From patchwork Thu Feb 14 14:00:20 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 1042198 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-gpio-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=bgdev.pl Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=bgdev-pl.20150623.gappssmtp.com header.i=@bgdev-pl.20150623.gappssmtp.com header.b="jGaJAppS"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 440dNT6hTWz9sNJ for ; Fri, 15 Feb 2019 01:01:29 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2439045AbfBNOBS (ORCPT ); Thu, 14 Feb 2019 09:01:18 -0500 Received: from mail-wm1-f66.google.com ([209.85.128.66]:54563 "EHLO mail-wm1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2439034AbfBNOAv (ORCPT ); Thu, 14 Feb 2019 09:00:51 -0500 Received: by mail-wm1-f66.google.com with SMTP id a62so6404436wmh.4 for ; Thu, 14 Feb 2019 06:00:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=krSRy2BR7/lBUSfBkF8HPbKkzTxQSpgqYzJEmOcZcLg=; b=jGaJAppSAfmV30f11LAUykwUZWH3HRLVPLrHL+dO1gAZAIISQsGcbGZoSj5lO5pFi8 oAmlyrjyJa3LiA7g/k26uBMJXNDtsBfv02hh4NI0XdfqWNh7KleLUFmcHwsOk9Ix+vu6 8t4+k4BzpS6zSaWkIyQWSNNvLRhz7rVUHO0F/r3yN4i4i/FMLghSzCzzSOFyXA2eUdHM 148Ikrg1XquU+QorKL610sunAsT42Uru/DcERqf4Y+UKA4J0EGXARTHOUlTjC13zIMrP 9ga0Vtj40whJFEKtuJm2DQoU9VdfTLJ2RamYljins7MectBf93naS2EUhvDe5Js12NWm 1Qtg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=krSRy2BR7/lBUSfBkF8HPbKkzTxQSpgqYzJEmOcZcLg=; b=oWYKKaFMQTFGvEXPfZv+aWSZ3kqKqCzqsCukwnzuJXEBtbKm6GdxP7ORFSP5+WwXzD j+SEDb/pX6KE7XHbcfQd9jxJ+oWeNBZMVpQ15wRx++cvgmgOBtoXazBmOcoChRu9kieF 0vFmhwulIh80nSqOGQcl4+4GG43O00A3WBxXBO6csZYhWH+jLjM62d8QVTXQPIvsM75/ vajuSTx9/je/2VtviGhMlCoKYsaGz7PzRHiJvcCIYe2TBLUSvP3NByu4eNiuncVup2q1 KUQhgINWOwuPB9aZXpQlhzg/+3Z4XCcgFG0lq8d3vwIJ+2nVEY3/SNEqM+FUury86cZg gtkw== X-Gm-Message-State: AHQUAuZh4K39tCRrRG9ynuXmne6PVxpbMHXc9IZs5Oh5iLUUSqKmR3Ui T9cLoen9szyt6IF5esmmdXPsMg== X-Google-Smtp-Source: AHgI3IbdoTpL/rbHTrUppJwpa4FQm23pVfYXOEhbVhoJV1gGW8YYekvxbug2aEaclnfIh6SE5RdwnA== X-Received: by 2002:a1c:2d42:: with SMTP id t63mr2991082wmt.9.1550152849554; Thu, 14 Feb 2019 06:00:49 -0800 (PST) Received: from debian-brgl.home ([2a01:cb1d:af:5b00:6d6c:8493:1ab5:dad7]) by smtp.gmail.com with ESMTPSA id h142sm3395677wme.33.2019.02.14.06.00.48 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 14 Feb 2019 06:00:48 -0800 (PST) From: Bartosz Golaszewski To: Rob Herring , Mark Rutland , Linus Walleij , Dmitry Torokhov , Jacek Anaszewski , Pavel Machek , Lee Jones , Sebastian Reichel , Liam Girdwood , Greg Kroah-Hartman Cc: linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-input@vger.kernel.org, linux-leds@vger.kernel.org, linux-pm@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH v6 09/11] leds: max77650: add LEDs support Date: Thu, 14 Feb 2019 15:00:20 +0100 Message-Id: <20190214140022.19201-10-brgl@bgdev.pl> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190214140022.19201-1-brgl@bgdev.pl> References: <20190214140022.19201-1-brgl@bgdev.pl> MIME-Version: 1.0 Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org From: Bartosz Golaszewski This adds basic support for LEDs for the max77650 PMIC. The device has three current sinks for driving LEDs. Signed-off-by: Bartosz Golaszewski Acked-by: Jacek Anaszewski --- drivers/leds/Kconfig | 6 ++ drivers/leds/Makefile | 1 + drivers/leds/leds-max77650.c | 147 +++++++++++++++++++++++++++++++++++ 3 files changed, 154 insertions(+) create mode 100644 drivers/leds/leds-max77650.c diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index a72f97fca57b..d8c70cc6a714 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -608,6 +608,12 @@ config LEDS_TLC591XX This option enables support for Texas Instruments TLC59108 and TLC59116 LED controllers. +config LEDS_MAX77650 + tristate "LED support for Maxim MAX77650 PMIC" + depends on LEDS_CLASS && MFD_MAX77650 + help + LEDs driver for MAX77650 family of PMICs from Maxim Integrated. + config LEDS_MAX77693 tristate "LED support for MAX77693 Flash" depends on LEDS_CLASS_FLASH diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 4c1b0054f379..f48b2404dbb7 