4d404fd5c5
Break the lines which were more than 80 characters into more lines; replace SPACEs with TABs; correct ident at switch-case; change character encoding from ISO-8859-2 to UTF-8. The order of the functions in led-triggers.c changed in order the similar functions can still be together under titles "Used by LED Class", "LED Trigger Interface" and "Simple LED Tigger Interface" as was grouped before when exported with EXPORT_SYMBOL. Signed-off-by: Márton Németh <nm127@freemail.hu> Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
163 lines
3.8 KiB
C
163 lines
3.8 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 <asm/hardware.h>
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#include <asm/arch/regs-gpio.h>
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#include <asm/arch/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->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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goto exit_err1;
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}
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return 0;
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exit_err1:
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kfree(led);
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return ret;
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}
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#ifdef CONFIG_PM
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static int s3c24xx_led_suspend(struct platform_device *dev, pm_message_t state)
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{
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struct s3c24xx_gpio_led *led = pdev_to_gpio(dev);
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led_classdev_suspend(&led->cdev);
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return 0;
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}
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static int s3c24xx_led_resume(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_resume(&led->cdev);
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return 0;
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}
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#else
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#define s3c24xx_led_suspend NULL
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#define s3c24xx_led_resume NULL
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#endif
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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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.suspend = s3c24xx_led_suspend,
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.resume = s3c24xx_led_resume,
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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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