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Linux/drivers/leds/leds-hp6xx.c

  1 /*
  2  * LED Triggers Core
  3  * For the HP Jornada 620/660/680/690 handhelds
  4  *
  5  * Copyright 2008 Kristoffer Ericson <kristoffer.ericson@gmail.com>
  6  *     this driver is based on leds-spitz.c by Richard Purdie.
  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 #include <linux/module.h>
 14 #include <linux/kernel.h>
 15 #include <linux/platform_device.h>
 16 #include <linux/leds.h>
 17 #include <asm/hd64461.h>
 18 #include <mach/hp6xx.h>
 19 
 20 static void hp6xxled_green_set(struct led_classdev *led_cdev,
 21                                enum led_brightness value)
 22 {
 23         u8 v8;
 24 
 25         v8 = inb(PKDR);
 26         if (value)
 27                 outb(v8 & (~PKDR_LED_GREEN), PKDR);
 28         else
 29                 outb(v8 | PKDR_LED_GREEN, PKDR);
 30 }
 31 
 32 static void hp6xxled_red_set(struct led_classdev *led_cdev,
 33                              enum led_brightness value)
 34 {
 35         u16 v16;
 36 
 37         v16 = inw(HD64461_GPBDR);
 38         if (value)
 39                 outw(v16 & (~HD64461_GPBDR_LED_RED), HD64461_GPBDR);
 40         else
 41                 outw(v16 | HD64461_GPBDR_LED_RED, HD64461_GPBDR);
 42 }
 43 
 44 static struct led_classdev hp6xx_red_led = {
 45         .name                   = "hp6xx:red",
 46         .default_trigger        = "hp6xx-charge",
 47         .brightness_set         = hp6xxled_red_set,
 48         .flags                  = LED_CORE_SUSPENDRESUME,
 49 };
 50 
 51 static struct led_classdev hp6xx_green_led = {
 52         .name                   = "hp6xx:green",
 53         .default_trigger        = "ide-disk",
 54         .brightness_set         = hp6xxled_green_set,
 55         .flags                  = LED_CORE_SUSPENDRESUME,
 56 };
 57 
 58 static int hp6xxled_probe(struct platform_device *pdev)
 59 {
 60         int ret;
 61 
 62         ret = led_classdev_register(&pdev->dev, &hp6xx_red_led);
 63         if (ret < 0)
 64                 return ret;
 65 
 66         ret = led_classdev_register(&pdev->dev, &hp6xx_green_led);
 67         if (ret < 0)
 68                 led_classdev_unregister(&hp6xx_red_led);
 69 
 70         return ret;
 71 }
 72 
 73 static int hp6xxled_remove(struct platform_device *pdev)
 74 {
 75         led_classdev_unregister(&hp6xx_red_led);
 76         led_classdev_unregister(&hp6xx_green_led);
 77 
 78         return 0;
 79 }
 80 
 81 static struct platform_driver hp6xxled_driver = {
 82         .probe          = hp6xxled_probe,
 83         .remove         = hp6xxled_remove,
 84         .driver         = {
 85                 .name           = "hp6xx-led",
 86                 .owner          = THIS_MODULE,
 87         },
 88 };
 89 
 90 module_platform_driver(hp6xxled_driver);
 91 
 92 MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
 93 MODULE_DESCRIPTION("HP Jornada 6xx LED driver");
 94 MODULE_LICENSE("GPL");
 95 MODULE_ALIAS("platform:hp6xx-led");
 96 

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