diff options
author | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-24 21:22:33 +0100 |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-24 21:22:33 +0100 |
commit | baea7b946f00a291b166ccae7fcfed6c01530cc6 (patch) | |
tree | 4aa275fbdbec9c7b9b4629e8bee2bbecd3c6a6af /drivers/gpio/ucb1400_gpio.c | |
parent | ae19ffbadc1b2100285a5b5b3d0a4e0a11390904 (diff) | |
parent | 94e0fb086fc5663c38bbc0fe86d698be8314f82f (diff) |
Merge branch 'origin' into for-linus
Conflicts:
MAINTAINERS
Diffstat (limited to 'drivers/gpio/ucb1400_gpio.c')
-rw-r--r-- | drivers/gpio/ucb1400_gpio.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/drivers/gpio/ucb1400_gpio.c b/drivers/gpio/ucb1400_gpio.c new file mode 100644 index 00000000000..50e6bd1392c --- /dev/null +++ b/drivers/gpio/ucb1400_gpio.c @@ -0,0 +1,125 @@ +/* + * 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"); |