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TPS65910: GPIO: Add GPIO driver

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TPS65910 has one configurable GPIO that can be used for several
purposes. Subsequent versions of the TPS chip support more than
one GPIO.

Signed-off-by: Graeme Gregory <gg@slimlogic.co.uk>
Signed-off-by: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Graeme Gregory 2011-05-02 16:19:52 -05:00 committed by Liam Girdwood
parent 27c6750ec5
commit 2537df722d
4 changed files with 101 additions and 1 deletions
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2
drivers/mfd/Makefile
View file

@ -93,4 +93,4 @@ obj-$(CONFIG_MFD_CS5535) += cs5535-mfd.o
obj-$(CONFIG_MFD_OMAP_USB_HOST) += omap-usb-host.o
obj-$(CONFIG_MFD_PM8921_CORE) += pm8921-core.o
obj-$(CONFIG_MFD_PM8XXX_IRQ) += pm8xxx-irq.o
obj-$(CONFIG_MFD_TPS65910) += tps65910.o
obj-$(CONFIG_MFD_TPS65910) += tps65910.o tps65910-gpio.o

91
drivers/mfd/tps65910-gpio.c Normal file
View file

@ -0,0 +1,91 @@
/*
* tps65910-gpio.c -- TI TPS6591x
*
* 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, 1, &val);
if (val & GPIO0_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,
GPIO0_GPIO_SET_MASK);
else
tps65910_clear_bits(tps65910, TPS65910_GPIO0,
GPIO0_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, GPIO0_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,
GPIO0_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;
tps65910->gpio.ngpio = 1;
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);
}

7
drivers/mfd/tps65910.c
View file

@ -135,8 +135,13 @@ static int tps65910_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct tps65910 *tps65910;
struct tps65910_board *pmic_plat_data;
int ret = 0;
pmic_plat_data = dev_get_platdata(&i2c->dev);
if (!pmic_plat_data)
return -EINVAL;
tps65910 = kzalloc(sizeof(struct tps65910), GFP_KERNEL);
if (tps65910 == NULL)
return -ENOMEM;
@ -154,6 +159,8 @@ static int tps65910_i2c_probe(struct i2c_client *i2c,
if (ret < 0)
goto err;
tps65910_gpio_init(tps65910, pmic_plat_data->gpio_base);
return ret;
err:

2
include/linux/mfd/tps65910.h
View file

@ -714,6 +714,7 @@
*/
struct tps65910_board {
int gpio_base;
struct regulator_init_data *tps65910_pmic_init_data;
};
@ -749,5 +750,6 @@ struct tps65910_platform_data {
int tps65910_set_bits(struct tps65910 *tps65910, u8 reg, u8 mask);
int tps65910_clear_bits(struct tps65910 *tps65910, u8 reg, u8 mask);
void tps65910_gpio_init(struct tps65910 *tps65910, int gpio_base);
#endif /* __LINUX_MFD_TPS65910_H */