the terms of the GNU General Public License version 2 as
> > - * published by the Free Software Foundation.
> > - *
> >   * You should have received a copy of the GNU General Public License
> >   * along with this program. If not, see <http://www.gnu.org/licenses/>.
>
> and here.
>
> >   */
>
> --
> Alexandre Belloni, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com
>
> --
> You received this message because you are subscribed to the Google Groups "Kernel USP" group.
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> For more options, visit https://groups.google.com/d/optout.
Matheus Tavares Bernardino Dec. 1, 2018, 3:57 p.m. UTC | #9
On Thu, Nov 29, 2018 at 5:37 AM Krzysztof Kozlowski <krzk@kernel.org> wrote:
>
> On Wed, 28 Nov 2018 at 18:53, Matheus Tavares <matheus.bernardino@usp.br> wrote:
> >
> > From: Lucas Santos <ilucas.ms@gmail.com>
> >
> > This patch removes all license boilerplate texts from the .c and .h
> > files at drivers/iio/adc/ and, instead, adds the proper SPDX license
> > identifiers.
> >
> > Signed-off-by: Lucas Santos <ilucas.ms@gmail.com>
> > Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
> > ---
> >  drivers/iio/adc/ad7266.c             |  3 +--
> >  drivers/iio/adc/ad7291.c             |  3 +--
> >  drivers/iio/adc/ad7298.c             |  3 +--
> >  drivers/iio/adc/ad7766.c             |  3 +--
> >  drivers/iio/adc/ad7791.c             |  3 +--
> >  drivers/iio/adc/ad7793.c             |  3 +--
> >  drivers/iio/adc/ad7887.c             |  3 +--
> >  drivers/iio/adc/ad7923.c             |  3 +--
> >  drivers/iio/adc/ad799x.c             |  5 +----
> >  drivers/iio/adc/ad_sigma_delta.c     |  3 +--
> >  drivers/iio/adc/aspeed_adc.c         |  6 +-----
> >  drivers/iio/adc/at91-sama5d2_adc.c   | 10 +---------
> >  drivers/iio/adc/at91_adc.c           |  3 +--
> >  drivers/iio/adc/axp20x_adc.c         |  5 +----
> >  drivers/iio/adc/axp288_adc.c         | 13 +------------
> >  drivers/iio/adc/bcm_iproc_adc.c      | 13 +------------
> >  drivers/iio/adc/berlin2-adc.c        |  5 +----
> >  drivers/iio/adc/cc10001_adc.c        |  6 +-----
> >  drivers/iio/adc/cpcap-adc.c          | 10 +---------
> >  drivers/iio/adc/da9150-gpadc.c       |  6 +-----
> >  drivers/iio/adc/dln2-adc.c           |  5 +----
> >  drivers/iio/adc/ep93xx_adc.c         |  5 +----
> >  drivers/iio/adc/exynos_adc.c         | 11 +----------
> >  drivers/iio/adc/fsl-imx25-gcq.c      |  5 +----
> >  drivers/iio/adc/hi8435.c             |  6 +-----
> >  drivers/iio/adc/hx711.c              |  6 +-----
> >  drivers/iio/adc/imx7d_adc.c          |  6 +-----
> >  drivers/iio/adc/ina2xx-adc.c         |  7 +------
> >  drivers/iio/adc/lp8788_adc.c         |  5 +----
> >  drivers/iio/adc/lpc18xx_adc.c        |  5 +----
> >  drivers/iio/adc/lpc32xx_adc.c        | 15 +--------------
> >  drivers/iio/adc/ltc2471.c            |  3 +--
> >  drivers/iio/adc/ltc2485.c            |  5 +----
> >  drivers/iio/adc/ltc2497.c            |  3 +--
> >  drivers/iio/adc/max1027.c            |  5 +----
> >  drivers/iio/adc/max1118.c            |  5 +----
> >  drivers/iio/adc/max1363.c            |  5 +----
> >  drivers/iio/adc/mcp320x.c            |  5 +----
> >  drivers/iio/adc/mcp3422.c            |  6 +-----
> >  drivers/iio/adc/men_z188_adc.c       |  5 +----
> >  drivers/iio/adc/meson_saradc.c       |  5 +----
> >  drivers/iio/adc/mt6577_auxadc.c      | 10 +---------
> >  drivers/iio/adc/mxs-lradc-adc.c      | 11 +----------
> >  drivers/iio/adc/nau7802.c            |  3 +--
> >  drivers/iio/adc/palmas_gpadc.c       |  5 +----
> >  drivers/iio/adc/qcom-pm8xxx-xoadc.c  |  1 +
> >  drivers/iio/adc/qcom-spmi-iadc.c     | 10 +---------
> >  drivers/iio/adc/qcom-spmi-vadc.c     | 10 +---------
> >  drivers/iio/adc/rockchip_saradc.c    | 11 +----------
> >  drivers/iio/adc/spear_adc.c          |  3 +--
> >  drivers/iio/adc/stx104.c             | 10 +---------
> >  drivers/iio/adc/sun4i-gpadc-iio.c    |  5 +----
> >  drivers/iio/adc/ti-adc081c.c         |  5 +----
> >  drivers/iio/adc/ti-adc0832.c         |  5 +----
> >  drivers/iio/adc/ti-adc084s021.c      |  5 +----
> >  drivers/iio/adc/ti-adc108s102.c      | 10 +---------
> >  drivers/iio/adc/ti-adc12138.c        |  5 +----
> >  drivers/iio/adc/ti-ads1015.c         |  5 +----
> >  drivers/iio/adc/ti-ads8688.c         |  5 +----
> >  drivers/iio/adc/ti-tlc4541.c         |  5 +----
> >  drivers/iio/adc/ti_am335x_adc.c      | 10 +---------
> >  drivers/iio/adc/twl4030-madc.c       | 16 +---------------
> >  drivers/iio/adc/twl6030-gpadc.c      | 16 +---------------
> >  drivers/iio/adc/vf610_adc.c          | 15 +--------------
> >  drivers/iio/adc/viperboard_adc.c     |  7 +------
> >  drivers/iio/adc/xilinx-xadc-core.c   |  3 +--
> >  drivers/iio/adc/xilinx-xadc-events.c |  3 +--
> >  drivers/iio/adc/xilinx-xadc.h        |  3 +--
> >  68 files changed, 68 insertions(+), 361 deletions(-)
> >
>
> (...)
>
> > diff --git a/drivers/iio/adc/ep93xx_adc.c b/drivers/iio/adc/ep93xx_adc.c
> > index 5036c392cb20..8f614c84b643 100644
> > --- a/drivers/iio/adc/ep93xx_adc.c
> > +++ b/drivers/iio/adc/ep93xx_adc.c
> > @@ -1,12 +1,9 @@
> > +// SPDX-License-Identifier: GPL-2.0
> >  /*
> >   * Driver for ADC module on the Cirrus Logic EP93xx series of SoCs
> >   *
> >   * Copyright (C) 2015 Alexander Sverdlin
> >   *
> > - * This program is free software; you can redistribute it and/or modify
> > - * it under the terms of the GNU General Public License version 2 as
> > - * published by the Free Software Foundation.
> > - *
> >   * The driver uses polling to get the conversion status. According to EP93xx
> >   * datasheets, reading ADCResult register starts the conversion, but user is also
> >   * responsible for ensuring that delay between adjacent conversion triggers is
> > diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c
> > index f10443f92e4c..9f9c186e2135 100644
> > --- a/drivers/iio/adc/exynos_adc.c
> > +++ b/drivers/iio/adc/exynos_adc.c
> > @@ -1,3 +1,4 @@
> > +// SPDX-License-Identifier: GPL-2.0+
> >  /*
> >   *  exynos_adc.c - Support for ADC in EXYNOS SoCs
> >   *
> > @@ -5,16 +6,6 @@
> >   *
> >   *  Copyright (C) 2013 Naveen Krishna Chatradhi <ch.naveen@samsung.com>
> >   *
> > - *  This program is free software; you can redistribute it and/or modify
> > - *  it under the terms of the GNU General Public License as published by
> > - *  the Free Software Foundation; either version 2 of the License, or
> > - *  (at your option) any later version.
> > - *
> > - *  This program is distributed in the hope that it will be useful,
> > - *  but WITHOUT ANY WARRANTY; without even the implied warranty of
> > - *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> > - *  GNU General Public License for more details.
> > - *
> >   *  You should have received a copy of the GNU General Public License
> >   *  along with this program; if not, write to the Free Software
> >   *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
>
> The paragraph about writing to FSF should also go away, especially it
> is discouraged at first place (see checkpatch).
>

