LXR linux/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
  17static 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
  29static 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
  41static 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
  48static 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
  55static 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
  66static struct platform_driver hp6xxled_driver = {
  67        .probe          = hp6xxled_probe,
  68        .driver         = {
  69                .name           = "hp6xx-led",
  70        },
  71};
  72
  73module_platform_driver(hp6xxled_driver);
  74
  75MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
  76MODULE_DESCRIPTION("HP Jornada 6xx LED driver");
  77MODULE_LICENSE("GPL");
  78MODULE_ALIAS("platform:hp6xx-led");
  79