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[v4,01/18] mfd: add new driver for Sharp LoCoMo

Message ID 1432554113-26280-2-git-send-email-dbaryshkov@gmail.com
State New
Headers show

Commit Message

Dmitry Eremin-Solenikov May 25, 2015, 11:41 a.m. UTC
LoCoMo is a GA used on Sharp Zaurus SL-5x00. Current driver does has
several design issues (special bus instead of platform bus, doesn't use
mfd-core, etc).

Implement 'core' parts of locomo support as an mfd driver.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
---
 drivers/mfd/Kconfig        |  10 ++
 drivers/mfd/Makefile       |   1 +
 drivers/mfd/locomo.c       | 336 +++++++++++++++++++++++++++++++++++++++++++++
 include/linux/mfd/locomo.h | 169 +++++++++++++++++++++++
 4 files changed, 516 insertions(+)
 create mode 100644 drivers/mfd/locomo.c
 create mode 100644 include/linux/mfd/locomo.h

Comments

Lee Jones May 27, 2015, 10:27 a.m. UTC | #1
On Mon, 25 May 2015, Dmitry Eremin-Solenikov wrote:

> LoCoMo is a GA used on Sharp Zaurus SL-5x00. Current driver does has
> several design issues (special bus instead of platform bus, doesn't use
> mfd-core, etc).
> 
> Implement 'core' parts of locomo support as an mfd driver.
> 
> Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
> ---

These things are much easier to re-review if you keep a change-log
here.

>  drivers/mfd/Kconfig        |  10 ++
>  drivers/mfd/Makefile       |   1 +
>  drivers/mfd/locomo.c       | 336 +++++++++++++++++++++++++++++++++++++++++++++
>  include/linux/mfd/locomo.h | 169 +++++++++++++++++++++++
>  4 files changed, 516 insertions(+)
>  create mode 100644 drivers/mfd/locomo.c
>  create mode 100644 include/linux/mfd/locomo.h

Looks good now though:
  Acked-by: Lee Jones <lee.jones@linaro.org>

How do you plan for this to be merged?

> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index d5ad04d..8c33940 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -1430,6 +1430,16 @@ config MFD_STW481X
>  	  in various ST Microelectronics and ST-Ericsson embedded
>  	  Nomadik series.
>  
> +config MFD_LOCOMO
> +	bool "Sharp LoCoMo support"
> +	depends on ARM
> +	select MFD_CORE
> +	select IRQ_DOMAIN
> +	select REGMAP_MMIO
> +	help
> +	  Support for Sharp LoCoMo Grid Array found in Sharp SL-5x00
> +          PDA family.
> +
>  menu "Multimedia Capabilities Port drivers"
>  	depends on ARCH_SA1100
>  
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 0e5cfeb..6c23b73 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -181,6 +181,7 @@ obj-$(CONFIG_MFD_HI6421_PMIC)	+= hi6421-pmic-core.o
>  obj-$(CONFIG_MFD_DLN2)		+= dln2.o
>  obj-$(CONFIG_MFD_RT5033)	+= rt5033.o
>  obj-$(CONFIG_MFD_SKY81452)	+= sky81452.o
> +obj-$(CONFIG_MFD_LOCOMO)	+= locomo.o
>  
>  intel-soc-pmic-objs		:= intel_soc_pmic_core.o intel_soc_pmic_crc.o
>  obj-$(CONFIG_INTEL_SOC_PMIC)	+= intel-soc-pmic.o
> diff --git a/drivers/mfd/locomo.c b/drivers/mfd/locomo.c
> new file mode 100644
> index 0000000..4682893
> --- /dev/null
> +++ b/drivers/mfd/locomo.c
> @@ -0,0 +1,336 @@
> +/*
> + * Sharp LoCoMo support
> + *
> + * (C) Copyright 2015 Dmitry Eremin-Solenikov
> + *
> + * Based on old driver at arch/arm/common/locomo.c
> + *
> + * (C) Copyright 2004 John Lenz
> + *
> + * 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 file contains all generic LoCoMo support.
> + *
> + * All initialization functions provided here are intended to be called
> + * from machine specific code with proper arguments when required.
> + */
> +
> +#include <linux/delay.h>
> +#include <linux/gpio.h>
> +#include <linux/io.h>
> +#include <linux/irq.h>
> +#include <linux/irqdomain.h>
> +#include <linux/kernel.h>
> +#include <linux/mfd/core.h>
> +#include <linux/mfd/locomo.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/regmap.h>
> +#include <linux/slab.h>
> +
> +/* LoCoMo Interrupts */
> +#define IRQ_LOCOMO_KEY		0
> +#define IRQ_LOCOMO_GPIO		1
> +#define IRQ_LOCOMO_LT		2
> +#define IRQ_LOCOMO_SPI		3
> +
> +#define LOCOMO_NR_IRQS		4
> +
> +/* The following is the overall data for the locomo chip */
> +struct locomo {
> +	struct device *dev;
> +	unsigned int irq;
> +	spinlock_t lock;
> +	struct irq_domain *domain;
> +	struct regmap *regmap;
> +};
> +
> +static struct resource locomo_kbd_resources[] = {
> +	DEFINE_RES_IRQ(IRQ_LOCOMO_KEY),
> +};
> +
> +static struct resource locomo_gpio_resources[] = {
> +	DEFINE_RES_IRQ(IRQ_LOCOMO_GPIO),
> +};
> +
> +/* Filled in locomo_probe() function, will be kmemduped by platform core */
> +static struct locomo_gpio_platform_data locomo_gpio_pdata;
> +
> +static struct resource locomo_lt_resources[] = {
> +	DEFINE_RES_IRQ(IRQ_LOCOMO_LT),
> +};
> +
> +static struct resource locomo_spi_resources[] = {
> +	DEFINE_RES_IRQ(IRQ_LOCOMO_SPI),
> +};
> +
> +/* Filled in locomo_probe() function, will be kmemduped by platform core */
> +static struct locomo_lcd_platform_data locomo_lcd_pdata;
> +
> +static struct mfd_cell locomo_cells[] = {
> +	{
> +		.name = "locomo-kbd",
> +		.resources = locomo_kbd_resources,
> +		.num_resources = ARRAY_SIZE(locomo_kbd_resources),
> +	},
> +	{
> +		.name = "locomo-gpio",
> +		.resources = locomo_gpio_resources,
> +		.num_resources = ARRAY_SIZE(locomo_gpio_resources),
> +		.platform_data = &locomo_gpio_pdata,
> +		.pdata_size = sizeof(locomo_gpio_pdata),
> +	},
> +	{
> +		.name = "locomo-lt", /* Long time timer */
> +		.resources = locomo_lt_resources,
> +		.num_resources = ARRAY_SIZE(locomo_lt_resources),
> +	},
> +	{
> +		.name = "locomo-spi",
> +		.resources = locomo_spi_resources,
> +		.num_resources = ARRAY_SIZE(locomo_spi_resources),
> +	},
> +	{
> +		.name = "locomo-lcd",
> +		.platform_data = &locomo_lcd_pdata,
> +		.pdata_size = sizeof(locomo_lcd_pdata),
> +	},
> +	{ .name = "locomo-led", },
> +	{ .name = "locomo-backlight", },
> +	{ .name = "locomo-i2c", },
> +};
> +
> +/*
> + * IRQ support
> + */
> +static void locomo_handler(unsigned int irq, struct irq_desc *desc)
> +{
> +	struct locomo *ldev = irq_get_handler_data(irq);
> +	struct irq_chip *irqchip = irq_desc_get_chip(desc);
> +	unsigned int req;
> +
> +	chained_irq_enter(irqchip, desc);
> +
> +	/* Check why this interrupt was generated */
> +	while (1) {
> +		regmap_read(ldev->regmap, LOCOMO_ICR, &req);
> +		req >>= LOCOMO_ICR_STATUS_SHIFT;
> +
> +		if (!req)
> +			break;
> +
> +		irq = ffs(req) - 1;
> +		generic_handle_irq(irq_find_mapping(ldev->domain, irq));
> +	}
> +
> +	chained_irq_exit(irqchip, desc);
> +}
> +
> +static void locomo_mask_irq(struct irq_data *d)
> +{
> +	struct locomo *ldev = irq_data_get_irq_chip_data(d);
> +	unsigned int mask = BIT(d->hwirq + LOCOMO_ICR_MASK_SHIFT);
> +
> +	regmap_update_bits(ldev->regmap, LOCOMO_ICR, mask, 0);
> +}
> +
> +static void locomo_unmask_irq(struct irq_data *d)
> +{
> +	struct locomo *ldev = irq_data_get_irq_chip_data(d);
> +	unsigned int mask = BIT(d->hwirq + LOCOMO_ICR_MASK_SHIFT);
> +
> +	regmap_update_bits(ldev->regmap, LOCOMO_ICR, mask, mask);
> +}
> +
> +static struct irq_chip locomo_chip = {
> +	.name		= "locomo",
> +	.irq_mask	= locomo_mask_irq,
> +	.irq_unmask	= locomo_unmask_irq,
> +};
> +
> +static int locomo_irq_map(struct irq_domain *d, unsigned int virq,
> +				irq_hw_number_t hwirq)
> +{
> +	struct locomo *locomo = d->host_data;
> +
> +	irq_set_chip_data(virq, locomo);
> +	irq_set_chip_and_handler(virq, &locomo_chip, handle_level_irq);
> +	set_irq_flags(virq, IRQF_VALID);
> +
> +	return 0;
> +}
> +
> +static void locomo_irq_unmap(struct irq_domain *d, unsigned int virq)
> +{
> +	set_irq_flags(virq, 0);
> +	irq_set_chip_and_handler(virq, NULL, NULL);
> +	irq_set_chip_data(virq, NULL);
> +}
> +
> +static struct irq_domain_ops locomo_irq_ops = {
> +	.map    = locomo_irq_map,