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -61,6 +61,7 @@ obj-$(CONFIG_LEDS_MC13783) += leds-mc13783.o obj-$(CONFIG_LEDS_NS2) += leds-ns2.o obj-$(CONFIG_LEDS_NETXBIG) += leds-netxbig.o obj-$(CONFIG_LEDS_ASIC3) += leds-asic3.o +obj-$(CONFIG_LEDS_MAX77650) += leds-max77650.o obj-$(CONFIG_LEDS_MAX77693) += leds-max77693.o obj-$(CONFIG_LEDS_MAX8997) += leds-max8997.o obj-$(CONFIG_LEDS_LM355x) += leds-lm355x.o diff --git a/drivers/leds/leds-max77650.c b/drivers/leds/leds-max77650.c new file mode 100644 index 000000000000..6b74ce9cac12 --- /dev/null +++ b/drivers/leds/leds-max77650.c @@ -0,0 +1,147 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Copyright (C) 2018 BayLibre SAS +// Author: Bartosz Golaszewski +// +// LED driver for MAXIM 77650/77651 charger/power-supply. + +#include +#include +#include +#include +#include +#include + +#define MAX77650_LED_NUM_LEDS 3 + +#define MAX77650_LED_A_BASE 0x40 +#define MAX77650_LED_B_BASE 0x43 + +#define MAX77650_LED_BR_MASK GENMASK(4, 0) +#define MAX77650_LED_EN_MASK GENMASK(7, 6) + +#define MAX77650_LED_MAX_BRIGHTNESS MAX77650_LED_BR_MASK + +/* Enable EN_LED_MSTR. */ +#define MAX77650_LED_TOP_DEFAULT BIT(0) + +#define MAX77650_LED_ENABLE GENMASK(7, 6) +#define MAX77650_LED_DISABLE 0x00 + +#define MAX77650_LED_A_DEFAULT MAX77650_LED_DISABLE +/* 100% on duty */ +#define MAX77650_LED_B_DEFAULT GENMASK(3, 0) + +struct max77650_led { + struct led_classdev cdev; + struct regmap *map; + unsigned int regA; + unsigned int regB; +}; + +static struct max77650_led *max77650_to_led(struct led_classdev *cdev) +{ + return container_of(cdev, struct max77650_led, cdev); +} + +static int max77650_led_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct max77650_led *led = max77650_to_led(cdev); + int val, mask; + + mask = MAX77650_LED_BR_MASK | MAX77650_LED_EN_MASK; + + if (brightness == LED_OFF) + val = MAX77650_LED_DISABLE; + else + val = MAX77650_LED_ENABLE | brightness; + + return regmap_update_bits(led->map, led->regA, mask, val); +} + +static int max77650_led_probe(struct platform_device *pdev) +{ + struct device_node *of_node, *child; + struct max77650_led *leds, *led; + struct device *parent; + struct device *dev; + struct regmap *map; + const char *label; + int rv, num_leds; + u32 reg; + + dev = &pdev->dev; + parent = dev->parent; + of_node = dev->of_node; + + if (!of_node) + return -ENODEV; + + leds = devm_kcalloc(dev, sizeof(*leds), + MAX77650_LED_NUM_LEDS, GFP_KERNEL); + if (!leds) + return -ENOMEM; + + map = dev_get_regmap(dev->parent, NULL); + if (!map) + return -ENODEV; + + num_leds = of_get_child_count(of_node); + if (!num_leds || num_leds > MAX77650_LED_NUM_LEDS) + return -ENODEV; + + for_each_child_of_node(of_node, child) { + rv = of_property_read_u32(child, "reg", ®); + if (rv || reg >= MAX77650_LED_NUM_LEDS) + return -EINVAL; + + led = &leds[reg]; + led->map = map; + led->regA = MAX77650_LED_A_BASE + reg; + led->regB = MAX77650_LED_B_BASE + reg; + led->cdev.brightness_set_blocking = max77650_led_brightness_set; + led->cdev.max_brightness = MAX77650_LED_MAX_BRIGHTNESS; + + label = of_get_property(child, "label", NULL); + if (!label) { + led->cdev.name = "max77650::"; + } else { + led->cdev.name = devm_kasprintf(dev, GFP_KERNEL, + "max77650:%s", label); + if (!led->cdev.name) + return -ENOMEM; + } + + of_property_read_string(child, "linux,default-trigger", + &led->cdev.default_trigger); + + rv = devm_of_led_classdev_register(dev, child, &led->cdev); + if (rv) + return rv; + + rv = regmap_write(map, led->regA, MAX77650_LED_A_DEFAULT); + if (rv) + return rv; + + rv = regmap_write(map, led->regB, MAX77650_LED_B_DEFAULT); + if (rv) + return rv; + } + + return regmap_write(map, + MAX77650_REG_CNFG_LED_TOP, + MAX77650_LED_TOP_DEFAULT); +} + +static struct platform_driver max77650_led_driver = { + .driver = { + .name = "max77650-led", + }, + .probe = max77650_led_probe, +}; +module_platform_driver(max77650_led_driver); + +MODULE_DESCRIPTION("MAXIM 77650/77651 LED driver"); +MODULE_AUTHOR("Bartosz Golaszewski "); +MODULE_LICENSE("GPL v2");