126 lines
2.8 KiB
C
126 lines
2.8 KiB
C
|
/*
|
||
|
|
* 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>
|
||
|
|
|
||
|
|
struct ucb1400_gpio_data *ucbdata;
|
||
|
|
|
||
|
|
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->dev.platform_data;
|
||
|
|
int err = 0;
|
||
|
|
|
||
|
|
if (!(ucbdata && ucbdata->gpio_offset)) {
|
||
|
|
err = -EINVAL;
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
platform_set_drvdata(dev, ucb);
|
||
|
|
|
||
|
|
ucb->gc.label = "ucb1400_gpio";
|
||
|
|
ucb->gc.base = ucbdata->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 = 1;
|
||
|
|
|
||
|
|
err = gpiochip_add(&ucb->gc);
|
||
|
|
if (err)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
if (ucbdata && ucbdata->gpio_setup)
|
||
|
|
err = ucbdata->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 (ucbdata && ucbdata->gpio_teardown) {
|
||
|
|
err = ucbdata->gpio_teardown(&dev->dev, ucb->gc.ngpio);
|
||
|
|
if (err)
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
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"
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init ucb1400_gpio_init(void)
|
||
|
|
{
|
||
|
|
return platform_driver_register(&ucb1400_gpio_driver);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __exit ucb1400_gpio_exit(void)
|
||
|
|
{
|
||
|
|
platform_driver_unregister(&ucb1400_gpio_driver);
|
||
|
|
}
|
||
|
|
|
||
|
|
void __init ucb1400_gpio_set_data(struct ucb1400_gpio_data *data)
|
||
|
|
{
|
||
|
|
ucbdata = data;
|
||
|
|
}
|
||
|
|
|
||
|
|
module_init(ucb1400_gpio_init);
|
||
|
|
module_exit(ucb1400_gpio_exit);
|
||
|
|
|
||
|
|
MODULE_DESCRIPTION("Philips UCB1400 GPIO driver");
|
||
|
|
MODULE_LICENSE("GPL");
|