> +	.unmap  = locomo_irq_unmap,
> +	.xlate  = irq_domain_xlate_onecell,
> +};
> +
> +static int locomo_setup_irq(struct locomo *ldev)
> +{
> +	ldev->domain = irq_domain_add_simple(NULL, LOCOMO_NR_IRQS, 0,
> +					     &locomo_irq_ops, ldev);
> +	if (!ldev->domain)
> +		return -ENOMEM;
> +
> +	/*
> +	 * Install handler for IRQ_LOCOMO_HW.
> +	 */
> +	irq_set_irq_type(ldev->irq, IRQ_TYPE_EDGE_FALLING);
> +	irq_set_handler_data(ldev->irq, ldev);
> +	irq_set_chained_handler(ldev->irq, locomo_handler);
> +
> +	return 0;
> +}
> +
> +#ifdef CONFIG_PM_SLEEP
> +static int locomo_suspend(struct device *dev)
> +{
> +	struct locomo *ldev = dev_get_drvdata(dev);
> +
> +	/* Audio */
> +	regmap_write(ldev->regmap, LOCOMO_PAIF, 0x00);
> +
> +	/*
> +	 * Original code disabled the clock depending on leds settings
> +	 * However we disable leds before suspend, thus it's safe
> +	 * to just assume this setting.
> +	 */
> +	/* CLK32 off */
> +	regmap_write(ldev->regmap, LOCOMO_C32K, 0x00);
> +
> +	/* 22MHz/24MHz clock off */
> +	regmap_write(ldev->regmap, LOCOMO_ACC, 0x00);
> +
> +	return 0;
> +}
> +
> +static int locomo_resume(struct device *dev)
> +{
> +	struct locomo *ldev = dev_get_drvdata(dev);
> +
> +	regmap_write(ldev->regmap, LOCOMO_C32K, 0x00);
> +
> +	return 0;
> +}
> +#endif
> +
> +static SIMPLE_DEV_PM_OPS(locomo_pm, locomo_suspend, locomo_resume);
> +
> +static const struct regmap_config locomo_regmap_config = {
> +	.name = "LoCoMo",
> +	.reg_bits = 8,
> +	.reg_stride = 4,
> +	.val_bits = 16,
> +	.cache_type = REGCACHE_NONE,
> +	.max_register = 0xec,
> +};
> +
> +static int locomo_probe(struct platform_device *pdev)
> +{
> +	struct locomo_platform_data *pdata = dev_get_platdata(&pdev->dev);
> +	struct resource *res;
> +	void __iomem *base;
> +	struct locomo *ldev;
> +	unsigned int rev;
> +	int ret;
> +
> +	ldev = devm_kzalloc(&pdev->dev, sizeof(*ldev), GFP_KERNEL);
> +	if (!ldev)
> +		return -ENOMEM;
> +
> +	spin_lock_init(&ldev->lock);
> +	ldev->dev = &pdev->dev;
> +
> +	ldev->irq = platform_get_irq(pdev, 0);
> +	if (ldev->irq < 0)
> +		return ldev->irq;
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	base = devm_ioremap_resource(&pdev->dev, res);
> +	if (IS_ERR(base))
> +		return PTR_ERR(base);
> +
> +	ldev->regmap = devm_regmap_init_mmio(&pdev->dev, base,
> +					      &locomo_regmap_config);
> +	if (IS_ERR(ldev->regmap))
> +		return PTR_ERR(ldev->regmap);
> +
> +	if (pdata) {
> +		locomo_gpio_pdata.gpio_base = pdata->gpio_base;
> +		locomo_lcd_pdata.comadj = pdata->comadj;
> +	} else {
> +		locomo_gpio_pdata.gpio_base = -1;
> +		locomo_lcd_pdata.comadj = 128;
> +	}
> +
> +	platform_set_drvdata(pdev, ldev);
> +
> +	regmap_read(ldev->regmap, LOCOMO_VER, &rev);
> +	dev_info(&pdev->dev, "LoCoMo Chip: %04x\n", rev);
> +
> +	/* Clear IRQ status and mask */
> +	regmap_write(ldev->regmap, LOCOMO_ICR, 0);
> +
> +	/* Longtime timer */
> +	regmap_write(ldev->regmap, LOCOMO_LTINT, 0);
> +
> +	ret = locomo_setup_irq(ldev);
> +	if (ret)
> +		return ret;
> +
> +	ret = mfd_add_devices(&pdev->dev, pdev->id,
> +			locomo_cells, ARRAY_SIZE(locomo_cells),
> +			res, -1, ldev->domain);
> +	if (ret)
> +		goto err;
> +
> +	return 0;
> +
> +err:
> +	irq_set_chained_handler(ldev->irq, NULL);
> +	irq_set_handler_data(ldev->irq, NULL);
> +
> +	irq_domain_remove(ldev->domain);
> +
> +	return ret;
> +}
> +
> +static int locomo_remove(struct platform_device *dev)
> +{
> +	struct locomo *ldev = platform_get_drvdata(dev);
> +
> +	mfd_remove_devices(&dev->dev);
> +
> +	irq_set_chained_handler(ldev->irq, NULL);
> +	irq_set_handler_data(ldev->irq, NULL);
> +
> +	irq_domain_remove(ldev->domain);
> +
> +	return 0;
> +}
> +
> +static struct platform_driver locomo_device_driver = {
> +	.probe	= locomo_probe,
> +	.remove	= locomo_remove,
> +	.driver	= {
> +		.name	= "locomo",
> +		.pm	= &locomo_pm,
> +	},
> +};
> +
> +module_platform_driver(locomo_device_driver);
> +
> +MODULE_DESCRIPTION("Sharp LoCoMo core driver");
> +MODULE_LICENSE("GPL v2");
> +MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
> +MODULE_ALIAS("platform:locomo");
> diff --git a/include/linux/mfd/locomo.h b/include/linux/mfd/locomo.h
> new file mode 100644
> index 0000000..999e3de
> --- /dev/null
> +++ b/include/linux/mfd/locomo.h
> @@ -0,0 +1,169 @@
> +/*
> + * This file contains the definitions for the LoCoMo G/A Chip
> + *
> + * (C) Copyright 2015 Dmitry Eremin-Solenikov
> + * (C) Copyright 2004 John Lenz
> + *
> + * May be copied or modified under the terms of the GNU General Public
> + * License.  See linux/COPYING for more information.
> + *
> + * Based on sa1111.h
> + */
> +
> +#ifndef _ASM_ARCH_LOCOMO
> +#define _ASM_ARCH_LOCOMO
> +
> +/* LOCOMO chip version */
> +#define LOCOMO_VER	0x00
> +
> +/* Pin status */
> +#define LOCOMO_ST	0x04
> +
> +/* Pin status */
> +#define LOCOMO_C32K	0x08
> +
> +/* Interrupt controller */
> +#define LOCOMO_ICR	0x0c
> +#define LOCOMO_ICR_MASK_SHIFT	4
> +#define LOCOMO_ICR_STATUS_SHIFT	8
> +
> +/* Touch panel controller */
> +#define LOCOMO_ASD	0x20		/* AD start delay */
> +#define LOCOMO_HSD	0x28		/* HSYS delay */
> +#define LOCOMO_HSC	0x2c		/* HSYS period */
> +#define LOCOMO_TADC	0x30		/* tablet ADC clock */
> +
> +/* Backlight controller: TFT signal */
> +#define LOCOMO_TC	0x38		/* TFT control signal */
> +#define LOCOMO_CPSD	0x3c		/* CPS delay */
> +
> +/* Keyboard controller */
> +#define LOCOMO_KIB	0x40	/* KIB level */
> +#define LOCOMO_KSC	0x44	/* KSTRB control */
> +#define LOCOMO_KCMD	0x48	/* KSTRB command */
> +#define LOCOMO_KIC	0x4c	/* Key interrupt */
> +
> +/* Audio clock */
> +#define LOCOMO_ACC	0x54	/* Audio clock */
> +#define LOCOMO_ACC_XON		0x80
> +#define LOCOMO_ACC_XEN		0x40
> +#define LOCOMO_ACC_XSEL0	0x00
> +#define LOCOMO_ACC_XSEL1	0x20
> +#define LOCOMO_ACC_MCLKEN	0x10
> +#define LOCOMO_ACC_64FSEN	0x08
> +#define LOCOMO_ACC_CLKSEL000	0x00	/* mclk  2 */
> +#define LOCOMO_ACC_CLKSEL001	0x01	/* mclk  3 */
