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path: root/drivers/leds/trigger
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2017-07-06Merge tag 'leds_for_4.13' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds Pull LED updates from Jacek Anaszewski: "This time we're removing more than adding: Removed drivers: leds-versatile: - all users of the Versatile LED driver are deleted and replaced with the very generic leds-syscon leds-sead3: - SEAD3 is using the generic leds-syscon & regmap based register-bit-led driver LED class drivers improvements: ledtrig-gpio: - use threaded IRQ, which both simplifies the code because we can drop the workqueue indirection, and it enables using the trigger for GPIOs that work with threaded IRQs themselves - refresh LED state after GPIO change since the new GPIO may have a different state than the old one leds-lp55xx: - make various arrays static const leds-pca963x: - add bindings to invert polarity" * tag 'leds_for_4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds: leds: lp55xx: make various arrays static const leds: Remove SEAD-3 driver leds: trigger: gpio: Use threaded IRQ leds: trigger: gpio: Refresh LED state after GPIO change leds: Delete obsolete Versatile driver leds: pca963x: Add bindings to invert polarity
2017-06-13Revert "leds: handle suspend/resume in heartbeat trigger"Zhang Bo
This reverts commit 5ab92a7cb82c66bf30685583a38a18538e3807db. System cannot enter suspend mode because of heartbeat led trigger. In autosleep_wq, try_to_suspend function will try to enter suspend mode in specific period. it will get wakeup_count then call pm_notifier chain callback function and freeze processes. Heartbeat_pm_notifier is called and it call led_trigger_unregister to change the trigger of led device to none. It will send uevent message and the wakeup source count changed. As wakeup_count changed, suspend will abort. Fixes: 5ab92a7cb82c ("leds: handle suspend/resume in heartbeat trigger") Signed-off-by: Zhang Bo <bo.zhang@nxp.com> Acked-by: Pavel Machek <pavel@ucw.cz> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
2017-05-29leds: trigger: gpio: Use threaded IRQJan Kiszka
This both simplifies the code because we can drop the workqueue indirection, and it enables using the trigger for GPIOs that work with threaded IRQs themselves. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
2017-05-29leds: trigger: gpio: Refresh LED state after GPIO changeJan Kiszka
The new GPIO may have a different state than the old one. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
2017-03-06leds/trigger/cpu: Add LED trigger for all CPUs aggregatedPaulo Costa
Currently there is one CPU led trigger per cpu ('cpu0', 'cpu1', ...) This patch adds a new trigger, 'cpu', with brightness proportional to the number of active CPUs. If multiple brightness levels aren't supported on the LED, it effectively indicates if there is any CPU active. This is particularly useful on tiny linux boards with more CPU cores than LED pins. Signed-off-by: Paulo Costa <me@paulo.costa.nom.br> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
2017-03-02sched/headers: Prepare for new header dependencies before moving code to ↵Ingo Molnar
<linux/sched/loadavg.h> We are going to split <linux/sched/loadavg.h> out of <linux/sched.h>, which will have to be picked up from a couple of .c files. Create a trivial placeholder <linux/sched/topology.h> file that just maps to <linux/sched.h> to make this patch obviously correct and bisectable. Include the new header in the files that are going to need it. Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-02-14leds: ledtrig-heartbeat: Make top brightness adjustableJacek Anaszewski
LED class heartbeat trigger allowed only for blinking with max_brightness value. This patch adds more flexibility by exploiting part of LED core software blink infrastructure. Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com> Acked-by: Pavel Machek <pavel@ucw.cz> Reviewed-by: Hans de Goede <hdegoede@redhat.com>
2016-12-25cpu/hotplug: Cleanup state namesThomas Gleixner
When the state names got added a script was used to add the extra argument to the calls. The script basically converted the state constant to a string, but the cleanup to convert these strings into meaningful ones did not happen. Replace all the useless strings with 'subsys/xxx/yyy:state' strings which are used in all the other places already. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Link: http://lkml.kernel.org/r/20161221192112.085444152@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-11-22ledtrig-cpu.c: fix englishPavel Machek
Fix english spelling. Signed-off-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
2016-07-29Merge branch 'smp-hotplug-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull smp hotplug updates from Thomas Gleixner: "This is the next part of the hotplug rework. - Convert all notifiers with a priority assigned - Convert all CPU_STARTING/DYING notifiers The final removal of the STARTING/DYING infrastructure will happen when the merge window closes. Another 700 hundred line of unpenetrable maze gone :)" * 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (70 commits) timers/core: Correct callback order during CPU hot plug leds/trigger/cpu: Move from CPU_STARTING to ONLINE level powerpc/numa: Convert to hotplug state machine arm/perf: Fix hotplug state machine conversion irqchip/armada: Avoid unused function warnings ARC/time: Convert to hotplug state machine clocksource/atlas7: Convert to hotplug state machine clocksource/armada-370-xp: Convert to hotplug state machine clocksource/exynos_mct: Convert to hotplug state machine clocksource/arm_global_timer: Convert to hotplug state machine rcu: Convert rcutree to hotplug state machine KVM/arm/arm64/vgic-new: Convert to hotplug state machine smp/cfd: Convert core to hotplug state machine x86/x2apic: Convert to CPU hotplug state machine profile: Convert to hotplug state machine timers/core: Convert to hotplug state machine hrtimer: Convert to hotplug state machine x86/tboot: Convert to hotplug state machine arm64/armv8 deprecated: Convert to hotplug state machine hwtracing/coresight-etm4x: Convert to hotplug state machine ...
