[linux-2.6-block.git] / drivers / gpio / gpio-tps65910.c

/*
 * TI TPS6591x GPIO driver
 *
 * Copyright 2010 Texas Instruments Inc.
 *
 * Author: Graeme Gregory <gg@slimlogic.co.uk>
 * Author: Jorge Eduardo Candelaria jedu@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.
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/mfd/tps65910.h>

static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset)
{
	struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
	uint8_t val;

	tps65910->read(tps65910, TPS65910_GPIO0 + offset, 1, &val);

	if (val & GPIO_STS_MASK)
		return 1;

	return 0;
}

static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset,
			      int value)
{
	struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);

	if (value)
		tps65910_set_bits(tps65910, TPS65910_GPIO0 + offset,
						GPIO_SET_MASK);
	else
		tps65910_clear_bits(tps65910, TPS65910_GPIO0 + offset,
						GPIO_SET_MASK);
}

static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset,
				int value)
{
	struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);

	/* Set the initial value */
	tps65910_gpio_set(gc, 0, value);

	return tps65910_set_bits(tps65910, TPS65910_GPIO0 + offset,
						GPIO_CFG_MASK);
}

static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset)
{
	struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);

	return tps65910_clear_bits(tps65910, TPS65910_GPIO0 + offset,
						GPIO_CFG_MASK);
}

void tps65910_gpio_init(struct tps65910 *tps65910, int gpio_base)
{
	int ret;

	if (!gpio_base)
		return;

	tps65910->gpio.owner		= THIS_MODULE;
	tps65910->gpio.label		= tps65910->i2c_client->name;
	tps65910->gpio.dev		= tps65910->dev;
	tps65910->gpio.base		= gpio_base;

	switch(tps65910_chip_id(tps65910)) {
	case TPS65910:
		tps65910->gpio.ngpio	= 6;
		break;
	case TPS65911:
		tps65910->gpio.ngpio	= 9;
		break;
	default:
		return;
	}
	tps65910->gpio.can_sleep	= 1;

	tps65910->gpio.direction_input	= tps65910_gpio_input;
	tps65910->gpio.direction_output	= tps65910_gpio_output;
	tps65910->gpio.set		= tps65910_gpio_set;
	tps65910->gpio.get		= tps65910_gpio_get;

	ret = gpiochip_add(&tps65910->gpio);

	if (ret)
		dev_warn(tps65910->dev, "GPIO registration failed: %d\n", ret);
}
Commit	Line	Data
2537df72	1	/*
c103de24	2	* TI TPS6591x GPIO driver
2537df72 GG	3	*
	4	* Copyright 2010 Texas Instruments Inc.
	5	*
	6	* Author: Graeme Gregory <gg@slimlogic.co.uk>
	7	* Author: Jorge Eduardo Candelaria jedu@slimlogic.co.uk>
	8	*
	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of the GNU General Public License as published by the
	11	* Free Software Foundation; either version 2 of the License, or (at your
	12	* option) any later version.
	13	*
	14	*/
	15
	16	#include <linux/kernel.h>
	17	#include <linux/module.h>
	18	#include <linux/errno.h>
	19	#include <linux/gpio.h>
	20	#include <linux/i2c.h>
	21	#include <linux/mfd/tps65910.h>
	22
	23	static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset)
	24	{
	25	struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
	26	uint8_t val;
	27
11ad14f8	28	tps65910->read(tps65910, TPS65910_GPIO0 + offset, 1, &val);
2537df72	29
11ad14f8	30	if (val & GPIO_STS_MASK)
2537df72 GG	31	return 1;
	32
	33	return 0;
	34	}
	35
	36	static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset,
	37	int value)
	38	{
	39	struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
	40
	41	if (value)
11ad14f8 JEC	42	tps65910_set_bits(tps65910, TPS65910_GPIO0 + offset,
11ad14f8 JEC	43	GPIO_SET_MASK);
2537df72	44	else
11ad14f8 JEC	45	tps65910_clear_bits(tps65910, TPS65910_GPIO0 + offset,
11ad14f8 JEC	46	GPIO_SET_MASK);
2537df72 GG	47	}
	48
	49	static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset,
	50	int value)
	51	{
	52	struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
	53
	54	/* Set the initial value */
	55	tps65910_gpio_set(gc, 0, value);
	56
11ad14f8 JEC	57	return tps65910_set_bits(tps65910, TPS65910_GPIO0 + offset,
11ad14f8 JEC	58	GPIO_CFG_MASK);
2537df72 GG	59	}
	60
	61	static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset)
	62	{
	63	struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
	64
11ad14f8 JEC	65	return tps65910_clear_bits(tps65910, TPS65910_GPIO0 + offset,
11ad14f8 JEC	66	GPIO_CFG_MASK);
2537df72 GG	67	}
	68
	69	void tps65910_gpio_init(struct tps65910 *tps65910, int gpio_base)
	70	{
	71	int ret;
	72
	73	if (!gpio_base)
	74	return;
	75
	76	tps65910->gpio.owner = THIS_MODULE;
	77	tps65910->gpio.label = tps65910->i2c_client->name;
	78	tps65910->gpio.dev = tps65910->dev;
	79	tps65910->gpio.base = gpio_base;
11ad14f8 JEC	80
	81	switch(tps65910_chip_id(tps65910)) {
	82	case TPS65910:
	83	tps65910->gpio.ngpio = 6;
58956ba2	84	break;
11ad14f8 JEC	85	case TPS65911:
11ad14f8 JEC	86	tps65910->gpio.ngpio = 9;
58956ba2	87	break;
11ad14f8 JEC	88	default:
	89	return;
	90	}
2537df72 GG	91	tps65910->gpio.can_sleep = 1;
	92
	93	tps65910->gpio.direction_input = tps65910_gpio_input;
	94	tps65910->gpio.direction_output = tps65910_gpio_output;
	95	tps65910->gpio.set = tps65910_gpio_set;
	96	tps65910->gpio.get = tps65910_gpio_get;
	97
	98	ret = gpiochip_add(&tps65910->gpio);
	99
	100	if (ret)
	101	dev_warn(tps65910->dev, "GPIO registration failed: %d\n", ret);
	102	}