Nice catch! Thanks,
Matheus

> Best regards,
> Krzysztof
Jonathan Cameron Dec. 1, 2018, 4:55 p.m. UTC | #10
On Wed, 28 Nov 2018 15:53:12 -0200
Matheus Tavares <matheus.bernardino@usp.br> wrote:

> From: Lucas Santos <ilucas.ms@gmail.com>
> 
> This patch removes all license boilerplate texts from the .c and .h
> files at drivers/iio/adc/ and, instead, adds the proper SPDX license
> identifiers.
> 
> Signed-off-by: Lucas Santos <ilucas.ms@gmail.com>
> Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
Hi Lucas, Matheus,

Doing this as a large all at once patch may seem like a good idea, but...

Whilst it is now kernel policy (sort of) to use SPDX, that doesn't
correspond to converting all code without input from the original
authors.

As such, I am normally only happy to apply SPDX patches with an
ack from either the original author, or at least someone from the
company who holds the copyright.

I have expressed before that I actually consider these mostly
noise and so am not keen at all unless there is other work
being done on a particular driver.

So please split this up into at least separate patches
for each of the copyright holders, so they can provide an ACK
if they are happy with this change.

Some companies will for example want their legal departments to
do a review of whether SPDX is acceptable for their past contributions.
(lots won't care btw - but the potential is there).

+CC Linus Walleij as one of his files doesn't have a license...

A few other comments inline...

Thanks,

Jonathan

> ---
>  drivers/iio/adc/ad7266.c             |  3 +--
>  drivers/iio/adc/ad7291.c             |  3 +--
>  drivers/iio/adc/ad7298.c             |  3 +--
>  drivers/iio/adc/ad7766.c             |  3 +--
>  drivers/iio/adc/ad7791.c             |  3 +--
>  drivers/iio/adc/ad7793.c             |  3 +--
>  drivers/iio/adc/ad7887.c             |  3 +--
>  drivers/iio/adc/ad7923.c             |  3 +--
>  drivers/iio/adc/ad799x.c             |  5 +----
>  drivers/iio/adc/ad_sigma_delta.c     |  3 +--
>  drivers/iio/adc/aspeed_adc.c         |  6 +-----
>  drivers/iio/adc/at91-sama5d2_adc.c   | 10 +---------
>  drivers/iio/adc/at91_adc.c           |  3 +--
>  drivers/iio/adc/axp20x_adc.c         |  5 +----
>  drivers/iio/adc/axp288_adc.c         | 13 +------------
>  drivers/iio/adc/bcm_iproc_adc.c      | 13 +------------
>  drivers/iio/adc/berlin2-adc.c        |  5 +----
>  drivers/iio/adc/cc10001_adc.c        |  6 +-----
>  drivers/iio/adc/cpcap-adc.c          | 10 +---------
>  drivers/iio/adc/da9150-gpadc.c       |  6 +-----
>  drivers/iio/adc/dln2-adc.c           |  5 +----
>  drivers/iio/adc/ep93xx_adc.c         |  5 +----
>  drivers/iio/adc/exynos_adc.c         | 11 +----------
>  drivers/iio/adc/fsl-imx25-gcq.c      |  5 +----
>  drivers/iio/adc/hi8435.c             |  6 +-----
>  drivers/iio/adc/hx711.c              |  6 +-----
>  drivers/iio/adc/imx7d_adc.c          |  6 +-----
>  drivers/iio/adc/ina2xx-adc.c         |  7 +------
>  drivers/iio/adc/lp8788_adc.c         |  5 +----
>  drivers/iio/adc/lpc18xx_adc.c        |  5 +----
>  drivers/iio/adc/lpc32xx_adc.c        | 15 +--------------
>  drivers/iio/adc/ltc2471.c            |  3 +--
>  drivers/iio/adc/ltc2485.c            |  5 +----
>  drivers/iio/adc/ltc2497.c            |  3 +--
>  drivers/iio/adc/max1027.c            |  5 +----
>  drivers/iio/adc/max1118.c            |  5 +----
>  drivers/iio/adc/max1363.c            |  5 +----
>  drivers/iio/adc/mcp320x.c            |  5 +----
>  drivers/iio/adc/mcp3422.c            |  6 +-----
>  drivers/iio/adc/men_z188_adc.c       |  5 +----
>  drivers/iio/adc/meson_saradc.c       |  5 +----
>  drivers/iio/adc/mt6577_auxadc.c      | 10 +---------
>  drivers/iio/adc/mxs-lradc-adc.c      | 11 +----------
>  drivers/iio/adc/nau7802.c            |  3 +--
>  drivers/iio/adc/palmas_gpadc.c       |  5 +----
>  drivers/iio/adc/qcom-pm8xxx-xoadc.c  |  1 +
>  drivers/iio/adc/qcom-spmi-iadc.c     | 10 +---------
>  drivers/iio/adc/qcom-spmi-vadc.c     | 10 +---------
>  drivers/iio/adc/rockchip_saradc.c    | 11 +----------
>  drivers/iio/adc/spear_adc.c          |  3 +--
>  drivers/iio/adc/stx104.c             | 10 +---------
>  drivers/iio/adc/sun4i-gpadc-iio.c    |  5 +----
>  drivers/iio/adc/ti-adc081c.c         |  5 +----
>  drivers/iio/adc/ti-adc0832.c         |  5 +----
>  drivers/iio/adc/ti-adc084s021.c      |  5 +----
>  drivers/iio/adc/ti-adc108s102.c      | 10 +---------
>  drivers/iio/adc/ti-adc12138.c        |  5 +----
>  drivers/iio/adc/ti-ads1015.c         |  5 +----
>  drivers/iio/adc/ti-ads8688.c         |  5 +----
>  drivers/iio/adc/ti-tlc4541.c         |  5 +----
>  drivers/iio/adc/ti_am335x_adc.c      | 10 +---------
>  drivers/iio/adc/twl4030-madc.c       | 16 +---------------
>  drivers/iio/adc/twl6030-gpadc.c      | 16 +---------------
>  drivers/iio/adc/vf610_adc.c          | 15 +--------------
>  drivers/iio/adc/viperboard_adc.c     |  7 +------
>  drivers/iio/adc/xilinx-xadc-core.c   |  3 +--
>  drivers/iio/adc/xilinx-xadc-events.c |  3 +--
>  drivers/iio/adc/xilinx-xadc.h        |  3 +--
>  68 files changed, 68 insertions(+), 361 deletions(-)
> 
...