> +#define LOCOMO_ACC_CLKSEL010	0x02	/* mclk  4 */
> +#define LOCOMO_ACC_CLKSEL011	0x03	/* mclk  6 */
> +#define LOCOMO_ACC_CLKSEL100	0x04	/* mclk  8 */
> +#define LOCOMO_ACC_CLKSEL101	0x05	/* mclk 12 */
> +
> +/* SPI interface */
> +#define LOCOMO_SPIMD	0x60		/* SPI mode setting */
> +#define LOCOMO_SPIMD_LOOPBACK BIT(15)	/* loopback tx to rx */
> +#define LOCOMO_SPIMD_MSB1ST   BIT(14)	/* send MSB first */
> +#define LOCOMO_SPIMD_DOSTAT   BIT(13)	/* transmit line is idle high */
> +#define LOCOMO_SPIMD_TCPOL    BIT(11)	/* transmit CPOL (maybe affects CPHA) */
> +#define LOCOMO_SPIMD_RCPOL    BIT(10)	/* receive CPOL (maybe affects CPHA) */
> +#define LOCOMO_SPIMD_TDINV    BIT(9)	/* invert transmit line */
> +#define LOCOMO_SPIMD_RDINV    BIT(8)	/* invert receive line */
> +#define LOCOMO_SPIMD_XON      BIT(7)	/* enable spi controller clock */
> +#define LOCOMO_SPIMD_XEN      BIT(6)	/* clock bit write enable */
> +#define LOCOMO_SPIMD_XSEL     0x0018	/* clock select */
> +/* xon must be off when enabling xen, wait 300 us before xon -> 1 */
> +#define CLOCK_18MHZ	      0		/* 18,432 MHz clock */
> +#define CLOCK_22MHZ	      1		/* 22,5792 MHz clock */
> +#define CLOCK_25MHZ	      2		/* 24,576 MHz clock */
> +#define LOCOMO_SPIMD_CLKSEL   0x7
> +#define DIV_1		      0		/* don't divide clock */
> +#define DIV_2		      1		/* divide clock by two */
> +#define DIV_4		      2		/* divide clock by four */
> +#define DIV_8		      3		/* divide clock by eight */
> +#define DIV_64		      4		/* divide clock by 64 */
> +
> +#define LOCOMO_SPICT	0x64		/* SPI mode control */
> +#define LOCOMO_SPICT_CRC16_7_B	BIT(15)	/* 0: crc16 1: crc7 */
> +#define LOCOMO_SPICT_CRCRX_TX_B	BIT(14)
> +#define LOCOMO_SPICT_CRCRESET_B	BIT(13)
> +#define LOCOMO_SPICT_CEN	BIT(7)	/* ?? enable */
> +#define LOCOMO_SPICT_CS		BIT(6)	/* chip select */
> +#define LOCOMO_SPICT_UNIT16	BIT(5)	/* 0: 8 bit, 1: 16 bit*/
> +#define LOCOMO_SPICT_ALIGNEN	BIT(2)	/* align transfer enable */
> +#define LOCOMO_SPICT_RXWEN	BIT(1)	/* continuous receive */
> +#define LOCOMO_SPICT_RXUEN	BIT(0)	/* aligned receive */
> +
> +#define LOCOMO_SPIST	0x68		/* SPI status */
> +#define LOCOMO_SPI_TEND		BIT(3)	/* Transfer end bit */
> +#define LOCOMO_SPI_REND		BIT(2)	/* Receive end bit */
> +#define LOCOMO_SPI_RFW		BIT(1)	/* write buffer bit */
> +#define LOCOMO_SPI_RFR		BIT(0)		/* read buffer bit */
> +
> +#define LOCOMO_SPIIS	0x70		/* SPI interrupt status */
> +#define LOCOMO_SPIWE	0x74		/* SPI interrupt status write enable */
> +#define LOCOMO_SPIIE	0x78		/* SPI interrupt enable */
> +#define LOCOMO_SPIIR	0x7c		/* SPI interrupt request */
> +#define LOCOMO_SPITD	0x80		/* SPI transfer data write */
> +#define LOCOMO_SPIRD	0x84		/* SPI receive data read */
> +#define LOCOMO_SPITS	0x88		/* SPI transfer data shift */
> +#define LOCOMO_SPIRS	0x8C		/* SPI receive data shift */
> +
> +/* GPIO */
> +#define LOCOMO_GPD	0x90	/* GPIO direction */
> +#define LOCOMO_GPE	0x94	/* GPIO input enable */
> +#define LOCOMO_GPL	0x98	/* GPIO level */
> +#define LOCOMO_GPO	0x9c	/* GPIO out data setting */
> +#define LOCOMO_GRIE	0xa0	/* GPIO rise detection */
> +#define LOCOMO_GFIE	0xa4	/* GPIO fall detection */
> +#define LOCOMO_GIS	0xa8	/* GPIO edge detection status */
> +#define LOCOMO_GWE	0xac	/* GPIO status write enable */
> +#define LOCOMO_GIE	0xb0	/* GPIO interrupt enable */
> +#define LOCOMO_GIR	0xb4	/* GPIO interrupt request */
> +
> +/* Front light adjustment controller */
> +#define LOCOMO_ALS	0xc8	/* Adjust light cycle */
> +#define LOCOMO_ALS_EN		0x8000
> +#define LOCOMO_ALD	0xcc	/* Adjust light duty */
> +
> +/* PCM audio interface */
> +#define LOCOMO_PAIF	0xd0	/* PCM audio interface */
> +#define LOCOMO_PAIF_SCINV	0x20
> +#define LOCOMO_PAIF_SCEN	0x10
> +#define LOCOMO_PAIF_LRCRST	0x08
> +#define LOCOMO_PAIF_LRCEVE	0x04
> +#define LOCOMO_PAIF_LRCINV	0x02
> +#define LOCOMO_PAIF_LRCEN	0x01
> +
> +/* Long time timer */
> +#define LOCOMO_LTC	0xd8		/* LTC interrupt setting */
> +#define LOCOMO_LTINT	0xdc		/* LTC interrupt */
> +
> +/* DAC control signal for LCD (COMADJ ) */
> +#define LOCOMO_DAC	0xe0
> +/* DAC control */
> +#define LOCOMO_DAC_SCLOEB	0x08	/* SCL pin output data       */
> +#define LOCOMO_DAC_TEST		0x04	/* Test bit                  */
> +#define LOCOMO_DAC_SDA		0x02	/* SDA pin level (read-only) */
> +#define LOCOMO_DAC_SDAOEB	0x01	/* SDA pin output data       */
> +
> +/* LED controller */
> +#define LOCOMO_LPT0	0xe8
> +#define LOCOMO_LPT1	0xec
> +#define LOCOMO_LPT_TOFH		0x80
> +#define LOCOMO_LPT_TOFL		0x08
> +#define LOCOMO_LPT_TOH(TOH)	((TOH & 0x7) << 4)
> +#define LOCOMO_LPT_TOL(TOL)	((TOL & 0x7))
> +
> +struct locomo_gpio_platform_data {
> +	unsigned int gpio_base;
> +};
> +
> +struct locomo_lcd_platform_data {
> +	u8 comadj;
> +};
> +
> +struct locomo_platform_data {
> +	unsigned int gpio_base;
> +	u8 comadj;
> +};
> +
> +#endif
Dmitry Eremin-Solenikov May 27, 2015, 2:55 p.m. UTC | #2
2015-05-27 13:27 GMT+03:00 Lee Jones <lee.jones@linaro.org>:
> On Mon, 25 May 2015, Dmitry Eremin-Solenikov wrote:
>
>> LoCoMo is a GA used on Sharp Zaurus SL-5x00. Current driver does has
>> several design issues (special bus instead of platform bus, doesn't use
>> mfd-core, etc).
>>
>> Implement 'core' parts of locomo support as an mfd driver.
>>
>> Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
>> ---
>
> These things are much easier to re-review if you keep a change-log
> here.
>
>>  drivers/mfd/Kconfig        |  10 ++
>>  drivers/mfd/Makefile       |   1 +
>>  drivers/mfd/locomo.c       | 336 +++++++++++++++++++++++++++++++++++++++++++++
>>  include/linux/mfd/locomo.h | 169 +++++++++++++++++++++++
>>  4 files changed, 516 insertions(+)
>>  create mode 100644 drivers/mfd/locomo.c
>>  create mode 100644 include/linux/mfd/locomo.h
>
> Looks good now though:
>   Acked-by: Lee Jones <lee.jones@linaro.org>
>
> How do you plan for this to be merged?

