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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/init.h>
 16 #include <linux/platform_device.h>
 17 #include <linux/leds.h>
 18 #include <asm/hd64461.h>
 19 #include <mach/hp6xx.h>
 20 
 21 static void hp6xxled_green_set(struct led_classdev *led_cdev,
 22                                enum led_brightness value)
 23 {
 24         u8 v8;
 25 
 26         v8 = inb(PKDR);
 27         if (value)
 28                 outb(v8 & (~PKDR_LED_GREEN), PKDR);
 29         else
 30                 outb(v8 | PKDR_LED_GREEN, PKDR);
 31 }
 32 
 33 static void hp6xxled_red_set(struct led_classdev *led_cdev,
 34                              enum led_brightness value)
 35 {
 36         u16 v16;
 37 
 38         v16 = inw(HD64461_GPBDR);
 39         if (value)
 40                 outw(v16 & (~HD64461_GPBDR_LED_RED), HD64461_GPBDR);
 41         else
 42                 outw(v16 | HD64461_GPBDR_LED_RED, HD64461_GPBDR);
 43 }
 44 
 45 static struct led_classdev hp6xx_red_led = {
 46         .name                   = "hp6xx:red",
 47         .default_trigger        = "hp6xx-charge",
 48         .brightness_set         = hp6xxled_red_set,
 49         .flags                  = LED_CORE_SUSPENDRESUME,
 50 };
 51 
 52 static struct led_classdev hp6xx_green_led = {
 53         .name                   = "hp6xx:green",
 54         .default_trigger        = "ide-disk",
 55         .brightness_set         = hp6xxled_green_set,
 56         .flags                  = LED_CORE_SUSPENDRESUME,
 57 };
 58 
 59 static int hp6xxled_probe(struct platform_device *pdev)
 60 {
 61         int ret;
 62 
 63         ret = led_classdev_register(&pdev->dev, &hp6xx_red_led);
 64         if (ret < 0)
 65                 return ret;
 66 
 67         ret = led_classdev_register(&pdev->dev, &hp6xx_green_led);
 68         if (ret < 0)
 69                 led_classdev_unregister(&hp6xx_red_led);
 70 
 71         return ret;
 72 }
 73 
 74 static int hp6xxled_remove(struct platform_device *pdev)
 75 {
 76         led_classdev_unregister(&hp6xx_red_led);
 77         led_classdev_unregister(&hp6xx_green_led);
 78 
 79         return 0;
 80 }
 81 
 82 static struct platform_driver hp6xxled_driver = {
 83         .probe          = hp6xxled_probe,
 84         .remove         = hp6xxled_remove,
 85         .driver         = {
 86                 .name           = "hp6xx-led",
 87                 .owner          = THIS_MODULE,
 88         },
 89 };
 90 
 91 module_platform_driver(hp6xxled_driver);
 92 
 93 MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
 94 MODULE_DESCRIPTION("HP Jornada 6xx LED driver");
 95 MODULE_LICENSE("GPL");
 96 MODULE_ALIAS("platform:hp6xx-led");
 97 

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