> diff --git a/drivers/iio/adc/ina2xx-adc.c b/drivers/iio/adc/ina2xx-adc.c
> index bdd7cba6f6b0..9bbcca9df401 100644
> --- a/drivers/iio/adc/ina2xx-adc.c
> +++ b/drivers/iio/adc/ina2xx-adc.c
> @@ -1,20 +1,15 @@
> +// SPDX-License-Identifier: GPL-2.0+
Oh great, contradictory license text.   The first
part would normally imply GPL-2.0 and the second
is clearly GPL-2.0+

I'd leave this one be unless you can get input from the various
authors.

>  /*
>   * INA2XX Current and Power Monitors
>   *
>   * Copyright 2015 Baylibre SAS.
>   *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - *
>   * Based on linux/drivers/iio/adc/ad7291.c
>   * Copyright 2010-2011 Analog Devices Inc.
>   *
>   * Based on linux/drivers/hwmon/ina2xx.c
>   * Copyright 2012 Lothar Felten <l-felten@ti.com>
>   *
> - * Licensed under the GPL-2 or later.
> - *
>   * IIO driver for INA219-220-226-230-231
>   *
>   * Configurable 7-bit I2C slave address from 0x40 to 0x4F


...

> diff --git a/drivers/iio/adc/max1363.c b/drivers/iio/adc/max1363.c
> index a8d35aebee80..6d191ffc4c7e 100644
> --- a/drivers/iio/adc/max1363.c
> +++ b/drivers/iio/adc/max1363.c
> @@ -1,3 +1,4 @@
> +// SPDX-License-Identifier: GPL-2.0
>   /*
>    * iio/adc/max1363.c
>    * Copyright (C) 2008-2010 Jonathan Cameron
> @@ -9,10 +10,6 @@
>    * Copyright (C) 2000 Russell King
>    *
>    * Driver for max1363 and similar chips.
> -  *
> -  * This program is free software; you can redistribute it and/or modify
> -  * it under the terms of the GNU General Public License version 2 as
> -  * published by the Free Software Foundation.
>    */

This one's mine so in a separate patch you can add.

Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

> diff --git a/drivers/iio/adc/qcom-pm8xxx-xoadc.c b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
> index c30c002f1fef..648136ed1f85 100644
> --- a/drivers/iio/adc/qcom-pm8xxx-xoadc.c
> +++ b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
> @@ -1,3 +1,4 @@
> +// SPDX-License-Identifier: GPL-2.0

Oh goody.  A file with out a license.  oops.
Thankfully an author we can easily get hold of!
Linus, what should it be?

>  /*
>   * Qualcomm PM8xxx PMIC XOADC driver
>   *
Linus Walleij Dec. 7, 2018, 10:16 a.m. UTC | #11
On Sat, Dec 1, 2018 at 5:56 PM Jonathan Cameron <jic23@kernel.org> wrote:

> +CC Linus Walleij as one of his files doesn't have a license...

Sorry about that. I am fine with GPL-2.0 or GPL-2.0+ on
any of "my" files. Feel free to add it with my Acked-by.

Yours,
Linus Walleij

Patch
diff mbox series

diff --git a/drivers/iio/adc/ad7266.c b/drivers/iio/adc/ad7266.c
index 605eb5e7e829..b538824e76cd 100644
--- a/drivers/iio/adc/ad7266.c
+++ b/drivers/iio/adc/ad7266.c
@@ -1,9 +1,8 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * AD7266/65 SPI ADC driver
  *
  * Copyright 2012 Analog Devices Inc.
- *
- * Licensed under the GPL-2.
  */
 
 #include <linux/device.h>
diff --git a/drivers/iio/adc/ad7291.c b/drivers/iio/adc/ad7291.c
index a862b5d8fb4b..7bc9f2e8cd3c 100644
--- a/drivers/iio/adc/ad7291.c
+++ b/drivers/iio/adc/ad7291.c
@@ -1,9 +1,8 @@ 
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * AD7291 8-Channel, I2C, 12-Bit SAR ADC with Temperature Sensor
  *
  * Copyright 2010-2011 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
  */
 
 #include <linux/device.h>
diff --git a/drivers/iio/adc/ad7298.c b/drivers/iio/adc/ad7298.c
index e0220825fde0..e7ba5e29d0d6 100644
--- a/drivers/iio/adc/ad7298.c
+++ b/drivers/iio/adc/ad7298.c
@@ -1,9 +1,8 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * AD7298 SPI ADC driver
  *
  * Copyright 2011 Analog Devices Inc.
- *
- * Licensed under the GPL-2.
  */
 
 #include <linux/device.h>
diff --git a/drivers/iio/adc/ad7766.c b/drivers/iio/adc/ad7766.c
index 3ae14fc8c649..ff14959f55de 100644
--- a/drivers/iio/adc/ad7766.c
+++ b/drivers/iio/adc/ad7766.c
@@ -1,9 +1,8 @@ 
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * AD7766/AD7767 SPI ADC driver
  *
  * Copyright 2016 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
  */
 
 #include <linux/clk.h>
diff --git a/drivers/iio/adc/ad7791.c b/drivers/iio/adc/ad7791.c
index a9ff0695ddf7..1b9ab2ef9bae 100644
--- a/drivers/iio/adc/ad7791.c
+++ b/drivers/iio/adc/ad7791.c
@@ -1,10 +1,9 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * AD7787/AD7788/AD7789/AD7790/AD7791 SPI ADC driver
  *
  * Copyright 2012 Analog Devices Inc.
  *  Author: Lars-Peter Clausen <lars@metafoo.de>
- *
- * Licensed under the GPL-2.
  */
 
 #include <linux/interrupt.h>
diff --git a/drivers/iio/adc/ad7793.c b/drivers/iio/adc/ad7793.c
index 4ac3ae62f56f..886263a3d2b1 100644
--- a/drivers/iio/adc/ad7793.c
+++ b/drivers/iio/adc/ad7793.c
@@ -1,9 +1,8 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * AD7785/AD7792/AD7793/AD7794/AD7795 SPI ADC driver
  *
  * Copyright 2011-2012 Analog Devices Inc.
- *
- * Licensed under the GPL-2.
  */
 
 #include <linux/interrupt.h>
diff --git a/drivers/iio/adc/ad7887.c b/drivers/iio/adc/ad7887.c
index 9d4c2467d362..7c17b53dea2e 100644
--- a/drivers/iio/adc/ad7887.c
+++ b/drivers/iio/adc/ad7887.c
@@ -1,9 +1,8 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * AD7887 SPI ADC driver
  *
  * Copyright 2010-2011 Analog Devices Inc.
- *
- * Licensed under the GPL-2.
  */
 
