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-ar71xx/ar71xx.h>
  16
  17 #define DRIVER_NAME     "wndr3700-led-usb"
  18
  19 static void wndr3700_usb_led_set(struct led_classdev *cdev,
  20                                  enum led_brightness brightness)
  21 {
  22         if (brightness)
  23                 ar71xx_device_start(RESET_MODULE_GE1_PHY);
  24         else
  25                 ar71xx_device_stop(RESET_MODULE_GE1_PHY);
  26 }
  27
  28 static enum led_brightness wndr3700_usb_led_get(struct led_classdev *cdev)
  29 {
  30         return ar71xx_device_stopped(RESET_MODULE_GE1_PHY) ? LED_OFF : LED_FULL;
  31 }
  32
  33 static struct led_classdev wndr3700_usb_led = {
  34         .name = "wndr3700:green:usb",
  35         .brightness_set = wndr3700_usb_led_set,
  36         .brightness_get = wndr3700_usb_led_get,
  37 };
  38
  39 static int __devinit wndr3700_usb_led_probe(struct platform_device *pdev)
  40 {
  41         return led_classdev_register(&pdev->dev, &wndr3700_usb_led);
  42 }
  43
  44 static int __devexit wndr3700_usb_led_remove(struct platform_device *pdev)
  45 {
  46         led_classdev_unregister(&wndr3700_usb_led);
  47         return 0;
  48 }
  49
  50 static struct platform_driver wndr3700_usb_led_driver = {
  51         .probe = wndr3700_usb_led_probe,
  52         .remove = __devexit_p(wndr3700_usb_led_remove),
  53         .driver = {
  54                 .name = DRIVER_NAME,
  55                 .owner = THIS_MODULE,
  56         },
  57 };
  58
  59 static int __init wndr3700_usb_led_init(void)
  60 {
  61         return platform_driver_register(&wndr3700_usb_led_driver);
  62 }
  63
  64 static void __exit wndr3700_usb_led_exit(void)
  65 {
  66         platform_driver_unregister(&wndr3700_usb_led_driver);
  67 }
  68
  69 module_init(wndr3700_usb_led_init);
  70 module_exit(wndr3700_usb_led_exit);
  71
  72 MODULE_DESCRIPTION("USB LED driver for the NETGEAR WNDR3700");
  73 MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
  74 MODULE_LICENSE("GPL v2");
  75 MODULE_ALIAS("platform:" DRIVER_NAME);