Commit 668a6cc7 authored by Margarita Olaya's avatar Margarita Olaya Committed by Samuel Ortiz

tps65912: gpio: add gpio driver

TPS65912 has five GPIOs that can be configured for different
purposes.
Signed-off-by: default avatarMargarita Olaya Cabrera <magi@slimlogic.co.uk>
Acked-by: default avatarGrant Likely <grant.likely@secretlab.ca>
Acked-by: default avatarLiam Girdwood <lrg@ti.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent d49a0f3f
......@@ -280,6 +280,12 @@ config GPIO_TC3589X
This enables support for the GPIOs found on the TC3589X
I/O Expander.
config GPIO_TPS65912
tristate "TI TPS65912 GPIO"
depends on (MFD_TPS65912_I2C || MFD_TPS65912_SPI)
help
This driver supports TPS65912 gpio chip
config GPIO_TWL4030
tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
depends on TWL4030_CORE
......
......@@ -48,6 +48,7 @@ obj-$(CONFIG_GPIO_TC3589X) += gpio-tc3589x.o
obj-$(CONFIG_ARCH_TEGRA) += gpio-tegra.o
obj-$(CONFIG_GPIO_TIMBERDALE) += gpio-timberdale.o
obj-$(CONFIG_GPIO_TPS65910) += gpio-tps65910.o
obj-$(CONFIG_GPIO_TPS65912) += gpio-tps65912.o
obj-$(CONFIG_GPIO_TWL4030) += gpio-twl4030.o
obj-$(CONFIG_MACH_U300) += gpio-u300.o
obj-$(CONFIG_GPIO_UCB1400) += gpio-ucb1400.o
......
/*
* 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 *tps65912 = container_of(gc, struct tps65912, gpio);
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 *tps65912 = container_of(gc, struct tps65912, gpio);
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 *tps65912 = container_of(gc, struct tps65912, gpio);
/* 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 *tps65912 = container_of(gc, struct tps65912, gpio);
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 = 1,
.ngpio = 5,
.base = -1,
};
static int __devinit tps65912_gpio_probe(struct platform_device *pdev)
{
struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
struct tps65912_board *pdata = tps65912->dev->platform_data;
struct tps65912_gpio_data *tps65912_gpio;
int ret;
tps65912_gpio = kzalloc(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);
goto err;
}
platform_set_drvdata(pdev, tps65912_gpio);
return ret;
err:
kfree(tps65912_gpio);
return ret;
}
static int __devexit tps65912_gpio_remove(struct platform_device *pdev)
{
struct tps65912_gpio_data *tps65912_gpio = platform_get_drvdata(pdev);
int ret;
ret = gpiochip_remove(&tps65912_gpio->gpio_chip);
if (ret == 0)
kfree(tps65912_gpio);
return ret;
}
static struct platform_driver tps65912_gpio_driver = {
.driver = {
.name = "tps65912-gpio",
.owner = THIS_MODULE,
},
.probe = tps65912_gpio_probe,
.remove = __devexit_p(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");
......@@ -275,6 +275,7 @@ struct tps65912_board {
int is_dcdc4_avs;
int irq;
int irq_base;
int gpio_base;
struct regulator_init_data *tps65912_pmic_init_data;
};
......
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