ec976d6eb0
Move all the gpio functions out of <mach/hardware.h> as this file is for defining the generic IO base addresses for the kernel IO calls. Make a new header <mach/gpio-fns.h> to take this and include it via the chain from <linux/gpio.h> which is what most of these files should be using (and will be changed as soon as possible). Note, this does make minor changes to some drivers but should not mess up any pending merges. CC: Richard Purdie <rpurdie@rpsys.net> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> CC: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
138 lines
3.3 KiB
C
138 lines
3.3 KiB
C
/* drivers/leds/leds-s3c24xx.c
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*
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* (c) 2006 Simtec Electronics
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* http://armlinux.simtec.co.uk/
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* Ben Dooks <ben@simtec.co.uk>
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*
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* S3C24XX - LEDs GPIO driver
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/leds.h>
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#include <linux/gpio.h>
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#include <mach/hardware.h>
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#include <mach/regs-gpio.h>
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#include <mach/leds-gpio.h>
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/* our context */
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struct s3c24xx_gpio_led {
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struct led_classdev cdev;
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struct s3c24xx_led_platdata *pdata;
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};
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static inline struct s3c24xx_gpio_led *pdev_to_gpio(struct platform_device *dev)
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{
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return platform_get_drvdata(dev);
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}
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static inline struct s3c24xx_gpio_led *to_gpio(struct led_classdev *led_cdev)
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{
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return container_of(led_cdev, struct s3c24xx_gpio_led, cdev);
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}
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static void s3c24xx_led_set(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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struct s3c24xx_gpio_led *led = to_gpio(led_cdev);
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struct s3c24xx_led_platdata *pd = led->pdata;
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/* there will be a short delay between setting the output and
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* going from output to input when using tristate. */
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s3c2410_gpio_setpin(pd->gpio, (value ? 1 : 0) ^
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(pd->flags & S3C24XX_LEDF_ACTLOW));
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if (pd->flags & S3C24XX_LEDF_TRISTATE)
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s3c2410_gpio_cfgpin(pd->gpio,
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value ? S3C2410_GPIO_OUTPUT : S3C2410_GPIO_INPUT);
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}
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static int s3c24xx_led_remove(struct platform_device *dev)
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{
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struct s3c24xx_gpio_led *led = pdev_to_gpio(dev);
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led_classdev_unregister(&led->cdev);
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kfree(led);
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return 0;
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}
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static int s3c24xx_led_probe(struct platform_device *dev)
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{
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struct s3c24xx_led_platdata *pdata = dev->dev.platform_data;
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struct s3c24xx_gpio_led *led;
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int ret;
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led = kzalloc(sizeof(struct s3c24xx_gpio_led), GFP_KERNEL);
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if (led == NULL) {
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dev_err(&dev->dev, "No memory for device\n");
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return -ENOMEM;
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}
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platform_set_drvdata(dev, led);
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led->cdev.brightness_set = s3c24xx_led_set;
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led->cdev.default_trigger = pdata->def_trigger;
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led->cdev.name = pdata->name;
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led->cdev.flags |= LED_CORE_SUSPENDRESUME;
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led->pdata = pdata;
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/* no point in having a pull-up if we are always driving */
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if (pdata->flags & S3C24XX_LEDF_TRISTATE) {
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s3c2410_gpio_setpin(pdata->gpio, 0);
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s3c2410_gpio_cfgpin(pdata->gpio, S3C2410_GPIO_INPUT);
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} else {
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s3c2410_gpio_pullup(pdata->gpio, 0);
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s3c2410_gpio_setpin(pdata->gpio, 0);
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s3c2410_gpio_cfgpin(pdata->gpio, S3C2410_GPIO_OUTPUT);
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}
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/* register our new led device */
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ret = led_classdev_register(&dev->dev, &led->cdev);
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if (ret < 0) {
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dev_err(&dev->dev, "led_classdev_register failed\n");
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kfree(led);
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return ret;
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}
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return 0;
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}
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static struct platform_driver s3c24xx_led_driver = {
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.probe = s3c24xx_led_probe,
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.remove = s3c24xx_led_remove,
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.driver = {
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.name = "s3c24xx_led",
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.owner = THIS_MODULE,
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},
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};
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static int __init s3c24xx_led_init(void)
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{
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return platform_driver_register(&s3c24xx_led_driver);
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}
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static void __exit s3c24xx_led_exit(void)
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{
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platform_driver_unregister(&s3c24xx_led_driver);
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}
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module_init(s3c24xx_led_init);
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module_exit(s3c24xx_led_exit);
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MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
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MODULE_DESCRIPTION("S3C24XX LED driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:s3c24xx_led");
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