I'd like for this to be merged either through mfd tree or through the
arm-soc (or rmk's ARM) tree.
Some of the respective maintainers already gave their blessing for
this patchset to be merged
not through their subsystem trees.

[skipped the patch]
Linus Walleij June 2, 2015, 11:33 a.m. UTC | #3
On Thu, May 28, 2015 at 9:07 PM, Dmitry Eremin-Solenikov
<dbaryshkov@gmail.com> wrote:

> * Linus, can I assume that yours 'Reviewed-by' mean
>   'Acked-by' for the GPIO-related parts?

Yes.

Yours,
Linus Walleij
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diff mbox

Patch

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index d5ad04d..8c33940 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -1430,6 +1430,16 @@  config MFD_STW481X
 	  in various ST Microelectronics and ST-Ericsson embedded
 	  Nomadik series.
 
+config MFD_LOCOMO
+	bool "Sharp LoCoMo support"
+	depends on ARM
+	select MFD_CORE
+	select IRQ_DOMAIN
+	select REGMAP_MMIO
+	help
+	  Support for Sharp LoCoMo Grid Array found in Sharp SL-5x00
+          PDA family.
+
 menu "Multimedia Capabilities Port drivers"
 	depends on ARCH_SA1100
 
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 0e5cfeb..6c23b73 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -181,6 +181,7 @@  obj-$(CONFIG_MFD_HI6421_PMIC)	+= hi6421-pmic-core.o
 obj-$(CONFIG_MFD_DLN2)		+= dln2.o
 obj-$(CONFIG_MFD_RT5033)	+= rt5033.o
 obj-$(CONFIG_MFD_SKY81452)	+= sky81452.o
+obj-$(CONFIG_MFD_LOCOMO)	+= locomo.o
 
