drivers/leds/leds-hp6xx.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * LED Triggers Core
   4  * For the HP Jornada 620/660/680/690 handhelds
   5  *
   6  * Copyright 2008 Kristoffer Ericson <kristoffer.ericson@gmail.com>
   7  *     this driver is based on leds-spitz.c by Richard Purdie.
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/kernel.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/leds.h>
  14 #include <asm/hd64461.h>
  15 #include <mach/hp6xx.h>
  16
  17 static void hp6xxled_green_set(struct led_classdev *led_cdev,
  18                                enum led_brightness value)
  19 {
  20         u8 v8;
  21
  22         v8 = inb(PKDR);
  23         if (value)
  24                 outb(v8 & (~PKDR_LED_GREEN), PKDR);
  25         else
  26                 outb(v8 | PKDR_LED_GREEN, PKDR);
  27 }
  28
  29 static void hp6xxled_red_set(struct led_classdev *led_cdev,
  30                              enum led_brightness value)
  31 {
  32         u16 v16;
  33
  34         v16 = inw(HD64461_GPBDR);
  35         if (value)
  36                 outw(v16 & (~HD64461_GPBDR_LED_RED), HD64461_GPBDR);
  37         else
  38                 outw(v16 | HD64461_GPBDR_LED_RED, HD64461_GPBDR);
  39 }
  40
  41 static struct led_classdev hp6xx_red_led = {
  42         .name                   = "hp6xx:red",
  43         .default_trigger        = "hp6xx-charge",
  44         .brightness_set         = hp6xxled_red_set,
  45         .flags                  = LED_CORE_SUSPENDRESUME,
  46 };
  47
  48 static struct led_classdev hp6xx_green_led = {
  49         .name                   = "hp6xx:green",
  50         .default_trigger        = "disk-activity",
  51         .brightness_set         = hp6xxled_green_set,
  52         .flags                  = LED_CORE_SUSPENDRESUME,
  53 };
  54
  55 static int hp6xxled_probe(struct platform_device *pdev)
  56 {
  57         int ret;
  58
  59         ret = devm_led_classdev_register(&pdev->dev, &hp6xx_red_led);
  60         if (ret < 0)
  61                 return ret;
  62
  63         return devm_led_classdev_register(&pdev->dev, &hp6xx_green_led);
  64 }
  65
  66 static struct platform_driver hp6xxled_driver = {
  67         .probe          = hp6xxled_probe,
  68         .driver         = {
  69                 .name           = "hp6xx-led",
  70         },
  71 };
  72
  73 module_platform_driver(hp6xxled_driver);
  74
  75 MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
  76 MODULE_DESCRIPTION("HP Jornada 6xx LED driver");
  77 MODULE_LICENSE("GPL");
  78 MODULE_ALIAS("platform:hp6xx-led");