[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;
};

static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)
{
	struct tps65912_gpio_data *tps65912_gpio = gpiochip_get_data(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 = gpiochip_get_data(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 = gpiochip_get_data(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 = gpiochip_get_data(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.parent = &pdev->dev;
	if (pdata && pdata->gpio_base)
		tps65912_gpio->gpio_chip.base = pdata->gpio_base;

	ret = gpiochip_add_data(&tps65912_gpio->gpio_chip, tps65912_gpio);
	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
668a6cc7 MO	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	static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)
	30	{
ad8dd23c	31	struct tps65912_gpio_data *tps65912_gpio = gpiochip_get_data(gc);
2f97c20e	32	struct tps65912 *tps65912 = tps65912_gpio->tps65912;
668a6cc7 MO	33	int val;
	34
	35	val = tps65912_reg_read(tps65912, TPS65912_GPIO1 + offset);
	36
	37	if (val & GPIO_STS_MASK)
	38	return 1;
	39
	40	return 0;
	41	}
	42
	43	static void tps65912_gpio_set(struct gpio_chip *gc, unsigned offset,
	44	int value)
	45	{
ad8dd23c	46	struct tps65912_gpio_data *tps65912_gpio = gpiochip_get_data(gc);
2f97c20e	47	struct tps65912 *tps65912 = tps65912_gpio->tps65912;
668a6cc7 MO	48
	49	if (value)
	50	tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
	51	GPIO_SET_MASK);
	52	else
	53	tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
	54	GPIO_SET_MASK);
	55	}
	56
	57	static int tps65912_gpio_output(struct gpio_chip *gc, unsigned offset,
	58	int value)
	59	{
ad8dd23c	60	struct tps65912_gpio_data *tps65912_gpio = gpiochip_get_data(gc);
2f97c20e	61	struct tps65912 *tps65912 = tps65912_gpio->tps65912;
668a6cc7 MO	62
	63	/* Set the initial value */
	64	tps65912_gpio_set(gc, offset, value);
	65
	66	return tps65912_set_bits(tps65912, TPS65912_GPIO1 + offset,
	67	GPIO_CFG_MASK);
	68	}
	69
	70	static int tps65912_gpio_input(struct gpio_chip *gc, unsigned offset)
	71	{
ad8dd23c	72	struct tps65912_gpio_data *tps65912_gpio = gpiochip_get_data(gc);
2f97c20e	73	struct tps65912 *tps65912 = tps65912_gpio->tps65912;
668a6cc7 MO	74
	75	return tps65912_clear_bits(tps65912, TPS65912_GPIO1 + offset,
	76	GPIO_CFG_MASK);
668a6cc7 MO	77	}
	78
	79	static struct gpio_chip template_chip = {
	80	.label = "tps65912",
	81	.owner = THIS_MODULE,
	82	.direction_input = tps65912_gpio_input,
	83	.direction_output = tps65912_gpio_output,
	84	.get = tps65912_gpio_get,
	85	.set = tps65912_gpio_set,
9fb1f39e	86	.can_sleep = true,
668a6cc7 MO	87	.ngpio = 5,
	88	.base = -1,
	89	};
	90
3836309d	91	static int tps65912_gpio_probe(struct platform_device *pdev)
668a6cc7 MO	92	{
668a6cc7 MO	93	struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
e56aee18	94	struct tps65912_board *pdata = dev_get_platdata(tps65912->dev);
668a6cc7 MO	95	struct tps65912_gpio_data *tps65912_gpio;
	96	int ret;
	97
45e253a7 AL	98	tps65912_gpio = devm_kzalloc(&pdev->dev, sizeof(*tps65912_gpio),
45e253a7 AL	99	GFP_KERNEL);
668a6cc7 MO	100	if (tps65912_gpio == NULL)
	101	return -ENOMEM;
	102
	103	tps65912_gpio->tps65912 = tps65912;
	104	tps65912_gpio->gpio_chip = template_chip;
58383c78	105	tps65912_gpio->gpio_chip.parent = &pdev->dev;
668a6cc7 MO	106	if (pdata && pdata->gpio_base)
	107	tps65912_gpio->gpio_chip.base = pdata->gpio_base;
	108
ad8dd23c	109	ret = gpiochip_add_data(&tps65912_gpio->gpio_chip, tps65912_gpio);
668a6cc7 MO	110	if (ret < 0) {
668a6cc7 MO	111	dev_err(&pdev->dev, "Failed to register gpiochip, %d\n", ret);
45e253a7	112	return ret;
668a6cc7 MO	113	}
	114
	115	platform_set_drvdata(pdev, tps65912_gpio);
	116
	117	return ret;
668a6cc7 MO	118	}
668a6cc7 MO	119
206210ce	120	static int tps65912_gpio_remove(struct platform_device *pdev)
668a6cc7 MO	121	{
668a6cc7 MO	122	struct tps65912_gpio_data *tps65912_gpio = platform_get_drvdata(pdev);
668a6cc7	123
9f5132ae	124	gpiochip_remove(&tps65912_gpio->gpio_chip);
9f5132ae	125	return 0;
668a6cc7 MO	126	}
	127
	128	static struct platform_driver tps65912_gpio_driver = {
	129	.driver = {
	130	.name = "tps65912-gpio",
668a6cc7 MO	131	},
668a6cc7 MO	132	.probe = tps65912_gpio_probe,
8283c4ff	133	.remove = tps65912_gpio_remove,
668a6cc7 MO	134	};
	135
	136	static int __init tps65912_gpio_init(void)
	137	{
	138	return platform_driver_register(&tps65912_gpio_driver);
	139	}
	140	subsys_initcall(tps65912_gpio_init);
	141
	142	static void __exit tps65912_gpio_exit(void)
	143	{
	144	platform_driver_unregister(&tps65912_gpio_driver);
	145	}
	146	module_exit(tps65912_gpio_exit);
	147
	148	MODULE_AUTHOR("Margarita Olaya Cabrera <magi@slimlogic.co.uk>");
	149	MODULE_DESCRIPTION("GPIO interface for TPS65912 PMICs");
	150	MODULE_LICENSE("GPL v2");
	151	MODULE_ALIAS("platform:tps65912-gpio");