[deliverable/linux.git] / drivers / gpio / gpio-tps65912.c

/*
 * Copyright 2011 Texas Instruments Inc.
 *
 * Author: Margarita Olaya <magi@slimlogic.co.uk>
 *
 *  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 driver is based on wm8350 implementation.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/gpio.h>
#include <linux/mfd/core.h>
#include <linux/platform_device.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/mfd/tps65912.h>

struct tps65912_gpio_data {
	struct tps65912 *tps65912;
	struct gpio_chip gpio_chip;
};

#define to_tgd(gc) container_of(gc, struct tps65912_gpio_data, gpio_chip)

static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)
{
	struct tps65912_gpio_data *tps65912_gpio = to_tgd(gc);
	struct tps65912 *tps65912 = tps65912_gpio->tps65912;
	int val;

	val = tps65912_reg_read(tps65912, TPS65912_GPIO1 + offset);

	if (val & GPIO_STS_MASK)
		return 1;

	return 0;
}

static void tps65912_gpio_set(struct gpio_chip *gc, unsigned offset,
			      int value)
{
	struct tps65912_gpio_data *tps65912_gpio = to_tgd(gc);
	struct tps65912 *tps65912 = tps65912_gpio->tps65912;

	if (value)
		tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
							GPIO_SET_MASK);
	else
		tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
								GPIO_SET_MASK);
}

static int tps65912_gpio_output(struct gpio_chip *gc, unsigned offset,
				int value)
{
	struct tps65912_gpio_data *tps65912_gpio = to_tgd(gc);
	struct tps65912 *tps65912 = tps65912_gpio->tps65912;

	/* Set the initial value */
	tps65912_gpio_set(gc, offset, value);

	return tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
								GPIO_CFG_MASK);
}

static int tps65912_gpio_input(struct gpio_chip *gc, unsigned offset)
{
	struct tps65912_gpio_data *tps65912_gpio = to_tgd(gc);
	struct tps65912 *tps65912 = tps65912_gpio->tps65912;

	return tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
								GPIO_CFG_MASK);
}

static struct gpio_chip template_chip = {
	.label			= "tps65912",
	.owner			= THIS_MODULE,
	.direction_input	= tps65912_gpio_input,
	.direction_output	= tps65912_gpio_output,
	.get			= tps65912_gpio_get,
	.set			= tps65912_gpio_set,
	.can_sleep		= true,
	.ngpio			= 5,
	.base			= -1,
};

static int tps65912_gpio_probe(struct platform_device *pdev)
{
	struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
	struct tps65912_board *pdata = dev_get_platdata(tps65912->dev);
	struct tps65912_gpio_data *tps65912_gpio;
	int ret;

	tps65912_gpio = devm_kzalloc(&pdev->dev, sizeof(*tps65912_gpio),
				     GFP_KERNEL);
	if (tps65912_gpio == NULL)
		return -ENOMEM;

	tps65912_gpio->tps65912 = tps65912;
	tps65912_gpio->gpio_chip = template_chip;
	tps65912_gpio->gpio_chip.dev = &pdev->dev;
	if (pdata && pdata->gpio_base)
		tps65912_gpio->gpio_chip.base = pdata->gpio_base;

	ret = gpiochip_add(&tps65912_gpio->gpio_chip);
	if (ret < 0) {
		dev_err(&pdev->dev, "Failed to register gpiochip, %d\n", ret);
		return ret;
	}

	platform_set_drvdata(pdev, tps65912_gpio);

	return ret;
}

static int tps65912_gpio_remove(struct platform_device *pdev)
{
	struct tps65912_gpio_data  *tps65912_gpio = platform_get_drvdata(pdev);

	gpiochip_remove(&tps65912_gpio->gpio_chip);
	return 0;
}

static struct platform_driver tps65912_gpio_driver = {
	.driver = {
		.name = "tps65912-gpio",
	},
	.probe = tps65912_gpio_probe,
	.remove = tps65912_gpio_remove,
};

static int __init tps65912_gpio_init(void)
{
	return platform_driver_register(&tps65912_gpio_driver);
}
subsys_initcall(tps65912_gpio_init);

static void __exit tps65912_gpio_exit(void)
{
	platform_driver_unregister(&tps65912_gpio_driver);
}
module_exit(tps65912_gpio_exit);

