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/config.h>
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/leds.h>
  19 #include <asm/mach-types.h>
  20 #include <asm/arch/corgi.h>
  21 #include <asm/arch/hardware.h>
  22 #include <asm/arch/pxa-regs.h>
  23 #include <asm/hardware/scoop.h>
  24
  25 static void corgiled_amber_set(struct led_classdev *led_cdev, 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, enum led_brightness value)
  34 {
  35         if (value)
  36                 set_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_LED_GREEN);
  37         else
  38                 reset_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_LED_GREEN);
  39 }
  40
  41 static struct led_classdev corgi_amber_led = {
  42         .name                   = "corgi:amber",
  43         .default_trigger        = "sharpsl-charge",
  44         .brightness_set         = corgiled_amber_set,
  45 };
  46
  47 static struct led_classdev corgi_green_led = {
  48         .name                   = "corgi:green",
  49         .default_trigger        = "nand-disk",
  50         .brightness_set         = corgiled_green_set,
  51 };
  52
  53 #ifdef CONFIG_PM
  54 static int corgiled_suspend(struct platform_device *dev, pm_message_t state)
  55 {
  56 #ifdef CONFIG_LEDS_TRIGGERS
  57         if (corgi_amber_led.trigger && strcmp(corgi_amber_led.trigger->name, "sharpsl-charge"))
  58 #endif
  59                 led_classdev_suspend(&corgi_amber_led);
  60         led_classdev_suspend(&corgi_green_led);
  61         return 0;
  62 }
  63
  64 static int corgiled_resume(struct platform_device *dev)
  65 {
  66         led_classdev_resume(&corgi_amber_led);
  67         led_classdev_resume(&corgi_green_led);
  68         return 0;
  69 }
  70 #endif
  71
  72 static int corgiled_probe(struct platform_device *pdev)
  73 {
  74         int ret;
  75
  76         ret = led_classdev_register(&pdev->dev, &corgi_amber_led);
  77         if (ret < 0)
  78                 return ret;
  79
  80         ret = led_classdev_register(&pdev->dev, &corgi_green_led);
  81         if (ret < 0)
  82                 led_classdev_unregister(&corgi_amber_led);
  83
  84         return ret;
  85 }
  86
  87 static int corgiled_remove(struct platform_device *pdev)
  88 {
  89         led_classdev_unregister(&corgi_amber_led);
  90         led_classdev_unregister(&corgi_green_led);
  91         return 0;
  92 }
  93
  94 static struct platform_driver corgiled_driver = {
  95         .probe          = corgiled_probe,
  96         .remove         = corgiled_remove,
  97 #ifdef CONFIG_PM
  98         .suspend        = corgiled_suspend,
  99         .resume         = corgiled_resume,
 100 #endif
 101         .driver         = {
 102                 .name           = "corgi-led",
 103         },
 104 };
 105
 106 static int __init corgiled_init(void)
 107 {
 108         return platform_driver_register(&corgiled_driver);
 109 }
 110
 111 static void __exit corgiled_exit(void)
 112 {
 113         platform_driver_unregister(&corgiled_driver);
 114 }
 115
 116 module_init(corgiled_init);
 117 module_exit(corgiled_exit);
 118
 119 MODULE_AUTHOR("Richard Purdie <rpurdie@openedhand.com>");
 120 MODULE_DESCRIPTION("Corgi LED driver");
 121 MODULE_LICENSE("GPL");