 #include <linux/device.h>
diff --git a/drivers/iio/adc/ad7923.c b/drivers/iio/adc/ad7923.c
index d62dbb62be45..cad67ee9bb38 100644
--- a/drivers/iio/adc/ad7923.c
+++ b/drivers/iio/adc/ad7923.c
@@ -1,10 +1,9 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * AD7904/AD7914/AD7923/AD7924 SPI ADC driver
  *
  * Copyright 2011 Analog Devices Inc (from AD7923 Driver)
  * Copyright 2012 CS Systemes d'Information
- *
- * Licensed under the GPL-2.
  */
 
 #include <linux/device.h>
diff --git a/drivers/iio/adc/ad799x.c b/drivers/iio/adc/ad799x.c
index 7a5b5d00a87d..65d60fc173aa 100644
--- a/drivers/iio/adc/ad799x.c
+++ b/drivers/iio/adc/ad799x.c
@@ -1,3 +1,4 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * iio/adc/ad799x.c
  * Copyright (C) 2010-2011 Michael Hennerich, Analog Devices Inc.
@@ -11,10 +12,6 @@ 
  * based on linux/drivers/acron/char/pcf8583.c
  * Copyright (C) 2000 Russell King
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * ad799x.c
  *
  * Support for ad7991, ad7995, ad7999, ad7992, ad7993, ad7994, ad7997,
diff --git a/drivers/iio/adc/ad_sigma_delta.c b/drivers/iio/adc/ad_sigma_delta.c
index ff5f2da2e1b1..cd0c3cda132a 100644
--- a/drivers/iio/adc/ad_sigma_delta.c
+++ b/drivers/iio/adc/ad_sigma_delta.c
@@ -1,10 +1,9 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Support code for Analog Devices Sigma-Delta ADCs
  *
  * Copyright 2012 Analog Devices Inc.
  *  Author: Lars-Peter Clausen <lars@metafoo.de>
- *
- * Licensed under the GPL-2.
  */
 
 #include <linux/interrupt.h>
diff --git a/drivers/iio/adc/aspeed_adc.c b/drivers/iio/adc/aspeed_adc.c
index 9515ca165dfd..5eec9d2a3eb1 100644
--- a/drivers/iio/adc/aspeed_adc.c
+++ b/drivers/iio/adc/aspeed_adc.c
@@ -1,12 +1,8 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Aspeed AST2400/2500 ADC
  *
  * Copyright (C) 2017 Google, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
  */
 
 #include <linux/clk.h>
diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c
index d5ea84cf6460..62ceca3fe3bf 100644
--- a/drivers/iio/adc/at91-sama5d2_adc.c
+++ b/drivers/iio/adc/at91-sama5d2_adc.c
@@ -1,17 +1,9 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Atmel ADC driver for SAMA5D2 devices and compatible.
  *
  * Copyright (C) 2015 Atmel,
  *               2015 Ludovic Desroches <ludovic.desroches@atmel.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
  */
 
 #include <linux/bitops.h>
diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 75d2f73582a3..21b07413a998 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -1,9 +1,8 @@ 
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Driver for the ADC present in the Atmel AT91 evaluation boards.
  *
  * Copyright 2011 Free Electrons
- *
- * Licensed under the GPLv2 or later.
  */
 
 #include <linux/bitmap.h>
diff --git a/drivers/iio/adc/axp20x_adc.c b/drivers/iio/adc/axp20x_adc.c
index 5be789269353..42eefe2593ec 100644
--- a/drivers/iio/adc/axp20x_adc.c
+++ b/drivers/iio/adc/axp20x_adc.c
@@ -1,11 +1,8 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /* ADC driver for AXP20X and AXP22X PMICs
  *
  * Copyright (c) 2016 Free Electrons NextThing Co.
  *	Quentin Schulz <quentin.schulz@free-electrons.com>
- *
- * This program is free software; you can redistribute it and/or modify it under
- * the terms of the GNU General Public License version 2 as published by the
- * Free Software Foundation.
  */
 
 #include <linux/completion.h>
diff --git a/drivers/iio/adc/axp288_adc.c b/drivers/iio/adc/axp288_adc.c
index 031d568b4972..24c0ec2cfd67 100644
--- a/drivers/iio/adc/axp288_adc.c
+++ b/drivers/iio/adc/axp288_adc.c
@@ -1,19 +1,8 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * axp288_adc.c - X-Powers AXP288 PMIC ADC Driver
  *
  * Copyright (C) 2014 Intel Corporation
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the GNU
- * General Public License for more details.
- *
  */
 
 #include <linux/module.h>
diff --git a/drivers/iio/adc/bcm_iproc_adc.c b/drivers/iio/adc/bcm_iproc_adc.c
index 7af59a4bbd8d..2eadef68bd49 100644
--- a/drivers/iio/adc/bcm_iproc_adc.c
+++ b/drivers/iio/adc/bcm_iproc_adc.c
@@ -1,17 +1,6 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright 2016 Broadcom
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2, as
- * published by the Free Software Foundation (the "GPL").
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License version 2 (GPLv2) for more details.
- *
- * You should have received a copy of the GNU General Public License
- * version 2 (GPLv2) along with this source code.
  */
 
 #include <linux/module.h>
diff --git a/drivers/iio/adc/berlin2-adc.c b/drivers/iio/adc/berlin2-adc.c
index 72d8fa94ab31..3b0ca5f326ed 100644
--- a/drivers/iio/adc/berlin2-adc.c
+++ b/drivers/iio/adc/berlin2-adc.c
@@ -1,13 +1,10 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Marvell Berlin2 ADC driver
  *
  * Copyright (C) 2015 Marvell Technology Group Ltd.
  *
  * Antoine Tenart <antoine.tenart@free-electrons.com>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
  */
 
 #include <linux/iio/iio.h>
diff --git a/drivers/iio/adc/cc10001_adc.c b/drivers/iio/adc/cc10001_adc.c
index 707d8b24b072..8b72037e04b2 100644
--- a/drivers/iio/adc/cc10001_adc.c
+++ b/drivers/iio/adc/cc10001_adc.c
@@ -1,10 +1,6 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2014-2015 Imagination Technologies Ltd.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
  */
 
 #include <linux/clk.h>
diff --git a/drivers/iio/adc/cpcap-adc.c b/drivers/iio/adc/cpcap-adc.c
index 9ad60421d360..c1bfa4543125 100644
--- a/drivers/iio/adc/cpcap-adc.c
+++ b/drivers/iio/adc/cpcap-adc.c
@@ -1,3 +1,4 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2017 Tony Lindgren <tony@atomide.com>
  *
@@ -5,15 +6,6 @@ 
  * earlier driver found in the Motorola Linux kernel:
  *
  * Copyright (C) 2009-2010 Motorola, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
  */
 
 #include <linux/delay.h>
diff --git a/drivers/iio/adc/da9150-gpadc.c b/drivers/iio/adc/da9150-gpadc.c
index 0a5d9ce79164..620274890645 100644
--- a/drivers/iio/adc/da9150-gpadc.c
+++ b/drivers/iio/adc/da9150-gpadc.c
@@ -1,14 +1,10 @@ 
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * DA9150 GPADC Driver
  *
  * Copyright (c) 2014 Dialog Semiconductor
  *
  * Author: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
- *
- * This program is free software; you can redistribute  it and/or modify it
- * under  the terms of  the GNU General  Public License as published by the
- * Free Software Foundation;  either version 2 of the  License, or (at your
- * option) any later version.
  */
 