MODULE_AUTHOR("Margarita Olaya Cabrera <magi@slimlogic.co.uk>");
MODULE_DESCRIPTION("GPIO interface for TPS65912 PMICs");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:tps65912-gpio");
Commit	Line	Data
	1	/*
	2	* Copyright 2011 Texas Instruments Inc.
	3	*
	4	* Author: Margarita Olaya <magi@slimlogic.co.uk>
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* Free Software Foundation; either version 2 of the License, or (at your
	9	* option) any later version.
	10	*
	11	* This driver is based on wm8350 implementation.
	12	*/
	13
	14	#include <linux/kernel.h>
	15	#include <linux/module.h>
	16	#include <linux/errno.h>
	17	#include <linux/gpio.h>
	18	#include <linux/mfd/core.h>
	19	#include <linux/platform_device.h>
	20	#include <linux/seq_file.h>
	21	#include <linux/slab.h>
	22	#include <linux/mfd/tps65912.h>
	23
	24	struct tps65912_gpio_data {
	25	struct tps65912 *tps65912;
	26	struct gpio_chip gpio_chip;
	27	};
	28
	29	#define to_tgd(gc) container_of(gc, struct tps65912_gpio_data, gpio_chip)
	30
	31	static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)
	32	{
	33	struct tps65912_gpio_data *tps65912_gpio = to_tgd(gc);
	34	struct tps65912 *tps65912 = tps65912_gpio->tps65912;
	35	int val;
	36
	37	val = tps65912_reg_read(tps65912, TPS65912_GPIO1 + offset);
	38
	39	if (val & GPIO_STS_MASK)
	40	return 1;
	41
	42	return 0;
	43	}
	44
	45	static void tps65912_gpio_set(struct gpio_chip *gc, unsigned offset,
	46	int value)
	47	{
	48	struct tps65912_gpio_data *tps65912_gpio = to_tgd(gc);
	49	struct tps65912 *tps65912 = tps65912_gpio->tps65912;
	50
	51	if (value)
	52	tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
	53	GPIO_SET_MASK);
	54	else
	55	tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
	56	GPIO_SET_MASK);
	57	}
	58
	59	static int tps65912_gpio_output(struct gpio_chip *gc, unsigned offset,
	60	int value)
	61	{
	62	struct tps65912_gpio_data *tps65912_gpio = to_tgd(gc);
	63	struct tps65912 *tps65912 = tps65912_gpio->tps65912;
	64
	65	/* Set the initial value */
	66	tps65912_gpio_set(gc, offset, value);
	67
	68	return tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
	69	GPIO_CFG_MASK);
	70	}
	71
	72	static int tps65912_gpio_input(struct gpio_chip *gc, unsigned offset)
	73	{
	74	struct tps65912_gpio_data *tps65912_gpio = to_tgd(gc);
	75	struct tps65912 *tps65912 = tps65912_gpio->tps65912;
	76
	77	return tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
	78	GPIO_CFG_MASK);
	79	}
	80
	81	static struct gpio_chip template_chip = {
	82	.label = "tps65912",
	83	.owner = THIS_MODULE,
	84	.direction_input = tps65912_gpio_input,
	85	.direction_output = tps65912_gpio_output,
	86	.get = tps65912_gpio_get,
	87	.set = tps65912_gpio_set,
	88	.can_sleep = true,
	89	.ngpio = 5,
	90	.base = -1,
	91	};
	92
	93	static int tps65912_gpio_probe(struct platform_device *pdev)
	94	{
	95	struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
	96	struct tps65912_board *pdata = dev_get_platdata(tps65912->dev);
	97	struct tps65912_gpio_data *tps65912_gpio;
	98	int ret;
	99
	100	tps65912_gpio = devm_kzalloc(&pdev->dev, sizeof(*tps65912_gpio),
	101	GFP_KERNEL);
	102	if (tps65912_gpio == NULL)
	103	return -ENOMEM;
	104
	105	tps65912_gpio->tps65912 = tps65912;
	106	tps65912_gpio->gpio_chip = template_chip;
	107	tps65912_gpio->gpio_chip.dev = &pdev->dev;
	108	if (pdata && pdata->gpio_base)
	109	tps65912_gpio->gpio_chip.base = pdata->gpio_base;
	110
	111	ret = gpiochip_add(&tps65912_gpio->gpio_chip);
	112	if (ret < 0) {
	113	dev_err(&pdev->dev, "Failed to register gpiochip, %d\n", ret);
	114	return ret;
	115	}
	116
	117	platform_set_drvdata(pdev, tps65912_gpio);
	118
	119	return ret;
	120	}
	121
	122	static int tps65912_gpio_remove(struct platform_device *pdev)
	123	{
	124	struct tps65912_gpio_data *tps65912_gpio = platform_get_drvdata(pdev);
	125
	126	gpiochip_remove(&tps65912_gpio->gpio_chip);
	127	return 0;
	128	}
	129
	130	static struct platform_driver tps65912_gpio_driver = {
	131	.driver = {
	132	.name = "tps65912-gpio",
	133	},
	134	.probe = tps65912_gpio_probe,
	135	.remove = tps65912_gpio_remove,
	136	};
	137
	138	static int __init tps65912_gpio_init(void)
	139	{
	140	return platform_driver_register(&tps65912_gpio_driver);
	141	}
	142	subsys_initcall(tps65912_gpio_init);
	143
	144	static void __exit tps65912_gpio_exit(void)
	145	{
	146	platform_driver_unregister(&tps65912_gpio_driver);
	147	}
	148	module_exit(tps65912_gpio_exit);
	149
	150	MODULE_AUTHOR("Margarita Olaya Cabrera <magi@slimlogic.co.uk>");
	151	MODULE_DESCRIPTION("GPIO interface for TPS65912 PMICs");
	152	MODULE_LICENSE("GPL v2");
	153	MODULE_ALIAS("platform:tps65912-gpio");