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Commit 4b721174 authored by Ezequiel Garcia's avatar Ezequiel Garcia Committed by Jacek Anaszewski
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leds: trigger: Introduce a MTD (NAND/NOR) trigger 



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: default avatarEzequiel Garcia <ezequiel@vanguardiasur.com.ar>
Acked-by: default avatarBoris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: default avatarJacek Anaszewski <j.anaszewski@samsung.com>
parent 0c034fe3

drivers/leds/trigger/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -41,6 +41,14 @@ config LEDS_TRIGGER_IDE_DISK 
	  This allows LEDs to be controlled by IDE disk activity.

	  If unsure, say Y.



config LEDS_TRIGGER_MTD

	bool "LED MTD (NAND/NOR) Trigger"

	depends on MTD

	depends on LEDS_TRIGGERS

	help

	  This allows LEDs to be controlled by MTD activity.

	  If unsure, say N.



config LEDS_TRIGGER_HEARTBEAT

	tristate "LED Heartbeat Trigger"

	depends on LEDS_TRIGGERS

drivers/leds/trigger/Makefile

+1 −0
Original line number Diff line number Diff line 
obj-$(CONFIG_LEDS_TRIGGER_TIMER)	+= ledtrig-timer.o

obj-$(CONFIG_LEDS_TRIGGER_ONESHOT)	+= ledtrig-oneshot.o

obj-$(CONFIG_LEDS_TRIGGER_IDE_DISK)	+= ledtrig-ide-disk.o

obj-$(CONFIG_LEDS_TRIGGER_MTD)		+= ledtrig-mtd.o

obj-$(CONFIG_LEDS_TRIGGER_HEARTBEAT)	+= ledtrig-heartbeat.o

obj-$(CONFIG_LEDS_TRIGGER_BACKLIGHT)	+= ledtrig-backlight.o

obj-$(CONFIG_LEDS_TRIGGER_GPIO)		+= ledtrig-gpio.o

drivers/leds/trigger/ledtrig-mtd.c

0 → 100644
+45 −0
Original line number Diff line number Diff line 
/*

 * LED MTD trigger

 *

 * Copyright 2016 Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>

 *

 * Based on LED IDE-Disk Activity Trigger

 *

 * Copyright 2006 Openedhand Ltd.

 *

 * Author: Richard Purdie <rpurdie@openedhand.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 */



#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/leds.h>



#define BLINK_DELAY 30



DEFINE_LED_TRIGGER(ledtrig_mtd);

DEFINE_LED_TRIGGER(ledtrig_nand);



void ledtrig_mtd_activity(void)

{

	unsigned long blink_delay = BLINK_DELAY;



	led_trigger_blink_oneshot(ledtrig_mtd,

				  &blink_delay, &blink_delay, 0);

	led_trigger_blink_oneshot(ledtrig_nand,

				  &blink_delay, &blink_delay, 0);

}

EXPORT_SYMBOL(ledtrig_mtd_activity);



static int __init ledtrig_mtd_init(void)

{

	led_trigger_register_simple("mtd", &ledtrig_mtd);

	led_trigger_register_simple("nand-disk", &ledtrig_nand);



	return 0;

}

device_initcall(ledtrig_mtd_init);

include/linux/leds.h

+6 −0
Original line number Diff line number Diff line
@@ -329,6 +329,12 @@ extern void ledtrig_ide_activity(void); 
static inline void ledtrig_ide_activity(void) {}

#endif



#ifdef CONFIG_LEDS_TRIGGER_MTD

extern void ledtrig_mtd_activity(void);

#else

static inline void ledtrig_mtd_activity(void) {}

#endif



#if defined(CONFIG_LEDS_TRIGGER_CAMERA) || defined(CONFIG_LEDS_TRIGGER_CAMERA_MODULE)

extern void ledtrig_flash_ctrl(bool on);

extern void ledtrig_torch_ctrl(bool on);