 intel-soc-pmic-objs		:= intel_soc_pmic_core.o intel_soc_pmic_crc.o
 obj-$(CONFIG_INTEL_SOC_PMIC)	+= intel-soc-pmic.o
diff --git a/drivers/mfd/locomo.c b/drivers/mfd/locomo.c
new file mode 100644
index 0000000..4682893
--- /dev/null
+++ b/drivers/mfd/locomo.c
@@ -0,0 +1,336 @@ 
+/*
+ * Sharp LoCoMo support
+ *
+ * (C) Copyright 2015 Dmitry Eremin-Solenikov
+ *
+ * Based on old driver at arch/arm/common/locomo.c
+ *
+ * (C) Copyright 2004 John Lenz
+ *
+ * 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 file contains all generic LoCoMo support.
+ *
+ * All initialization functions provided here are intended to be called
+ * from machine specific code with proper arguments when required.
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/kernel.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/locomo.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+/* LoCoMo Interrupts */
+#define IRQ_LOCOMO_KEY		0
+#define IRQ_LOCOMO_GPIO		1
+#define IRQ_LOCOMO_LT		2
+#define IRQ_LOCOMO_SPI		3
+
+#define LOCOMO_NR_IRQS		4
+
+/* The following is the overall data for the locomo chip */
+struct locomo {
+	struct device *dev;
+	unsigned int irq;
+	spinlock_t lock;
+	struct irq_domain *domain;
+	struct regmap *regmap;
+};
+
+static struct resource locomo_kbd_resources[] = {
+	DEFINE_RES_IRQ(IRQ_LOCOMO_KEY),
+};
+
+static struct resource locomo_gpio_resources[] = {
+	DEFINE_RES_IRQ(IRQ_LOCOMO_GPIO),
+};
+
+/* Filled in locomo_probe() function, will be kmemduped by platform core */
+static struct locomo_gpio_platform_data locomo_gpio_pdata;
+
+static struct resource locomo_lt_resources[] = {
+	DEFINE_RES_IRQ(IRQ_LOCOMO_LT),
+};
+
+static struct resource locomo_spi_resources[] = {
+	DEFINE_RES_IRQ(IRQ_LOCOMO_SPI),
+};
+
+/* Filled in locomo_probe() function, will be kmemduped by platform core */
+static struct locomo_lcd_platform_data locomo_lcd_pdata;
+
+static struct mfd_cell locomo_cells[] = {
+	{
+		.name = "locomo-kbd",
+		.resources = locomo_kbd_resources,
+		.num_resources = ARRAY_SIZE(locomo_kbd_resources),
+	},
+	{
+		.name = "locomo-gpio",
+		.resources = locomo_gpio_resources,
+		.num_resources = ARRAY_SIZE(locomo_gpio_resources),
+		.platform_data = &locomo_gpio_pdata,
+		.pdata_size = sizeof(locomo_gpio_pdata),
+	},
+	{
+		.name = "locomo-lt", /* Long time timer */
+		.resources = locomo_lt_resources,
+		.num_resources = ARRAY_SIZE(locomo_lt_resources),
+	},
+	{
+		.name = "locomo-spi",
+		.resources = locomo_spi_resources,
+		.num_resources = ARRAY_SIZE(locomo_spi_resources),
+	},
+	{
+		.name = "locomo-lcd",
+		.platform_data = &locomo_lcd_pdata,
+		.pdata_size = sizeof(locomo_lcd_pdata),
+	},
+	{ .name = "locomo-led", },
+	{ .name = "locomo-backlight", },
+	{ .name = "locomo-i2c", },
+};
+
+/*
+ * IRQ support
+ */
+static void locomo_handler(unsigned int irq, struct irq_desc *desc)
+{
+	struct locomo *ldev = irq_get_handler_data(irq);
+	struct irq_chip *irqchip = irq_desc_get_chip(desc);
+	unsigned int req;
+
+	chained_irq_enter(irqchip, desc);
+
+	/* Check why this interrupt was generated */
+	while (1) {
+		regmap_read(ldev->regmap, LOCOMO_ICR, &req);
+		req >>= LOCOMO_ICR_STATUS_SHIFT;
+
+		if (!req)
+			break;
+
+		irq = ffs(req) - 1;
+		generic_handle_irq(irq_find_mapping(ldev->domain, irq));
+	}
+
+	chained_irq_exit(irqchip, desc);
+}
+
+static void locomo_mask_irq(struct irq_data *d)
+{
+	struct locomo *ldev = irq_data_get_irq_chip_data(d);
+	unsigned int mask = BIT(d->hwirq + LOCOMO_ICR_MASK_SHIFT);
+
+	regmap_update_bits(ldev->regmap, LOCOMO_ICR, mask, 0);
+}
+
+static void locomo_unmask_irq(struct irq_data *d)
+{
+	struct locomo *ldev = irq_data_get_irq_chip_data(d);
+	unsigned int mask = BIT(d->hwirq + LOCOMO_ICR_MASK_SHIFT);
+
+	regmap_update_bits(ldev->regmap, LOCOMO_ICR, mask, mask);
+}
+
+static struct irq_chip locomo_chip = {
+	.name		= "locomo",
+	.irq_mask	= locomo_mask_irq,
+	.irq_unmask	= locomo_unmask_irq,
+};
+
+static int locomo_irq_map(struct irq_domain *d, unsigned int virq,
+				irq_hw_number_t hwirq)
+{
+	struct locomo *locomo = d->host_data;
+
+	irq_set_chip_data(virq, locomo);
+	irq_set_chip_and_handler(virq, &locomo_chip, handle_level_irq);
+	set_irq_flags(virq, IRQF_VALID);
+
+	return 0;
+}
+
+static void locomo_irq_unmap(struct irq_domain *d, unsigned int virq)
+{
+	set_irq_flags(virq, 0);
+	irq_set_chip_and_handler(virq, NULL, NULL);
+	irq_set_chip_data(virq, NULL);
+}
+
+static struct irq_domain_ops locomo_irq_ops = {
+	.map    = locomo_irq_map,
+	.unmap  = locomo_irq_unmap,
+	.xlate  = irq_domain_xlate_onecell,
+};
+
+static int locomo_setup_irq(struct locomo *ldev)
+{
+	ldev->domain = irq_domain_add_simple(NULL, LOCOMO_NR_IRQS, 0,
+					     &locomo_irq_ops, ldev);
+	if (!ldev->domain)
+		return -ENOMEM;
+
+	/*
+	 * Install handler for IRQ_LOCOMO_HW.
+	 */
+	irq_set_irq_type(ldev->irq, IRQ_TYPE_EDGE_FALLING);
