2f97c20e5f
The gpio_chip operations receive a pointer the gpio_chip struct which is contained in the driver's private struct, yet the container_of call in those functions point to the mfd struct defined in include/linux/mfd/tps65912.h. Cc: Stable <stable@vger.kernel.org> Signed-off-by: Nicolas Saenz Julienne <nicolassaenzj@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
154 lines
4.0 KiB
C
154 lines
4.0 KiB
C
/*
|
|
* 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;
|
|
};
|
|
|
|
#define to_tgd(gc) container_of(gc, struct tps65912_gpio_data, gpio_chip)
|
|
|
|
static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)
|
|
{
|
|
struct tps65912_gpio_data *tps65912_gpio = to_tgd(gc);
|
|
struct tps65912 *tps65912 = tps65912_gpio->tps65912;
|
|
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_gpio_data *tps65912_gpio = to_tgd(gc);
|
|
struct tps65912 *tps65912 = tps65912_gpio->tps65912;
|
|
|
|
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_gpio_data *tps65912_gpio = to_tgd(gc);
|
|
struct tps65912 *tps65912 = tps65912_gpio->tps65912;
|
|
|
|
/* 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_gpio_data *tps65912_gpio = to_tgd(gc);
|
|
struct tps65912 *tps65912 = tps65912_gpio->tps65912;
|
|
|
|
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 = true,
|
|
.ngpio = 5,
|
|
.base = -1,
|
|
};
|
|
|
|
static int tps65912_gpio_probe(struct platform_device *pdev)
|
|
{
|
|
struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
|
|
struct tps65912_board *pdata = dev_get_platdata(tps65912->dev);
|
|
struct tps65912_gpio_data *tps65912_gpio;
|
|
int ret;
|
|
|
|
tps65912_gpio = devm_kzalloc(&pdev->dev, 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);
|
|
return ret;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, tps65912_gpio);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int tps65912_gpio_remove(struct platform_device *pdev)
|
|
{
|
|
struct tps65912_gpio_data *tps65912_gpio = platform_get_drvdata(pdev);
|
|
|
|
gpiochip_remove(&tps65912_gpio->gpio_chip);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver tps65912_gpio_driver = {
|
|
.driver = {
|
|
.name = "tps65912-gpio",
|
|
},
|
|
.probe = tps65912_gpio_probe,
|
|
.remove = 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");
|