2016-07-22leds/trigger/cpu: Move from CPU_STARTING to ONLINE levelSebastian Andrzej Siewior
There is no need the ledtriger to be called *that* early in the hotplug process (+ with disabled interrupts). As explained by Jacek Anaszewski [0] there is no need for it. Therefore this patch moves it to the ONLINE/PREPARE_DOWN level using the dynamic registration for the id. [0] https://lkml.kernel.org/r/578C92BC.2070603@samsung.com Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Acked-by: Jacek Anaszewski <j.anaszewski@samsung.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: rt@linutronix.de Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: linux-leds@vger.kernel.org Link: http://lkml.kernel.org/r/1469028295-14702-1-git-send-email-bigeasy@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-07-15leds/trigger/cpu: Convert to hotplug state machineRichard Cochran
This is a straightforward conversion. We place this callback last in the list so that the LED illuminates only after a successful bring up sequence. ( NOTE: The patch adds a FIXME question about the callback used, this question should probably be revisited later on.) Signed-off-by: Richard Cochran <rcochran@linutronix.de> Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de> Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Acked-by: Jacek Anaszewski <j.anaszewski@samsung.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-leds@vger.kernel.org Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20160713153336.465496902@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-06-20leds: convert IDE trigger to common disk triggerStephan Linz
This patch converts the IDE specific LED trigger to a generic disk activity LED trigger. The libata core is now a trigger source just like before the IDE disk driver. It's merely a replacement of the string ide by disk. The patch is taken from http://dev.gentoo.org/~josejx/ata.patch and is widely used by any ibook/powerbook owners with great satisfaction. Likewise, it is very often used successfully on different ARM platforms. Unlike the original patch, the existing 'ide-disk' trigger is still available for backward compatibility. That reduce the amount of patches in affected device trees out of the mainline kernel. For further development, the new name 'disk-activity' should be used. Cc: Joseph Jezak <josejx@gentoo.org> Cc: Jörg Sommer <joerg@alea.gnuu.de> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Stephan Linz <linz@li-pro.net> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
2016-06-08leds: handle suspend/resume in heartbeat triggerLinus Walleij
The following phenomena was observed: when suspending the system, sometimes the heartbeat LED was left on, glowing and wasting power while the rest of the system is asleep, also disturbing power dissapation measures on the odd suspend cycle when it's left on. Clearly this is not how we want the heartbeat trigger to work: it should turn off and leave the LED off during system suspend. This removes the heartbeat trigger when preparing suspend and restores it during resume. The trigger code will make sure all LEDs are left in OFF state after removing the trigger, and will re-enable the trigger on all LEDs after resuming. Cc: linux-pm@vger.kernel.org Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
2016-05-06leds: triggers: Allow to switch the trigger to "panic" on a kernel panicEzequiel Garcia
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>
2016-04-19leds: ledtrig-ide-disk: Move ide_blink_delay to ledtrig_ide_activity()Jacek Anaszewski
Parameters delay_on and delay_off of led_trigger_blink_oneshot() are pointers, to enable blink interval adjustment by LED class drivers of the controllers that implement hardware blinking. Move ide_blink_delay variable to ledtrig_ide_activity() in order to prevent the situation when adjustment committed by one LED class driver influences blink interval of the software fallback blink feature, that is applied to the drivers that don't implement blink_set op. Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
2016-04-13leds: trigger: Introduce a MTD (NAND/NOR) triggerEzequiel Garcia
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>
2016-03-30leds: trigger: Introduce a kernel panic LED triggerEzequiel Garcia
This commit introduces a new LED trigger which allows to configure a LED to blink on a kernel panic (through panic_blink). Notice that currently the Openmoko FreeRunner (GTA02) mach code sets panic_blink to blink a hard-coded LED. The new trigger is meant to introduce a generic mechanism to achieve this. Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
2016-01-04leds: ledtrig-ide-disk: Make the driver explicitly non-modularPaul Gortmaker
The Kconfig for this driver is currently: config LEDS_TRIGGER_IDE_DISK bool "LED IDE Disk Trigger" ...meaning that it currently is not being built as a module by anyone. Lets remove the modular code that is essentially orphaned, so that when reading the driver there is no doubt it is builtin-only. Since module_init translates to device_initcall in the non-modular case, the init ordering remains unchanged with this commit. We also delete the MODULE_LICENSE tag etc. since all that information is already contained at the top of the file in the comments. Cc: Bryan Wu <cooloney@gmail.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: linux-leds@vger.kernel.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
