gpio-ucb1400.c
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/*
* Philips UCB1400 GPIO driver
*
* Author: Marek Vasut <marek.vasut@gmail.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.
*
*/
#include <linux/module.h>
#include <linux/ucb1400.h>
static int ucb1400_gpio_dir_in(struct gpio_chip *gc, unsigned off)
{
struct ucb1400_gpio *gpio;
gpio = container_of(gc, struct ucb1400_gpio, gc);
ucb1400_gpio_set_direction(gpio->ac97, off, 0);
return 0;
}
static int ucb1400_gpio_dir_out(struct gpio_chip *gc, unsigned off, int val)
{
struct ucb1400_gpio *gpio;
gpio = container_of(gc, struct ucb1400_gpio, gc);
ucb1400_gpio_set_direction(gpio->ac97, off, 1);
ucb1400_gpio_set_value(gpio->ac97, off, val);
return 0;
}
static int ucb1400_gpio_get(struct gpio_chip *gc, unsigned off)
{
struct ucb1400_gpio *gpio;
gpio = container_of(gc, struct ucb1400_gpio, gc);
return ucb1400_gpio_get_value(gpio->ac97, off);
}
static void ucb1400_gpio_set(struct gpio_chip *gc, unsigned off, int val)
{
struct ucb1400_gpio *gpio;
gpio = container_of(gc, struct ucb1400_gpio, gc);
ucb1400_gpio_set_value(gpio->ac97, off, val);
}
static int ucb1400_gpio_probe(struct platform_device *dev)
{
struct ucb1400_gpio *ucb = dev_get_platdata(&dev->dev);
int err = 0;
if (!(ucb && ucb->gpio_offset)) {
err = -EINVAL;
goto err;
}
platform_set_drvdata(dev, ucb);
ucb->gc.label = "ucb1400_gpio";
ucb->gc.base = ucb->gpio_offset;
ucb->gc.ngpio = 10;
ucb->gc.owner = THIS_MODULE;
ucb->gc.direction_input = ucb1400_gpio_dir_in;
ucb->gc.direction_output = ucb1400_gpio_dir_out;
ucb->gc.get = ucb1400_gpio_get;
ucb->gc.set = ucb1400_gpio_set;
ucb->gc.can_sleep = true;
err = gpiochip_add(&ucb->gc);
if (err)
goto err;
if (ucb->gpio_setup)
err = ucb->gpio_setup(&dev->dev, ucb->gc.ngpio);
err:
return err;
}
static int ucb1400_gpio_remove(struct platform_device *dev)
{
int err = 0;
struct ucb1400_gpio *ucb = platform_get_drvdata(dev);
if (ucb && ucb->gpio_teardown) {
err = ucb->gpio_teardown(&dev->dev, ucb->gc.ngpio);
if (err)
return err;
}
gpiochip_remove(&ucb->gc);
return err;
}
static struct platform_driver ucb1400_gpio_driver = {
.probe = ucb1400_gpio_probe,
.remove = ucb1400_gpio_remove,
.driver = {
.name = "ucb1400_gpio"
},
};
module_platform_driver(ucb1400_gpio_driver);
MODULE_DESCRIPTION("Philips UCB1400 GPIO driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:ucb1400_gpio");