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
  16 DEFINE_LED_TRIGGER(ledtrig_disk);
  17 DEFINE_LED_TRIGGER(ledtrig_disk_read);
  18 DEFINE_LED_TRIGGER(ledtrig_disk_write);
  19 DEFINE_LED_TRIGGER(ledtrig_ide);
  20
  21 void 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 }
  36 EXPORT_SYMBOL(ledtrig_disk_activity);
  37
  38 static 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 }
  47 device_initcall(ledtrig_disk_init);