 #include <linux/kernel.h>
diff --git a/drivers/iio/adc/dln2-adc.c b/drivers/iio/adc/dln2-adc.c
index c64c6675cae6..03f0f8fc6350 100644
--- a/drivers/iio/adc/dln2-adc.c
+++ b/drivers/iio/adc/dln2-adc.c
@@ -1,11 +1,8 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Driver for the Diolan DLN-2 USB-ADC adapter
  *
  * Copyright (c) 2017 Jack Andersen
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation, version 2.
  */
 
 #include <linux/kernel.h>
diff --git a/drivers/iio/adc/ep93xx_adc.c b/drivers/iio/adc/ep93xx_adc.c
index 5036c392cb20..8f614c84b643 100644
--- a/drivers/iio/adc/ep93xx_adc.c
+++ b/drivers/iio/adc/ep93xx_adc.c
@@ -1,12 +1,9 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Driver for ADC module on the Cirrus Logic EP93xx series of SoCs
  *
  * Copyright (C) 2015 Alexander Sverdlin
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * The driver uses polling to get the conversion status. According to EP93xx
  * datasheets, reading ADCResult register starts the conversion, but user is also
  * responsible for ensuring that delay between adjacent conversion triggers is
diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c
index f10443f92e4c..9f9c186e2135 100644
--- a/drivers/iio/adc/exynos_adc.c
+++ b/drivers/iio/adc/exynos_adc.c
@@ -1,3 +1,4 @@ 
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  exynos_adc.c - Support for ADC in EXYNOS SoCs
  *
@@ -5,16 +6,6 @@ 
  *
  *  Copyright (C) 2013 Naveen Krishna Chatradhi <ch.naveen@samsung.com>
  *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
diff --git a/drivers/iio/adc/fsl-imx25-gcq.c b/drivers/iio/adc/fsl-imx25-gcq.c
index 929c617db364..e03a434b3cd5 100644
--- a/drivers/iio/adc/fsl-imx25-gcq.c
+++ b/drivers/iio/adc/fsl-imx25-gcq.c
@@ -1,10 +1,7 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2014-2015 Pengutronix, Markus Pargmann <mpa@pengutronix.de>
  *
- * This program is free software; you can redistribute it and/or modify it under
- * the terms of the GNU General Public License version 2 as published by the
- * Free Software Foundation.
- *
  * This is the driver for the imx25 GCQ (Generic Conversion Queue)
  * connected to the imx25 ADC.
  */
diff --git a/drivers/iio/adc/hi8435.c b/drivers/iio/adc/hi8435.c
index 6f6c9a348158..0b6bf71af685 100644
--- a/drivers/iio/adc/hi8435.c
+++ b/drivers/iio/adc/hi8435.c
@@ -1,13 +1,9 @@ 
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Holt Integrated Circuits HI-8435 threshold detector driver
  *
  * Copyright (C) 2015 Zodiac Inflight Innovations
  * Copyright (C) 2015 Cogent Embedded, Inc.
- *
- * This program is free software; you can redistribute  it and/or modify it
- * under  the terms of  the GNU General  Public License as published by the
- * Free Software Foundation;  either version 2 of the  License, or (at your
- * option) any later version.
  */
 
 #include <linux/delay.h>
diff --git a/drivers/iio/adc/hx711.c b/drivers/iio/adc/hx711.c
index 36b59d8957fb..894d49843854 100644
--- a/drivers/iio/adc/hx711.c
+++ b/drivers/iio/adc/hx711.c
@@ -1,13 +1,9 @@ 
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * HX711: analog to digital converter for weight sensor module
  *
  * Copyright (c) 2016 Andreas Klinger <ak@it-klinger.de>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
diff --git a/drivers/iio/adc/imx7d_adc.c b/drivers/iio/adc/imx7d_adc.c
index ad6764fb2a23..2f54ea1e4292 100644
--- a/drivers/iio/adc/imx7d_adc.c
+++ b/drivers/iio/adc/imx7d_adc.c
@@ -1,12 +1,8 @@ 
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Freescale i.MX7D ADC driver
  *
  * Copyright (C) 2015 Freescale Semiconductor, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #include <linux/clk.h>
diff --git a/drivers/iio/adc/ina2xx-adc.c b/drivers/iio/adc/ina2xx-adc.c
index bdd7cba6f6b0..9bbcca9df401 100644
--- a/drivers/iio/adc/ina2xx-adc.c
+++ b/drivers/iio/adc/ina2xx-adc.c
@@ -1,20 +1,15 @@ 
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * INA2XX Current and Power Monitors
  *
  * Copyright 2015 Baylibre SAS.
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * Based on linux/drivers/iio/adc/ad7291.c
  * Copyright 2010-2011 Analog Devices Inc.
  *
  * Based on linux/drivers/hwmon/ina2xx.c
  * Copyright 2012 Lothar Felten <l-felten@ti.com>
  *
- * Licensed under the GPL-2 or later.
- *
  * IIO driver for INA219-220-226-230-231
  *
  * Configurable 7-bit I2C slave address from 0x40 to 0x4F
diff --git a/drivers/iio/adc/lp8788_adc.c b/drivers/iio/adc/lp8788_adc.c
index 3bc4df916420..09dd55bff7bc 100644
--- a/drivers/iio/adc/lp8788_adc.c
+++ b/drivers/iio/adc/lp8788_adc.c
@@ -1,13 +1,10 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * TI LP8788 MFD - ADC driver
  *
  * Copyright 2012 Texas Instruments
  *
  * Author: Milo(Woogyom) Kim <milo.kim@ti.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #include <linux/delay.h>
diff --git a/drivers/iio/adc/lpc18xx_adc.c b/drivers/iio/adc/lpc18xx_adc.c
index 041dc4a3f66c..00d39234143d 100644
--- a/drivers/iio/adc/lpc18xx_adc.c
+++ b/drivers/iio/adc/lpc18xx_adc.c
@@ -1,12 +1,9 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * IIO ADC driver for NXP LPC18xx ADC
  *
  * Copyright (C) 2016 Joachim Eastwood <manabian@gmail.com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * UNSUPPORTED hardware features:
  *  - Hardware triggers
  *  - Burst mode
diff --git a/drivers/iio/adc/lpc32xx_adc.c b/drivers/iio/adc/lpc32xx_adc.c
index 20b36690fa4f..e361c1532a75 100644
--- a/drivers/iio/adc/lpc32xx_adc.c
+++ b/drivers/iio/adc/lpc32xx_adc.c
@@ -1,23 +1,10 @@ 
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  lpc32xx_adc.c - Support for ADC in LPC32XX
  *
  *  3-channel, 10-bit ADC
  *
  *  Copyright (C) 2011, 2012 Roland Stigge <stigge@antcom.de>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include <linux/module.h>
diff --git a/drivers/iio/adc/ltc2471.c b/drivers/iio/adc/ltc2471.c
index b88102b751cf..9d5326377676 100644
--- a/drivers/iio/adc/ltc2471.c
+++ b/drivers/iio/adc/ltc2471.c
@@ -1,11 +1,10 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Driver for Linear Technology LTC2471 and LTC2473 voltage monitors
  * The LTC2473 is identical to the 2471, but reports a differential signal.
  *
  * Copyright (C) 2017 Topic Embedded Products
  * Author: Mike Looijmans <mike.looijmans@topic.nl>
- *
- * License: GPLv2
  */
 
