gpio: tps65912: Add GPIO driver for the TPS65912 PMIC

This patch adds support for the TPS65912 PMIC GPIOs.

TPS65912 has five configurable GPIOs that can be used for several
purposes.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Andrew F. Davis 2016-01-25 09:43:47 -06:00 committed by Lee Jones
parent 33f9d8c0b4
commit ca801a22f4
3 changed files with 165 additions and 0 deletions

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@ -858,6 +858,12 @@ config GPIO_TPS65910
Select this option to enable GPIO driver for the TPS65910
chip family.
config GPIO_TPS65912
tristate "TI TPS65912 GPIO"
depends on MFD_TPS65912
help
This driver supports TPS65912 gpio chip
config GPIO_TWL4030
tristate "TWL4030, TWL5030, and TPS659x0 GPIOs"
depends on TWL4030_CORE

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@ -97,6 +97,7 @@ obj-$(CONFIG_GPIO_TIMBERDALE) += gpio-timberdale.o
obj-$(CONFIG_GPIO_PALMAS) += gpio-palmas.o
obj-$(CONFIG_GPIO_TPS6586X) += gpio-tps6586x.o
obj-$(CONFIG_GPIO_TPS65910) += gpio-tps65910.o
obj-$(CONFIG_GPIO_TPS65912) += gpio-tps65912.o
obj-$(CONFIG_GPIO_TS5500) += gpio-ts5500.o
obj-$(CONFIG_GPIO_TWL4030) += gpio-twl4030.o
obj-$(CONFIG_GPIO_TWL6040) += gpio-twl6040.o

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@ -0,0 +1,158 @@
/*
* GPIO driver for TI TPS65912x PMICs
*
* Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
* Andrew F. Davis <afd@ti.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether expressed or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License version 2 for more details.
*
* Based on the Arizona GPIO driver and the previous TPS65912 driver by
* Margarita Olaya Cabrera <magi@slimlogic.co.uk>
*/
#include <linux/gpio.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/mfd/tps65912.h>
struct tps65912_gpio {
struct gpio_chip gpio_chip;
struct tps65912 *tps;
};
static int tps65912_gpio_get_direction(struct gpio_chip *gc,
unsigned offset)
{
struct tps65912_gpio *gpio = gpiochip_get_data(gc);
int ret, val;
ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val);
if (ret)
return ret;
if (val & GPIO_CFG_MASK)
return GPIOF_DIR_OUT;
else
return GPIOF_DIR_IN;
}
static int tps65912_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
{
struct tps65912_gpio *gpio = gpiochip_get_data(gc);
return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
GPIO_CFG_MASK, 0);
}
static int tps65912_gpio_direction_output(struct gpio_chip *gc,
unsigned offset, int value)
{
struct tps65912_gpio *gpio = gpiochip_get_data(gc);
/* Set the initial value */
regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
GPIO_SET_MASK, value ? GPIO_SET_MASK : 0);
return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
GPIO_CFG_MASK, GPIO_CFG_MASK);
}
static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)
{
struct tps65912_gpio *gpio = gpiochip_get_data(gc);
int ret, val;
ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val);
if (ret)
return ret;
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 *gpio = gpiochip_get_data(gc);
regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
GPIO_SET_MASK, value ? GPIO_SET_MASK : 0);
}
static struct gpio_chip template_chip = {
.label = "tps65912-gpio",
.owner = THIS_MODULE,
.get_direction = tps65912_gpio_get_direction,
.direction_input = tps65912_gpio_direction_input,
.direction_output = tps65912_gpio_direction_output,
.get = tps65912_gpio_get,
.set = tps65912_gpio_set,
.base = -1,
.ngpio = 5,
.can_sleep = true,
};
static int tps65912_gpio_probe(struct platform_device *pdev)
{
struct tps65912 *tps = dev_get_drvdata(pdev->dev.parent);
struct tps65912_gpio *gpio;
int ret;
gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
if (!gpio)
return -ENOMEM;
gpio->tps = dev_get_drvdata(pdev->dev.parent);
gpio->gpio_chip = template_chip;
gpio->gpio_chip.parent = tps->dev;
ret = gpiochip_add_data(&gpio->gpio_chip, gpio);
if (ret < 0) {
dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
return ret;
}
platform_set_drvdata(pdev, gpio);
return 0;
}
static int tps65912_gpio_remove(struct platform_device *pdev)
{
struct tps65912_gpio *gpio = platform_get_drvdata(pdev);
gpiochip_remove(&gpio->gpio_chip);
return 0;
}
static const struct platform_device_id tps65912_gpio_id_table[] = {
{ "tps65912-gpio", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, tps65912_gpio_id_table);
static struct platform_driver tps65912_gpio_driver = {
.driver = {
.name = "tps65912-gpio",
},
.probe = tps65912_gpio_probe,
.remove = tps65912_gpio_remove,
.id_table = tps65912_gpio_id_table,
};
module_platform_driver(tps65912_gpio_driver);
MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
MODULE_DESCRIPTION("TPS65912 GPIO driver");
MODULE_LICENSE("GPL v2");