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This commit introduces a MTD trigger for flash (NAND/NOR) device activity. The implementation is copied from IDE disk. This trigger deprecates the "nand-disk" LED trigger, but for backwards compatibility, we still keep the "nand-disk" trigger around. The motivation for deprecating the "nand-disk" LED trigger is that it only works for NAND drivers, whereas the "mtd" LED trigger is more generic (in fact, "nand-disk" currently only works for certain NAND drivers). Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
45 lines
1 KiB
C
45 lines
1 KiB
C
/*
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* LED MTD trigger
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*
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* Copyright 2016 Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
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*
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* Based on LED IDE-Disk Activity Trigger
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*
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* Copyright 2006 Openedhand Ltd.
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*
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* Author: Richard Purdie <rpurdie@openedhand.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/leds.h>
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#define BLINK_DELAY 30
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DEFINE_LED_TRIGGER(ledtrig_mtd);
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DEFINE_LED_TRIGGER(ledtrig_nand);
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void ledtrig_mtd_activity(void)
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{
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unsigned long blink_delay = BLINK_DELAY;
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led_trigger_blink_oneshot(ledtrig_mtd,
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&blink_delay, &blink_delay, 0);
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led_trigger_blink_oneshot(ledtrig_nand,
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&blink_delay, &blink_delay, 0);
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}
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EXPORT_SYMBOL(ledtrig_mtd_activity);
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static int __init ledtrig_mtd_init(void)
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{
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led_trigger_register_simple("mtd", &ledtrig_mtd);
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led_trigger_register_simple("nand-disk", &ledtrig_nand);
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return 0;
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}
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device_initcall(ledtrig_mtd_init);
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