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gpio: tps65086: Add GPO driver for the TPS65086 PMIC

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Add support for the TPS65086 PMIC GPOs.

TPS65086 has four configurable GPOs that can be used for several
purposes. These are output only.

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 2016-02-06 10:12:10 -06:00 committed by Lee Jones
parent e1d9a10918
commit 99f0fd540f
3 changed files with 146 additions and 0 deletions
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6
drivers/gpio/Kconfig
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@ -844,6 +844,12 @@ config GPIO_TIMBERDALE
---help---
Add support for the GPIO IP in the timberdale FPGA.
config GPIO_TPS65086
tristate "TI TPS65086 GPO"
depends on MFD_TPS65086
help
This driver supports the GPO on TI TPS65086x PMICs.
config GPIO_TPS6586X
bool "TPS6586X GPIO"
depends on MFD_TPS6586X

1
drivers/gpio/Makefile
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@ -95,6 +95,7 @@ obj-$(CONFIG_GPIO_TC3589X) += gpio-tc3589x.o
obj-$(CONFIG_ARCH_TEGRA) += gpio-tegra.o
obj-$(CONFIG_GPIO_TIMBERDALE) += gpio-timberdale.o
obj-$(CONFIG_GPIO_PALMAS) += gpio-palmas.o
obj-$(CONFIG_GPIO_TPS65086) += gpio-tps65086.o
obj-$(CONFIG_GPIO_TPS6586X) += gpio-tps6586x.o
obj-$(CONFIG_GPIO_TPS65910) += gpio-tps65910.o
obj-$(CONFIG_GPIO_TPS65912) += gpio-tps65912.o

139
drivers/gpio/gpio-tps65086.c Normal file
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@ -0,0 +1,139 @@
/*
* 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 TPS65912 driver
*/
#include <linux/gpio.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/mfd/tps65086.h>
struct tps65086_gpio {
struct gpio_chip chip;
struct tps65086 *tps;
};
static int tps65086_gpio_get_direction(struct gpio_chip *chip,
unsigned offset)
{
/* This device is output only */
return 0;
}
static int tps65086_gpio_direction_input(struct gpio_chip *chip,
unsigned offset)
{
/* This device is output only */
return -EINVAL;
}
static int tps65086_gpio_direction_output(struct gpio_chip *chip,
unsigned offset, int value)
{
struct tps65086_gpio *gpio = gpiochip_get_data(chip);
/* Set the initial value */
regmap_update_bits(gpio->tps->regmap, TPS65086_GPOCTRL,
BIT(4 + offset), value ? BIT(4 + offset) : 0);
return 0;
}
static int tps65086_gpio_get(struct gpio_chip *chip, unsigned offset)
{
struct tps65086_gpio *gpio = gpiochip_get_data(chip);
int ret, val;
ret = regmap_read(gpio->tps->regmap, TPS65086_GPOCTRL, &val);
if (ret < 0)
return ret;
return val & BIT(4 + offset);
}
static void tps65086_gpio_set(struct gpio_chip *chip, unsigned offset,
int value)
{
struct tps65086_gpio *gpio = gpiochip_get_data(chip);
regmap_update_bits(gpio->tps->regmap, TPS65086_GPOCTRL,
BIT(4 + offset), value ? BIT(4 + offset) : 0);
}
static struct gpio_chip template_chip = {
.label = "tps65086-gpio",
.owner = THIS_MODULE,
.get_direction = tps65086_gpio_get_direction,
.direction_input = tps65086_gpio_direction_input,
.direction_output = tps65086_gpio_direction_output,
.get = tps65086_gpio_get,
.set = tps65086_gpio_set,
.base = -1,
.ngpio = 4,
.can_sleep = true,
};
static int tps65086_gpio_probe(struct platform_device *pdev)
{
struct tps65086_gpio *gpio;
int ret;
gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
if (!gpio)
return -ENOMEM;
platform_set_drvdata(pdev, gpio);
gpio->tps = dev_get_drvdata(pdev->dev.parent);
gpio->chip = template_chip;
gpio->chip.parent = gpio->tps->dev;
ret = gpiochip_add_data(&gpio->chip, gpio);
if (ret < 0) {
dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
return ret;
}
return 0;
}
static int tps65086_gpio_remove(struct platform_device *pdev)
{
struct tps65086_gpio *gpio = platform_get_drvdata(pdev);
gpiochip_remove(&gpio->chip);
return 0;
}
static const struct platform_device_id tps65086_gpio_id_table[] = {
{ "tps65086-gpio", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, tps65086_gpio_id_table);
static struct platform_driver tps65086_gpio_driver = {
.driver = {
.name = "tps65086-gpio",
},
.probe = tps65086_gpio_probe,
.remove = tps65086_gpio_remove,
.id_table = tps65086_gpio_id_table,
};
module_platform_driver(tps65086_gpio_driver);
MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
MODULE_DESCRIPTION("TPS65086 GPIO driver");
MODULE_LICENSE("GPL v2");