drivers/leds/trigger/ledtrig-mtd.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * LED MTD trigger
   4  *
   5  * Copyright 2016 Ezequiel Garcia <[email protected]>
   6  *
   7  * Based on LED IDE-Disk Activity Trigger
   8  *
   9  * Copyright 2006 Openedhand Ltd.
  10  *
  11  * Author: Richard Purdie <[email protected]>
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/leds.h>
  17
  18 #define BLINK_DELAY 30
  19
  20 DEFINE_LED_TRIGGER(ledtrig_mtd);
  21 DEFINE_LED_TRIGGER(ledtrig_nand);
  22
  23 void ledtrig_mtd_activity(void)
  24 {
  25         unsigned long blink_delay = BLINK_DELAY;
  26
  27         led_trigger_blink_oneshot(ledtrig_mtd,
  28                                   &blink_delay, &blink_delay, 0);
  29         led_trigger_blink_oneshot(ledtrig_nand,
  30                                   &blink_delay, &blink_delay, 0);
  31 }
  32 EXPORT_SYMBOL(ledtrig_mtd_activity);
  33
  34 static int __init ledtrig_mtd_init(void)
  35 {
  36         led_trigger_register_simple("mtd", &ledtrig_mtd);
  37         led_trigger_register_simple("nand-disk", &ledtrig_nand);
  38
  39         return 0;
  40 }
  41 device_initcall(ledtrig_mtd_init);