target/linux/au1000/files/drivers/leds/leds-mtx1.c

   1 /*
   2  * LED driver for MTX-1 boards
   3  *
   4  * Copyright 2007 Florian Fainelli <florian@openwrt.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/leds.h>
  16 #include <linux/err.h>
  17 #include <asm/gpio.h>
  18
  19 static struct platform_device *pdev;
  20
  21 static void mtx1_led_set(struct led_classdev *led_cdev, enum led_brightness brightness)
  22 {
  23         if (!strcmp("mtx1:green", led_cdev->name))
  24                 gpio_set_value(211, brightness ? 1 : 0);
  25         else
  26                 gpio_set_value(212, brightness ? 1 : 0);
  27 }
  28
  29 static struct led_classdev mtx1_green_led = {
  30         .name = "mtx1:green",
  31         .brightness_set = mtx1_led_set,
  32 };
  33
  34 static struct led_classdev mtx1_red_led = {
  35         .name = "mtx1:red",
  36         .brightness_set = mtx1_led_set,
  37 };
  38
  39 static int mtx1_leds_probe(struct platform_device *pdev)
  40 {
  41         int ret;
  42
  43         ret = led_classdev_register(&pdev->dev, &mtx1_green_led);
  44         if (ret < 0)
  45                 goto out;
  46
  47         ret = led_classdev_register(&pdev->dev, &mtx1_red_led);
  48         if (ret < 0)
  49                 led_classdev_unregister(&mtx1_green_led);
  50
  51 out:
  52         return ret;
  53 }
  54
  55 static int mtx1_leds_remove(struct platform_device *pdev)
  56 {
  57         led_classdev_unregister(&mtx1_green_led);
  58         led_classdev_unregister(&mtx1_red_led);
  59         return 0;
  60 }
  61
  62 static struct platform_driver mtx1_leds_driver = {
  63         .probe = mtx1_leds_probe,
  64         .remove = mtx1_leds_remove,
  65         .driver = {
  66                 .name = "mtx1-leds",
  67         }
  68 };
  69
  70 static int __init mtx1_leds_init(void)
  71 {
  72         int ret;
  73
  74         ret = platform_driver_register(&mtx1_leds_driver);
  75         if (ret < 0)
  76                 goto out;
  77
  78         pdev = platform_device_register_simple("mtx1-leds", -1, NULL, 0);
  79         if (IS_ERR(pdev)) {
  80                 ret = PTR_ERR(pdev);
  81                 platform_driver_unregister(&mtx1_leds_driver);
  82                 goto out;
  83         }
  84
  85 out:
  86         return ret;
  87
  88 }
  89
  90 static void __exit mtx1_leds_exit(void)
  91 {
  92         platform_device_unregister(pdev);
  93         platform_driver_unregister(&mtx1_leds_driver);
  94 }
  95
  96 module_init(mtx1_leds_init);
  97 module_exit(mtx1_leds_exit);
  98
  99 MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
 100 MODULE_DESCRIPTION("MTX-1 LED driver");
 101 MODULE_LICENSE("GPL");