+	irq_set_handler_data(ldev->irq, ldev);
+	irq_set_chained_handler(ldev->irq, locomo_handler);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int locomo_suspend(struct device *dev)
+{
+	struct locomo *ldev = dev_get_drvdata(dev);
+
+	/* Audio */
+	regmap_write(ldev->regmap, LOCOMO_PAIF, 0x00);
+
+	/*
+	 * Original code disabled the clock depending on leds settings
+	 * However we disable leds before suspend, thus it's safe
+	 * to just assume this setting.
+	 */
+	/* CLK32 off */
+	regmap_write(ldev->regmap, LOCOMO_C32K, 0x00);
+
+	/* 22MHz/24MHz clock off */
+	regmap_write(ldev->regmap, LOCOMO_ACC, 0x00);
+
+	return 0;
+}
+
+static int locomo_resume(struct device *dev)
+{
+	struct locomo *ldev = dev_get_drvdata(dev);
+
+	regmap_write(ldev->regmap, LOCOMO_C32K, 0x00);
+
+	return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(locomo_pm, locomo_suspend, locomo_resume);
+
+static const struct regmap_config locomo_regmap_config = {
+	.name = "LoCoMo",
+	.reg_bits = 8,
+	.reg_stride = 4,
+	.val_bits = 16,
+	.cache_type = REGCACHE_NONE,
+	.max_register = 0xec,
+};
+
+static int locomo_probe(struct platform_device *pdev)
+{
+	struct locomo_platform_data *pdata = dev_get_platdata(&pdev->dev);
+	struct resource *res;
+	void __iomem *base;
+	struct locomo *ldev;
+	unsigned int rev;
+	int ret;
+
+	ldev = devm_kzalloc(&pdev->dev, sizeof(*ldev), GFP_KERNEL);
+	if (!ldev)
+		return -ENOMEM;
+
+	spin_lock_init(&ldev->lock);
+	ldev->dev = &pdev->dev;
+
+	ldev->irq = platform_get_irq(pdev, 0);
+	if (ldev->irq < 0)
+		return ldev->irq;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	ldev->regmap = devm_regmap_init_mmio(&pdev->dev, base,
+					      &locomo_regmap_config);
+	if (IS_ERR(ldev->regmap))
+		return PTR_ERR(ldev->regmap);
+
+	if (pdata) {
+		locomo_gpio_pdata.gpio_base = pdata->gpio_base;
+		locomo_lcd_pdata.comadj = pdata->comadj;
+	} else {
+		locomo_gpio_pdata.gpio_base = -1;
+		locomo_lcd_pdata.comadj = 128;
+	}
+
+	platform_set_drvdata(pdev, ldev);
+
+	regmap_read(ldev->regmap, LOCOMO_VER, &rev);
+	dev_info(&pdev->dev, "LoCoMo Chip: %04x\n", rev);
+
+	/* Clear IRQ status and mask */
+	regmap_write(ldev->regmap, LOCOMO_ICR, 0);
+
+	/* Longtime timer */
+	regmap_write(ldev->regmap, LOCOMO_LTINT, 0);
+
+	ret = locomo_setup_irq(ldev);
+	if (ret)
+		return ret;
+
+	ret = mfd_add_devices(&pdev->dev, pdev->id,
+			locomo_cells, ARRAY_SIZE(locomo_cells),
+			res, -1, ldev->domain);
+	if (ret)
+		goto err;
+
+	return 0;
+
+err:
+	irq_set_chained_handler(ldev->irq, NULL);
+	irq_set_handler_data(ldev->irq, NULL);
+
+	irq_domain_remove(ldev->domain);
+
+	return ret;
+}
+
+static int locomo_remove(struct platform_device *dev)
+{
+	struct locomo *ldev = platform_get_drvdata(dev);
+
+	mfd_remove_devices(&dev->dev);
+
+	irq_set_chained_handler(ldev->irq, NULL);
+	irq_set_handler_data(ldev->irq, NULL);
+
+	irq_domain_remove(ldev->domain);
+
+	return 0;
+}
+
+static struct platform_driver locomo_device_driver = {
+	.probe	= locomo_probe,
+	.remove	= locomo_remove,
+	.driver	= {
+		.name	= "locomo",
+		.pm	= &locomo_pm,
+	},
+};
+
+module_platform_driver(locomo_device_driver);
+
+MODULE_DESCRIPTION("Sharp LoCoMo core driver");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
+MODULE_ALIAS("platform:locomo");
diff --git a/include/linux/mfd/locomo.h b/include/linux/mfd/locomo.h
new file mode 100644
index 0000000..999e3de
--- /dev/null
+++ b/include/linux/mfd/locomo.h
@@ -0,0 +1,169 @@ 
+/*
+ * This file contains the definitions for the LoCoMo G/A Chip
+ *
+ * (C) Copyright 2015 Dmitry Eremin-Solenikov
+ * (C) Copyright 2004 John Lenz
+ *
+ * May be copied or modified under the terms of the GNU General Public
+ * License.  See linux/COPYING for more information.
+ *
+ * Based on sa1111.h
+ */
+
+#ifndef _ASM_ARCH_LOCOMO
+#define _ASM_ARCH_LOCOMO
+
+/* LOCOMO chip version */
+#define LOCOMO_VER	0x00
+
+/* Pin status */
+#define LOCOMO_ST	0x04
+
+/* Pin status */
+#define LOCOMO_C32K	0x08
+
+/* Interrupt controller */
+#define LOCOMO_ICR	0x0c
+#define LOCOMO_ICR_MASK_SHIFT	4
+#define LOCOMO_ICR_STATUS_SHIFT	8
+
+/* Touch panel controller */
+#define LOCOMO_ASD	0x20		/* AD start delay */
+#define LOCOMO_HSD	0x28		/* HSYS delay */
+#define LOCOMO_HSC	0x2c		/* HSYS period */
+#define LOCOMO_TADC	0x30		/* tablet ADC clock */
+
+/* Backlight controller: TFT signal */
+#define LOCOMO_TC	0x38		/* TFT control signal */
+#define LOCOMO_CPSD	0x3c		/* CPS delay */
+
+/* Keyboard controller */
+#define LOCOMO_KIB	0x40	/* KIB level */
+#define LOCOMO_KSC	0x44	/* KSTRB control */
+#define LOCOMO_KCMD	0x48	/* KSTRB command */
+#define LOCOMO_KIC	0x4c	/* Key interrupt */
+
+/* Audio clock */
+#define LOCOMO_ACC	0x54	/* Audio clock */
+#define LOCOMO_ACC_XON		0x80
+#define LOCOMO_ACC_XEN		0x40
+#define LOCOMO_ACC_XSEL0	0x00