 #include <linux/err.h>
diff --git a/drivers/iio/adc/ltc2485.c b/drivers/iio/adc/ltc2485.c
index b24c14037fd4..c0e9a7ba7af4 100644
--- a/drivers/iio/adc/ltc2485.c
+++ b/drivers/iio/adc/ltc2485.c
@@ -1,12 +1,9 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * ltc2485.c - Driver for Linear Technology LTC2485 ADC
  *
  * Copyright (C) 2016 Alison Schofield <amsfield22@gmail.com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * Datasheet: http://cds.linear.com/docs/en/datasheet/2485fd.pdf
  */
 
diff --git a/drivers/iio/adc/ltc2497.c b/drivers/iio/adc/ltc2497.c
index f1f7cdf66fbd..0fe12c0e3b3c 100644
--- a/drivers/iio/adc/ltc2497.c
+++ b/drivers/iio/adc/ltc2497.c
@@ -1,10 +1,9 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * ltc2497.c - Driver for Analog Devices/Linear Technology LTC2497 ADC
  *
  * Copyright (C) 2017 Analog Devices Inc.
  *
- * Licensed under the GPL-2.
- *
  * Datasheet: http://cds.linear.com/docs/en/datasheet/2497fd.pdf
  */
 
diff --git a/drivers/iio/adc/max1027.c b/drivers/iio/adc/max1027.c
index 311c1a89c329..af83207b2804 100644
--- a/drivers/iio/adc/max1027.c
+++ b/drivers/iio/adc/max1027.c
@@ -1,3 +1,4 @@ 
+// SPDX-License-Identifier: GPL-2.0
  /*
   * iio/adc/max1027.c
   * Copyright (C) 2014 Philippe Reynes
@@ -6,10 +7,6 @@ 
   * Copyright 2011 Analog Devices Inc (from AD7923 Driver)
   * Copyright 2012 CS Systemes d'Information
   *
-  * This program is free software; you can redistribute it and/or modify
-  * it under the terms of the GNU General Public License version 2 as
-  * published by the Free Software Foundation.
-  *
   * max1027.c
   *
   * Partial support for max1027 and similar chips.
diff --git a/drivers/iio/adc/max1118.c b/drivers/iio/adc/max1118.c
index 49db9e9ae625..027ee7f6f5d0 100644
--- a/drivers/iio/adc/max1118.c
+++ b/drivers/iio/adc/max1118.c
@@ -1,12 +1,9 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * MAX1117/MAX1118/MAX1119 8-bit, dual-channel ADCs driver
  *
  * Copyright (c) 2017 Akinobu Mita <akinobu.mita@gmail.com>
  *
- * This file is subject to the terms and conditions of version 2 of
- * the GNU General Public License.  See the file COPYING in the main
- * directory of this archive for more details.
- *
  * Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX1117-MAX1119.pdf
  *
  * SPI interface connections
diff --git a/drivers/iio/adc/max1363.c b/drivers/iio/adc/max1363.c
index a8d35aebee80..6d191ffc4c7e 100644
--- a/drivers/iio/adc/max1363.c
+++ b/drivers/iio/adc/max1363.c
@@ -1,3 +1,4 @@ 
+// SPDX-License-Identifier: GPL-2.0
  /*
   * iio/adc/max1363.c
   * Copyright (C) 2008-2010 Jonathan Cameron
@@ -9,10 +10,6 @@ 
   * Copyright (C) 2000 Russell King
   *
   * Driver for max1363 and similar chips.
-  *
-  * This program is free software; you can redistribute it and/or modify
-  * it under the terms of the GNU General Public License version 2 as
-  * published by the Free Software Foundation.
   */
 
 #include <linux/interrupt.h>
diff --git a/drivers/iio/adc/mcp320x.c b/drivers/iio/adc/mcp320x.c
index a04856d8afdb..4b873afe8e5a 100644
--- a/drivers/iio/adc/mcp320x.c
+++ b/drivers/iio/adc/mcp320x.c
@@ -1,3 +1,4 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2013 Oskar Andero <oskar.andero@gmail.com>
  * Copyright (C) 2014 Rose Technology
@@ -34,10 +35,6 @@ 
  * http://ww1.microchip.com/downloads/en/DeviceDoc/21298c.pdf  mcp3204/08
  * http://ww1.microchip.com/downloads/en/DeviceDoc/21700E.pdf  mcp3301
  * http://ww1.microchip.com/downloads/en/DeviceDoc/21950D.pdf  mcp3550/1/3
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #include <linux/err.h>
diff --git a/drivers/iio/adc/mcp3422.c b/drivers/iio/adc/mcp3422.c
index 819f26011500..c8232ba24667 100644
--- a/drivers/iio/adc/mcp3422.c
+++ b/drivers/iio/adc/mcp3422.c
@@ -1,3 +1,4 @@ 
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * mcp3422.c - driver for the Microchip mcp3421/2/3/4/5/6/7/8 chip family
  *
@@ -10,11 +11,6 @@ 
  *
  * This driver exports the value of analog input voltage to sysfs, the
  * voltage unit is nV.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
  */
 
 #include <linux/err.h>
diff --git a/drivers/iio/adc/men_z188_adc.c b/drivers/iio/adc/men_z188_adc.c
index c80261748d8f..0cb809bf1730 100644
--- a/drivers/iio/adc/men_z188_adc.c
+++ b/drivers/iio/adc/men_z188_adc.c
@@ -1,12 +1,9 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * MEN 16z188 Analog to Digial Converter
  *
  * Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de)
  * Author: Johannes Thumshirn <johannes.thumshirn@men.de>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; version 2 of the License.
  */
 
 #include <linux/kernel.h>
diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index 729becb2d3d9..f5299c9bdbde 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -1,12 +1,9 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Amlogic Meson Successive Approximation Register (SAR) A/D Converter
  *
  * Copyright (C) 2017 Martin Blumenstingl <martin.blumenstingl@googlemail.com>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * You should have received a copy of the GNU General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
diff --git a/drivers/iio/adc/mt6577_auxadc.c b/drivers/iio/adc/mt6577_auxadc.c
index 95d76abb64ec..cba0e47c6013 100644
--- a/drivers/iio/adc/mt6577_auxadc.c
+++ b/drivers/iio/adc/mt6577_auxadc.c
@@ -1,15 +1,7 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2016 MediaTek Inc.
  * Author: Zhiyong Tao <zhiyong.tao@mediatek.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include <linux/clk.h>
diff --git a/drivers/iio/adc/mxs-lradc-adc.c b/drivers/iio/adc/mxs-lradc-adc.c
index c627513d9f0f..80983334e5c2 100644
--- a/drivers/iio/adc/mxs-lradc-adc.c
+++ b/drivers/iio/adc/mxs-lradc-adc.c
@@ -1,3 +1,4 @@ 
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Freescale MXS LRADC ADC driver
  *
@@ -7,16 +8,6 @@ 
  * Authors:
  *  Marek Vasut <marex@denx.de>
  *  Ksenija Stanojevic <ksenija.stanojevic@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
  */
 
 #include <linux/completion.h>
diff --git a/drivers/iio/adc/nau7802.c b/drivers/iio/adc/nau7802.c
index 8997e74a8847..4e53a63e5fb9 100644
--- a/drivers/iio/adc/nau7802.c
+++ b/drivers/iio/adc/nau7802.c
@@ -1,9 +1,8 @@ 
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Driver for the Nuvoton NAU7802 ADC
  *
  * Copyright 2013 Free Electrons
- *
- * Licensed under the GPLv2 or later.
  */
 
