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linux/drivers/leds/leds.h

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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 Based on 2 normalized pattern(s): 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 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 # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-04 10:11:33 +02:00
/* SPDX-License-Identifier: GPL-2.0-only */
[PATCH] LED: add LED class Add the foundations of a new LEDs subsystem. This patch adds a class which presents LED devices within sysfs and allows their brightness to be controlled. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31 12:31:04 +02:00
/*
* LED Core
*
* Copyright 2005 Openedhand Ltd.
*
* Author: Richard Purdie <rpurdie@openedhand.com>
*/
#ifndef __LEDS_H_INCLUDED
#define __LEDS_H_INCLUDED
leds: Fix leds_list_lock locking issues Covert leds_list_lock to a rw_sempahore to match previous LED trigger locking fixes, fixing lock ordering. Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
2008-01-01 00:09:44 +01:00
#include <linux/rwsem.h>
[PATCH] LED: add LED class Add the foundations of a new LEDs subsystem. This patch adds a class which presents LED devices within sysfs and allows their brightness to be controlled. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31 12:31:04 +02:00
#include <linux/leds.h>
leds: disable triggers on brightness set Disable any active triggers when the brightness attribute is set to zero. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Márton Németh <nm127@freemail.hu> Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
2008-03-09 21:54:37 +01:00
static inline int led_get_brightness(struct led_classdev *led_cdev)
{
return led_cdev->brightness;
}
leds: core: Move LED core callbacks out of led-class.c Since the API for controlling LED brightness and blinking is defined in the LED core, move the related timer and work callbacks to the led-core.c, and initialize them through a new led_core_init API. Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com> Acked-by: Andrew Lunn <andrew@lunn.ch> Acked-by: Pavel Machek <pavel@ucw.cz>
2015-09-28 14:38:04 +02:00
void led_init_core(struct led_classdev *led_cdev);
leds: delay led_set_brightness if stopping soft-blink Delay execution of led_set_brightness() if need to stop soft-blink timer. This allows led_set_brightness to be called in hard-irq context even if soft-blink was activated on that LED. Signed-off-by: Fabio Baltieri <fabio.baltieri@gmail.com> Cc: Pawel Moll <pawel.moll@arm.com> Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
2012-08-15 15:44:34 +02:00
void led_stop_software_blink(struct led_classdev *led_cdev);
leds: core: Add led_set_brightness_nosleep{nopm} functions This patch adds led_set_brightness_nosleep() and led_set_brightness_nopm() functions, that guarantee setting LED brightness in a non-blocking way. The latter is used from pm_ops context and doesn't modify the brightness cached in the struct led_classdev. Its execution always ends up with a call to brightness setting op - either directly or through a set_brightness_work, regardless of LED_SUSPENDED flag state. The patch also replaces led_set_brightness_async() with led_set_brightness_nosleep() in all places where the most vital was setting brightness in a non sleeping way but not necessarily asynchronously, which is not needed for non-blocking drivers. Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
2015-10-07 11:10:41 +02:00
void led_set_brightness_nopm(struct led_classdev *led_cdev,
enum led_brightness value);
void led_set_brightness_nosleep(struct led_classdev *led_cdev,
enum led_brightness value);
leds: delay led_set_brightness if stopping soft-blink Delay execution of led_set_brightness() if need to stop soft-blink timer. This allows led_set_brightness to be called in hard-irq context even if soft-blink was activated on that LED. Signed-off-by: Fabio Baltieri <fabio.baltieri@gmail.com> Cc: Pawel Moll <pawel.moll@arm.com> Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
2012-08-15 15:44:34 +02:00
leds: Fix leds_list_lock locking issues Covert leds_list_lock to a rw_sempahore to match previous LED trigger locking fixes, fixing lock ordering. Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
2008-01-01 00:09:44 +01:00
extern struct rw_semaphore leds_list_lock;
[PATCH] LED: add LED class Add the foundations of a new LEDs subsystem. This patch adds a class which presents LED devices within sysfs and allows their brightness to be controlled. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31 12:31:04 +02:00
extern struct list_head leds_list;
leds: triggers: Allow to switch the trigger to "panic" on a kernel panic This commit adds a new led_cdev flag LED_PANIC_INDICATOR, which allows to mark a specific LED to be switched to the "panic" trigger, on a kernel panic. This is useful to allow the user to assign a regular trigger to a given LED, and still blink that LED on a kernel panic. Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> Reviewed-by: Matthias Brugger <mbrugger@suse.com> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
2016-04-29 00:03:38 +02:00
extern struct list_head trigger_list;
leds: core: Add support for composing LED class device names Add generic support for composing LED class device name. The newly introduced led_compose_name() function composes device name according to either <color:function> or <devicename:color:function> pattern, depending on the configuration of initialization data. Backward compatibility with in-driver hard-coded LED class device names is assured thanks to the default_label and devicename properties of newly introduced struct led_init_data. In case none of the aforementioned properties was found, then, for OF nodes, the node name is adopted for LED class device name. At the occassion of amending the Documentation/leds/leds-class.txt unify spelling: colour -> color. Alongside these changes added is a new tool - tools/leds/get_led_device_info.sh. The tool allows retrieving details of a LED class device's parent device, which proves that using vendor or product name for devicename part of LED name doesn't convey any added value since that information had been already available in sysfs. The script performs also basic validation of a LED class device name. Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com> Cc: Baolin Wang <baolin.wang@linaro.org> Cc: Dan Murphy <dmurphy@ti.com> Cc: Daniel Mack <daniel@zonque.org> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Oleh Kravchenko <oleg@kaa.org.ua> Cc: Sakari Ailus <sakari.ailus@linux.intel.com> Cc: Simon Shields <simon@lineageos.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Pavel Machek <pavel@ucw.cz>
2019-06-09 20:19:04 +02:00
extern const char * const led_colors[LED_COLOR_ID_MAX];
[PATCH] LED: add LED class Add the foundations of a new LEDs subsystem. This patch adds a class which presents LED devices within sysfs and allows their brightness to be controlled. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31 12:31:04 +02:00
#endif /* __LEDS_H_INCLUDED */