LXR linux/drivers/leds/trigger/ledtrig-disk.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * LED Disk Activity Trigger
   4 *
   5 * Copyright 2006 Openedhand Ltd.
   6 *
   7 * Author: Richard Purdie <rpurdie@openedhand.com>
   8 */
   9
  10#include <linux/kernel.h>
  11#include <linux/init.h>
  12#include <linux/leds.h>
  13
  14#define BLINK_DELAY 30
  15
  16DEFINE_LED_TRIGGER(ledtrig_disk);
  17DEFINE_LED_TRIGGER(ledtrig_disk_read);
  18DEFINE_LED_TRIGGER(ledtrig_disk_write);
  19DEFINE_LED_TRIGGER(ledtrig_ide);
  20
  21void ledtrig_disk_activity(bool write)
  22{
  23        unsigned long blink_delay = BLINK_DELAY;
  24
  25        led_trigger_blink_oneshot(ledtrig_disk,
  26                                  &blink_delay, &blink_delay, 0);
  27        led_trigger_blink_oneshot(ledtrig_ide,
  28                                  &blink_delay, &blink_delay, 0);
  29        if (write)
  30                led_trigger_blink_oneshot(ledtrig_disk_write,
  31                                          &blink_delay, &blink_delay, 0);
  32        else
  33                led_trigger_blink_oneshot(ledtrig_disk_read,
  34                                          &blink_delay, &blink_delay, 0);
  35}
  36EXPORT_SYMBOL(ledtrig_disk_activity);
  37
  38static int __init ledtrig_disk_init(void)
  39{
  40        led_trigger_register_simple("disk-activity", &ledtrig_disk);
  41        led_trigger_register_simple("disk-read", &ledtrig_disk_read);
  42        led_trigger_register_simple("disk-write", &ledtrig_disk_write);
  43        led_trigger_register_simple("ide-disk", &ledtrig_ide);
  44
  45        return 0;
  46}
  47device_initcall(ledtrig_disk_init);
  48