+#define LOCOMO_ACC_XSEL1	0x20
+#define LOCOMO_ACC_MCLKEN	0x10
+#define LOCOMO_ACC_64FSEN	0x08
+#define LOCOMO_ACC_CLKSEL000	0x00	/* mclk  2 */
+#define LOCOMO_ACC_CLKSEL001	0x01	/* mclk  3 */
+#define LOCOMO_ACC_CLKSEL010	0x02	/* mclk  4 */
+#define LOCOMO_ACC_CLKSEL011	0x03	/* mclk  6 */
+#define LOCOMO_ACC_CLKSEL100	0x04	/* mclk  8 */
+#define LOCOMO_ACC_CLKSEL101	0x05	/* mclk 12 */
+
+/* SPI interface */
+#define LOCOMO_SPIMD	0x60		/* SPI mode setting */
+#define LOCOMO_SPIMD_LOOPBACK BIT(15)	/* loopback tx to rx */
+#define LOCOMO_SPIMD_MSB1ST   BIT(14)	/* send MSB first */
+#define LOCOMO_SPIMD_DOSTAT   BIT(13)	/* transmit line is idle high */
+#define LOCOMO_SPIMD_TCPOL    BIT(11)	/* transmit CPOL (maybe affects CPHA) */
+#define LOCOMO_SPIMD_RCPOL    BIT(10)	/* receive CPOL (maybe affects CPHA) */
+#define LOCOMO_SPIMD_TDINV    BIT(9)	/* invert transmit line */
+#define LOCOMO_SPIMD_RDINV    BIT(8)	/* invert receive line */
+#define LOCOMO_SPIMD_XON      BIT(7)	/* enable spi controller clock */
+#define LOCOMO_SPIMD_XEN      BIT(6)	/* clock bit write enable */
+#define LOCOMO_SPIMD_XSEL     0x0018	/* clock select */
+/* xon must be off when enabling xen, wait 300 us before xon -> 1 */
+#define CLOCK_18MHZ	      0		/* 18,432 MHz clock */
+#define CLOCK_22MHZ	      1		/* 22,5792 MHz clock */
+#define CLOCK_25MHZ	      2		/* 24,576 MHz clock */
+#define LOCOMO_SPIMD_CLKSEL   0x7
+#define DIV_1		      0		/* don't divide clock */
+#define DIV_2		      1		/* divide clock by two */
+#define DIV_4		      2		/* divide clock by four */
+#define DIV_8		      3		/* divide clock by eight */
+#define DIV_64		      4		/* divide clock by 64 */
+
+#define LOCOMO_SPICT	0x64		/* SPI mode control */
+#define LOCOMO_SPICT_CRC16_7_B	BIT(15)	/* 0: crc16 1: crc7 */
+#define LOCOMO_SPICT_CRCRX_TX_B	BIT(14)
+#define LOCOMO_SPICT_CRCRESET_B	BIT(13)
+#define LOCOMO_SPICT_CEN	BIT(7)	/* ?? enable */
+#define LOCOMO_SPICT_CS		BIT(6)	/* chip select */
+#define LOCOMO_SPICT_UNIT16	BIT(5)	/* 0: 8 bit, 1: 16 bit*/
+#define LOCOMO_SPICT_ALIGNEN	BIT(2)	/* align transfer enable */
+#define LOCOMO_SPICT_RXWEN	BIT(1)	/* continuous receive */
+#define LOCOMO_SPICT_RXUEN	BIT(0)	/* aligned receive */
+
+#define LOCOMO_SPIST	0x68		/* SPI status */
+#define LOCOMO_SPI_TEND		BIT(3)	/* Transfer end bit */
+#define LOCOMO_SPI_REND		BIT(2)	/* Receive end bit */
+#define LOCOMO_SPI_RFW		BIT(1)	/* write buffer bit */
+#define LOCOMO_SPI_RFR		BIT(0)		/* read buffer bit */
+
+#define LOCOMO_SPIIS	0x70		/* SPI interrupt status */
+#define LOCOMO_SPIWE	0x74		/* SPI interrupt status write enable */
+#define LOCOMO_SPIIE	0x78		/* SPI interrupt enable */
+#define LOCOMO_SPIIR	0x7c		/* SPI interrupt request */
+#define LOCOMO_SPITD	0x80		/* SPI transfer data write */
+#define LOCOMO_SPIRD	0x84		/* SPI receive data read */
+#define LOCOMO_SPITS	0x88		/* SPI transfer data shift */
+#define LOCOMO_SPIRS	0x8C		/* SPI receive data shift */
+
+/* GPIO */
+#define LOCOMO_GPD	0x90	/* GPIO direction */
+#define LOCOMO_GPE	0x94	/* GPIO input enable */
+#define LOCOMO_GPL	0x98	/* GPIO level */
+#define LOCOMO_GPO	0x9c	/* GPIO out data setting */
+#define LOCOMO_GRIE	0xa0	/* GPIO rise detection */
+#define LOCOMO_GFIE	0xa4	/* GPIO fall detection */
+#define LOCOMO_GIS	0xa8	/* GPIO edge detection status */
+#define LOCOMO_GWE	0xac	/* GPIO status write enable */
+#define LOCOMO_GIE	0xb0	/* GPIO interrupt enable */
+#define LOCOMO_GIR	0xb4	/* GPIO interrupt request */
+
+/* Front light adjustment controller */
+#define LOCOMO_ALS	0xc8	/* Adjust light cycle */
+#define LOCOMO_ALS_EN		0x8000
+#define LOCOMO_ALD	0xcc	/* Adjust light duty */
+
+/* PCM audio interface */
+#define LOCOMO_PAIF	0xd0	/* PCM audio interface */
+#define LOCOMO_PAIF_SCINV	0x20
+#define LOCOMO_PAIF_SCEN	0x10
+#define LOCOMO_PAIF_LRCRST	0x08
+#define LOCOMO_PAIF_LRCEVE	0x04
+#define LOCOMO_PAIF_LRCINV	0x02
+#define LOCOMO_PAIF_LRCEN	0x01
+
+/* Long time timer */
+#define LOCOMO_LTC	0xd8		/* LTC interrupt setting */
+#define LOCOMO_LTINT	0xdc		/* LTC interrupt */
+
+/* DAC control signal for LCD (COMADJ ) */
+#define LOCOMO_DAC	0xe0
+/* DAC control */
+#define LOCOMO_DAC_SCLOEB	0x08	/* SCL pin output data       */
+#define LOCOMO_DAC_TEST		0x04	/* Test bit                  */
+#define LOCOMO_DAC_SDA		0x02	/* SDA pin level (read-only) */
+#define LOCOMO_DAC_SDAOEB	0x01	/* SDA pin output data       */
+
+/* LED controller */
+#define LOCOMO_LPT0	0xe8
+#define LOCOMO_LPT1	0xec
+#define LOCOMO_LPT_TOFH		0x80
+#define LOCOMO_LPT_TOFL		0x08
+#define LOCOMO_LPT_TOH(TOH)	((TOH & 0x7) << 4)
+#define LOCOMO_LPT_TOL(TOL)	((TOL & 0x7))
+
+struct locomo_gpio_platform_data {
+	unsigned int gpio_base;
+};
+
+struct locomo_lcd_platform_data {
+	u8 comadj;
+};
+
+struct locomo_platform_data {
+	unsigned int gpio_base;
+	u8 comadj;
+};
+
+#endif