target/linux/ar71xx/files/drivers/leds/leds-wndr3700-usb.c

   1 /*
   2  *  USB LED driver for the NETGEAR WNDR3700
   3  *
   4  *  Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify it
   7  *  under the terms of the GNU General Public License version 2 as published
   8  *  by the Free Software Foundation.
   9  */
  10
  11 #include <linux/leds.h>
  12 #include <linux/module.h>
  13 #include <linux/platform_device.h>
  14
  15 #include <asm/mach-ath79/ar71xx_regs.h>
  16 #include <asm/mach-ath79/ath79.h>
  17
  18 #define DRIVER_NAME     "wndr3700-led-usb"
  19
  20 static void wndr3700_usb_led_set(struct led_classdev *cdev,
  21                                  enum led_brightness brightness)
  22 {
  23         if (brightness)
  24                 ath79_device_reset_clear(AR71XX_RESET_GE1_PHY);
  25         else
  26                 ath79_device_reset_set(AR71XX_RESET_GE1_PHY);
  27 }
  28
  29 static enum led_brightness wndr3700_usb_led_get(struct led_classdev *cdev)
  30 {
  31         return ath79_device_reset_get(AR71XX_RESET_GE1_PHY) ? LED_OFF : LED_FULL;
  32 }
  33
  34 static struct led_classdev wndr3700_usb_led = {
  35         .name = "wndr3700:green:usb",
  36         .brightness_set = wndr3700_usb_led_set,
  37         .brightness_get = wndr3700_usb_led_get,
  38 };
  39
  40 static int __devinit wndr3700_usb_led_probe(struct platform_device *pdev)
  41 {
  42         return led_classdev_register(&pdev->dev, &wndr3700_usb_led);
  43 }
  44
  45 static int __devexit wndr3700_usb_led_remove(struct platform_device *pdev)
  46 {
  47         led_classdev_unregister(&wndr3700_usb_led);
  48         return 0;
  49 }
  50
  51 static struct platform_driver wndr3700_usb_led_driver = {
  52         .probe = wndr3700_usb_led_probe,
  53         .remove = __devexit_p(wndr3700_usb_led_remove),
  54         .driver = {
  55                 .name = DRIVER_NAME,
  56                 .owner = THIS_MODULE,
  57         },
  58 };
  59
  60 static int __init wndr3700_usb_led_init(void)
  61 {
  62         return platform_driver_register(&wndr3700_usb_led_driver);
  63 }
  64
  65 static void __exit wndr3700_usb_led_exit(void)
  66 {
  67         platform_driver_unregister(&wndr3700_usb_led_driver);
  68 }
  69
  70 module_init(wndr3700_usb_led_init);
  71 module_exit(wndr3700_usb_led_exit);
  72
  73 MODULE_DESCRIPTION("USB LED driver for the NETGEAR WNDR3700");
  74 MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
  75 MODULE_LICENSE("GPL v2");
  76 MODULE_ALIAS("platform:" DRIVER_NAME);