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/*
* 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);
unsigned int val;
tps65910_reg_read(tps65910, TPS65910_GPIO0 + offset, &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_reg_set_bits(tps65910, TPS65910_GPIO0 + offset,
GPIO_SET_MASK);
else
tps65910_reg_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, offset, value);
return tps65910_reg_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_reg_clear_bits(tps65910, TPS65910_GPIO0 + offset,
GPIO_CFG_MASK);
}
void tps65910_gpio_init(struct tps65910 *tps65910, int gpio_base)
{
int ret;
struct tps65910_board *board_data;
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 = TPS65910_NUM_GPIO;
break;
case TPS65911:
tps65910->gpio.ngpio = TPS65911_NUM_GPIO;
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;
/* Configure sleep control for gpios */
board_data = dev_get_platdata(tps65910->dev);
if (board_data) {
int i;
for (i = 0; i < tps65910->gpio.ngpio; ++i) {
if (board_data->en_gpio_sleep[i]) {
ret = tps65910_reg_set_bits(tps65910,
TPS65910_GPIO0 + i, GPIO_SLEEP_MASK);
if (ret < 0)
dev_warn(tps65910->dev,
"GPIO Sleep setting failed\n");
}
}
}
ret = gpiochip_add(&tps65910->gpio);
if (ret)
dev_warn(tps65910->dev, "GPIO registration failed: %d\n", ret);
}
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