 #include <linux/delay.h>
diff --git a/drivers/iio/adc/palmas_gpadc.c b/drivers/iio/adc/palmas_gpadc.c
index 69b9affeef1e..45d1bf1253d7 100644
--- a/drivers/iio/adc/palmas_gpadc.c
+++ b/drivers/iio/adc/palmas_gpadc.c
@@ -1,13 +1,10 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * palmas-adc.c -- TI PALMAS GPADC.
  *
  * Copyright (c) 2013, NVIDIA Corporation. All rights reserved.
  *
  * Author: Pradeep Goudagunta <pgoudagunta@nvidia.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation version 2.
  */
 
 #include <linux/module.h>
diff --git a/drivers/iio/adc/qcom-pm8xxx-xoadc.c b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
index c30c002f1fef..648136ed1f85 100644
--- a/drivers/iio/adc/qcom-pm8xxx-xoadc.c
+++ b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
@@ -1,3 +1,4 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Qualcomm PM8xxx PMIC XOADC driver
  *
diff --git a/drivers/iio/adc/qcom-spmi-iadc.c b/drivers/iio/adc/qcom-spmi-iadc.c
index 3f062cd61aba..a8402a47c8e4 100644
--- a/drivers/iio/adc/qcom-spmi-iadc.c
+++ b/drivers/iio/adc/qcom-spmi-iadc.c
@@ -1,14 +1,6 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include <linux/bitops.h>
diff --git a/drivers/iio/adc/qcom-spmi-vadc.c b/drivers/iio/adc/qcom-spmi-vadc.c
index 3680e0d47412..f3e8fdee39d8 100644
--- a/drivers/iio/adc/qcom-spmi-vadc.c
+++ b/drivers/iio/adc/qcom-spmi-vadc.c
@@ -1,14 +1,6 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include <linux/bitops.h>
diff --git a/drivers/iio/adc/rockchip_saradc.c b/drivers/iio/adc/rockchip_saradc.c
index 1f98566d5b3c..234c6df348ce 100644
--- a/drivers/iio/adc/rockchip_saradc.c
+++ b/drivers/iio/adc/rockchip_saradc.c
@@ -1,16 +1,7 @@ 
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Rockchip Successive Approximation Register (SAR) A/D Converter
  * Copyright (C) 2014 ROCKCHIP, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include <linux/module.h>
diff --git a/drivers/iio/adc/spear_adc.c b/drivers/iio/adc/spear_adc.c
index b1da2c46107c..009019a39bba 100644
--- a/drivers/iio/adc/spear_adc.c
+++ b/drivers/iio/adc/spear_adc.c
@@ -1,9 +1,8 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * ST SPEAr ADC driver
  *
  * Copyright 2012 Stefan Roese <sr@denx.de>
- *
- * Licensed under the GPL-2.
  */
 
 #include <linux/module.h>
diff --git a/drivers/iio/adc/stx104.c b/drivers/iio/adc/stx104.c
index 0662ca199eb0..f9d0aaae836f 100644
--- a/drivers/iio/adc/stx104.c
+++ b/drivers/iio/adc/stx104.c
@@ -1,15 +1,7 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * IIO driver for the Apex Embedded Systems STX104
  * Copyright (C) 2016 William Breathitt Gray
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2, as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 #include <linux/bitops.h>
 #include <linux/device.h>
diff --git a/drivers/iio/adc/sun4i-gpadc-iio.c b/drivers/iio/adc/sun4i-gpadc-iio.c
index 04d7147e0110..f13c6248a662 100644
--- a/drivers/iio/adc/sun4i-gpadc-iio.c
+++ b/drivers/iio/adc/sun4i-gpadc-iio.c
@@ -1,11 +1,8 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /* ADC driver for sunxi platforms' (A10, A13 and A31) GPADC
  *
  * Copyright (c) 2016 Quentin Schulz <quentin.schulz@free-electrons.com>
  *
- * This program is free software; you can redistribute it and/or modify it under
- * the terms of the GNU General Public License version 2 as published by the
- * Free Software Foundation.
- *
  * The Allwinner SoCs all have an ADC that can also act as a touchscreen
  * controller and a thermal sensor.
  * The thermal sensor works only when the ADC acts as a touchscreen controller
diff --git a/drivers/iio/adc/ti-adc081c.c b/drivers/iio/adc/ti-adc081c.c
index 405e3779c0c5..92c7584298f6 100644
--- a/drivers/iio/adc/ti-adc081c.c
+++ b/drivers/iio/adc/ti-adc081c.c
@@ -1,13 +1,10 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * TI ADC081C/ADC101C/ADC121C 8/10/12-bit ADC driver
  *
  * Copyright (C) 2012 Avionic Design GmbH
  * Copyright (C) 2016 Intel
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * Datasheets:
  *	http://www.ti.com/lit/ds/symlink/adc081c021.pdf
  *	http://www.ti.com/lit/ds/symlink/adc101c021.pdf
diff --git a/drivers/iio/adc/ti-adc0832.c b/drivers/iio/adc/ti-adc0832.c
index 188dae705bf7..482a00dc9273 100644
--- a/drivers/iio/adc/ti-adc0832.c
+++ b/drivers/iio/adc/ti-adc0832.c
@@ -1,12 +1,9 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * ADC0831/ADC0832/ADC0834/ADC0838 8-bit ADC driver
  *
  * Copyright (c) 2016 Akinobu Mita <akinobu.mita@gmail.com>
  *
- * This file is subject to the terms and conditions of version 2 of
- * the GNU General Public License.  See the file COPYING in the main
- * directory of this archive for more details.
- *
  * Datasheet: http://www.ti.com/lit/ds/symlink/adc0832-n.pdf
  */
 
diff --git a/drivers/iio/adc/ti-adc084s021.c b/drivers/iio/adc/ti-adc084s021.c
index 25504640e126..914d097c8758 100644
--- a/drivers/iio/adc/ti-adc084s021.c
+++ b/drivers/iio/adc/ti-adc084s021.c
@@ -1,13 +1,10 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /**
  * Copyright (C) 2017 Axis Communications AB
  *
  * Driver for Texas Instruments' ADC084S021 ADC chip.
  * Datasheets can be found here:
  * http://www.ti.com/lit/ds/symlink/adc084s021.pdf
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #include <linux/err.h>
diff --git a/drivers/iio/adc/ti-adc108s102.c b/drivers/iio/adc/ti-adc108s102.c
index 841203edaac5..a1c16199e7cc 100644
--- a/drivers/iio/adc/ti-adc108s102.c
+++ b/drivers/iio/adc/ti-adc108s102.c
@@ -1,18 +1,10 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * TI ADC108S102 SPI ADC driver
  *
  * Copyright (c) 2013-2015 Intel Corporation.
  * Copyright (c) 2017 Siemens AG
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
  * This IIO device driver is designed to work with the following
  * analog to digital converters from Texas Instruments:
  *  ADC108S102
diff --git a/drivers/iio/adc/ti-adc12138.c b/drivers/iio/adc/ti-adc12138.c
index 703d68ae96b7..9445b79ad7b8 100644
--- a/drivers/iio/adc/ti-adc12138.c
+++ b/drivers/iio/adc/ti-adc12138.c
@@ -1,12 +1,9 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * ADC12130/ADC12132/ADC12138 12-bit plus sign ADC driver
  *
  * Copyright (c) 2016 Akinobu Mita <akinobu.mita@gmail.com>
  *
- * This file is subject to the terms and conditions of version 2 of
- * the GNU General Public License.  See the file COPYING in the main
- * directory of this archive for more details.
- *
  * Datasheet: http://www.ti.com/lit/ds/symlink/adc12138.pdf
  */
 
