drivers/leds/leds-corgi.c

   1 /*
   2  * LED Triggers Core
   3  *
   4  * Copyright 2005-2006 Openedhand Ltd.
   5  *
   6  * Author: Richard Purdie <rpurdie@openedhand.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/leds.h>
  18 #include <asm/mach-types.h>
  19 #include <asm/arch/corgi.h>
  20 #include <asm/arch/hardware.h>
  21 #include <asm/arch/pxa-regs.h>
  22 #include <asm/hardware/scoop.h>
  23
  24 static void corgiled_amber_set(struct led_classdev *led_cdev,
  25                                enum led_brightness value)
  26 {
  27         if (value)
  28                 GPSR0 = GPIO_bit(CORGI_GPIO_LED_ORANGE);
  29         else
  30                 GPCR0 = GPIO_bit(CORGI_GPIO_LED_ORANGE);
  31 }
  32
  33 static void corgiled_green_set(struct led_classdev *led_cdev,
  34                                enum led_brightness value)
  35 {
  36         if (value)
  37                 set_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_LED_GREEN);
  38         else
  39                 reset_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_LED_GREEN);
  40 }
  41
  42 static struct led_classdev corgi_amber_led = {
  43         .name                   = "corgi:amber:charge",
  44         .default_trigger        = "sharpsl-charge",
  45         .brightness_set         = corgiled_amber_set,
  46 };
  47
  48 static struct led_classdev corgi_green_led = {
  49         .name                   = "corgi:green:mail",
  50         .default_trigger        = "nand-disk",
  51         .brightness_set         = corgiled_green_set,
  52 };
  53
  54 #ifdef CONFIG_PM
  55 static int corgiled_suspend(struct platform_device *dev, pm_message_t state)
  56 {
  57 #ifdef CONFIG_LEDS_TRIGGERS
  58         if (corgi_amber_led.trigger &&
  59             strcmp(corgi_amber_led.trigger->name, "sharpsl-charge"))
  60 #endif
  61                 led_classdev_suspend(&corgi_amber_led);
  62         led_classdev_suspend(&corgi_green_led);
  63         return 0;
  64 }
  65
  66 static int corgiled_resume(struct platform_device *dev)
  67 {
  68         led_classdev_resume(&corgi_amber_led);
  69         led_classdev_resume(&corgi_green_led);
  70         return 0;
  71 }
  72 #endif
  73
  74 static int corgiled_probe(struct platform_device *pdev)
  75 {
  76         int ret;
  77
  78         ret = led_classdev_register(&pdev->dev, &corgi_amber_led);
  79         if (ret < 0)
  80                 return ret;
  81
  82         ret = led_classdev_register(&pdev->dev, &corgi_green_led);
  83         if (ret < 0)
  84                 led_classdev_unregister(&corgi_amber_led);
  85
  86         return ret;
  87 }
  88
  89 static int corgiled_remove(struct platform_device *pdev)
  90 {
  91         led_classdev_unregister(&corgi_amber_led);
  92         led_classdev_unregister(&corgi_green_led);
  93         return 0;
  94 }
  95
  96 static struct platform_driver corgiled_driver = {
  97         .probe          = corgiled_probe,
  98         .remove         = corgiled_remove,
  99 #ifdef CONFIG_PM
 100         .suspend        = corgiled_suspend,
 101         .resume         = corgiled_resume,
 102 #endif
 103         .driver         = {
 104                 .name           = "corgi-led",
 105                 .owner          = THIS_MODULE,
 106         },
 107 };
 108
 109 static int __init corgiled_init(void)
 110 {
 111         return platform_driver_register(&corgiled_driver);
 112 }
 113
 114 static void __exit corgiled_exit(void)
 115 {
 116         platform_driver_unregister(&corgiled_driver);
 117 }
 118
 119 module_init(corgiled_init);
 120 module_exit(corgiled_exit);
 121
 122 MODULE_AUTHOR("Richard Purdie <rpurdie@openedhand.com>");
 123 MODULE_DESCRIPTION("Corgi LED driver");
 124 MODULE_LICENSE("GPL");
 125 MODULE_ALIAS("platform:corgi-led");