diff --git a/drivers/iio/adc/ti-ads1015.c b/drivers/iio/adc/ti-ads1015.c
index 6a114dcb4a3a..cddb41a3919c 100644
--- a/drivers/iio/adc/ti-ads1015.c
+++ b/drivers/iio/adc/ti-ads1015.c
@@ -1,12 +1,9 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * ADS1015 - Texas Instruments Analog-to-Digital Converter
  *
  * Copyright (c) 2016, Intel Corporation.
  *
- * This file is subject to the terms and conditions of version 2 of
- * the GNU General Public License.  See the file COPYING in the main
- * directory of this archive for more details.
- *
  * IIO driver for ADS1015 ADC 7-bit I2C slave address:
  *	* 0x48 - ADDR connected to Ground
  *	* 0x49 - ADDR connected to Vdd
diff --git a/drivers/iio/adc/ti-ads8688.c b/drivers/iio/adc/ti-ads8688.c
index 184d686ebd99..83d99a79f79e 100644
--- a/drivers/iio/adc/ti-ads8688.c
+++ b/drivers/iio/adc/ti-ads8688.c
@@ -1,9 +1,6 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2015 Prevas A/S
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #include <linux/device.h>
diff --git a/drivers/iio/adc/ti-tlc4541.c b/drivers/iio/adc/ti-tlc4541.c
index 2290024c89fc..945d547302c6 100644
--- a/drivers/iio/adc/ti-tlc4541.c
+++ b/drivers/iio/adc/ti-tlc4541.c
@@ -1,3 +1,4 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * TI tlc4541 ADC Driver
  *
@@ -7,10 +8,6 @@ 
  * http://www.ti.com/lit/gpn/tlc3541
  * http://www.ti.com/lit/gpn/tlc4541
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  * The tlc4541 requires 24 clock cycles to start a transfer.
  * Conversion then takes 2.94us to complete before data is ready
  * Data is returned MSB first.
diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index cafb1dcadc48..aac5a1959b78 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -1,16 +1,8 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * TI ADC MFD driver
  *
  * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation version 2.
- *
- * This program is distributed "as is" WITHOUT ANY WARRANTY of any
- * kind, whether express or implied; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include <linux/kernel.h>
diff --git a/drivers/iio/adc/twl4030-madc.c b/drivers/iio/adc/twl4030-madc.c
index 8c019bb6625f..d3ea08f8d33d 100644
--- a/drivers/iio/adc/twl4030-madc.c
+++ b/drivers/iio/adc/twl4030-madc.c
@@ -1,3 +1,4 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  *
  * TWL4030 MADC module driver-This driver monitors the real time
@@ -12,21 +13,6 @@ 
  * Mikko Ylinen <mikko.k.ylinen@nokia.com>
  *
  * Amit Kucheria <amit.kucheria@canonical.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
  */
 
 #include <linux/device.h>
diff --git a/drivers/iio/adc/twl6030-gpadc.c b/drivers/iio/adc/twl6030-gpadc.c
index e470510e76ea..201027839c1e 100644
--- a/drivers/iio/adc/twl6030-gpadc.c
+++ b/drivers/iio/adc/twl6030-gpadc.c
@@ -1,3 +1,4 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * TWL6030 GPADC module driver
  *
@@ -12,21 +13,6 @@ 
  * Based on twl4030-madc.c
  * Copyright (C) 2008 Nokia Corporation
  * Mikko Ylinen <mikko.k.ylinen@nokia.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
  */
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
diff --git a/drivers/iio/adc/vf610_adc.c b/drivers/iio/adc/vf610_adc.c
index bbcb7a4d7edf..a9d13b8b9a68 100644
--- a/drivers/iio/adc/vf610_adc.c
+++ b/drivers/iio/adc/vf610_adc.c
@@ -1,21 +1,8 @@ 
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Freescale Vybrid vf610 ADC driver
  *
  * Copyright 2013 Freescale Semiconductor, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include <linux/module.h>
diff --git a/drivers/iio/adc/viperboard_adc.c b/drivers/iio/adc/viperboard_adc.c
index 53eb5a4136fe..5b64a5ea488f 100644
--- a/drivers/iio/adc/viperboard_adc.c
+++ b/drivers/iio/adc/viperboard_adc.c
@@ -1,15 +1,10 @@ 
+// SPDX-License-Identifier: GPL-2.0+
 /*
  *  Nano River Technologies viperboard IIO ADC driver
  *
  *  (C) 2012 by Lemonage GmbH
  *  Author: Lars Poeschel <poeschel@lemonage.de>
  *  All rights reserved.
- *
- *  This program is free software; you can redistribute  it and/or modify it
- *  under  the terms of  the GNU General  Public License as published by the
- *  Free Software Foundation;  either version 2 of the	License, or (at your
- *  option) any later version.
- *
  */
 
 #include <linux/kernel.h>
diff --git a/drivers/iio/adc/xilinx-xadc-core.c b/drivers/iio/adc/xilinx-xadc-core.c
index 3f6be5ac049a..b7b5adf6c9fc 100644
--- a/drivers/iio/adc/xilinx-xadc-core.c
+++ b/drivers/iio/adc/xilinx-xadc-core.c
@@ -1,11 +1,10 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Xilinx XADC driver
  *
  * Copyright 2013-2014 Analog Devices Inc.
  *  Author: Lars-Peter Clauen <lars@metafoo.de>
  *
- * Licensed under the GPL-2.
- *
  * Documentation for the parts can be found at:
  *  - XADC hardmacro: Xilinx UG480
  *  - ZYNQ XADC interface: Xilinx UG585
diff --git a/drivers/iio/adc/xilinx-xadc-events.c b/drivers/iio/adc/xilinx-xadc-events.c
index dc0670308253..0c81ad4f0a05 100644
--- a/drivers/iio/adc/xilinx-xadc-events.c
+++ b/drivers/iio/adc/xilinx-xadc-events.c
@@ -1,10 +1,9 @@ 
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Xilinx XADC driver
  *
  * Copyright 2013 Analog Devices Inc.
  *  Author: Lars-Peter Clauen <lars@metafoo.de>
- *
- * Licensed under the GPL-2.
  */
 
 #include <linux/iio/events.h>
diff --git a/drivers/iio/adc/xilinx-xadc.h b/drivers/iio/adc/xilinx-xadc.h
index 8c0009585c16..5b9042e7441d 100644
--- a/drivers/iio/adc/xilinx-xadc.h
+++ b/drivers/iio/adc/xilinx-xadc.h
@@ -1,10 +1,9 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Xilinx XADC driver
  *
  * Copyright 2013 Analog Devices Inc.
  *  Author: Lars-Peter Clauen <lars@metafoo.de>
- *
- * Licensed under the GPL-2.
  */
 
 #ifndef __IIO_XILINX_XADC__