2016-01-04leds: ledtrig-cpu: Make the driver explicitly non-modularPaul Gortmaker
The Kconfig for this driver is currently: config LEDS_TRIGGER_CPU bool "LED CPU Trigger" ...meaning that it currently is not being built as a module by anyone. Lets remove the modular code that is essentially orphaned, so that when reading the driver there is no doubt it is builtin-only. Since module_init translates to device_initcall in the non-modular case, the init ordering remains unchanged with this commit. We also delete the MODULE_LICENSE tag etc. since all that information is already contained at the top of the file in the comments. Cc: Bryan Wu <cooloney@gmail.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: linux-leds@vger.kernel.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
2016-01-04leds: triggers: oneshot: fix module license specificationUwe Kleine-König
The header of this file fixes the license to GPL 2 only without the option to use later version. So use the string "GPL v2" that is to be used in this case. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Fabio Baltieri <fabio.baltieri@gmail.com> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
2016-01-04leds: ledtrig-transient: fix duration to be msec instead of jiffiesRob Herring
The transient trigger duration is documented to be in msec units, but is actually in jiffies units. Other time based triggers are in msec units as well. Fix the timer setup to convert from msec. This could break an existing userspace that worked around this problem, but exposing jiffies to userspace is just wrong and would break anyway if HZ is changed. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Shuah Khan <shuahkhan@gmail.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: linux-leds@vger.kernel.org Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
2016-01-04leds: core: Add led_set_brightness_nosleep{nopm} functionsJacek Anaszewski
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>
2015-11-03leds: triggers: add invert to heartbeatJiri Prchal
This patch adds possibility to invert heartbeat blinking. The inverted LED is more time ON then OFF. It's because it looks better when the heartbeat LED is next to other LED which is most time ON. The invert value is exported same way via sysfs in file invert like oneshot. I get inspiration from this trigger. Signed-off-by: Jiri Prchal <jiri.prchal@aksignal.cz> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
2015-08-28leds: Allow compile test of GPIO consumers if !GPIOLIBGeert Uytterhoeven
The GPIO subsystem provides dummy GPIO consumer functions if GPIOLIB is not enabled. Hence drivers that depend on GPIOLIB, but use GPIO consumer functionality only, can still be compiled if GPIOLIB is not enabled. Relax the dependency on GPIOLIB if COMPILE_TEST is enabled, where appropriate. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: linux-leds@vger.kernel.org Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
2014-11-14leds: Add support for setting brightness in a synchronous wayJacek Anaszewski
There are use cases when setting a LED brightness has to have immediate effect (e.g. setting a torch LED brightness). This patch extends LED subsystem to support such operations. The LED subsystem internal API __led_set_brightness is changed to led_set_brightness_async and new led_set_brightness_sync API is added. Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Bryan Wu <cooloney@gmail.com>
2014-09-11leds: trigger: gpio: fix warning in gpio trigger for gpios whose accessor ↵Lothar Waßmann
function may sleep When using a GPIO driver whose accessor functions may sleep (e.g. an I2C GPIO extender like PCA9554) the following warning is issued: WARNING: CPU: 0 PID: 665 at drivers/gpio/gpiolib.c:2274 gpiod_get_raw_value+0x3c/0x48() Modules linked in: CPU: 0 PID: 665 Comm: kworker/0:2 Not tainted 3.16.0-karo+ #115 Workqueue: events gpio_trig_work [<c00142cc>] (unwind_backtrace) from [<c00118f8>] (show_stack+0x10/0x14) [<c00118f8>] (show_stack) from [<c001bf10>] (warn_slowpath_common+0x64/0x84) [<c001bf10>] (warn_slowpath_common) from [<c001bf4c>] (warn_slowpath_null+0x1c/0x24) [<c001bf4c>] (warn_slowpath_null) from [<c020a1b8>] (gpiod_get_raw_value+0x3c/0x48) [<c020a1b8>] (gpiod_get_raw_value) from [<c02f68a0>] (gpio_trig_work+0x1c/0xb0) [<c02f68a0>] (gpio_trig_work) from [<c0030c1c>] (process_one_work+0x144/0x38c) [<c0030c1c>] (process_one_work) from [<c0030ef8>] (worker_thread+0x60/0x5cc) [<c0030ef8>] (worker_thread) from [<c0036dd4>] (kthread+0xb4/0xd0) [<c0036dd4>] (kthread) from [<c000f0f0>] (ret_from_fork+0x14/0x24) ---[ end trace cd51a1dad8b86c9c ]--- Fix this by using the _cansleep() variant of gpio_get_value(). Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de> Signed-off-by: Bryan Wu <cooloney@gmail.com>
2014-05-08drivers/leds: Replace __get_cpu_var use through this_cpu_ptrChristoph Lameter
Use this_cpu_ptr for the address calculation instead of __get_cpu_var. Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
2014-02-27ledtrig-cpu: Handle CPU hot(un)pluggingPawel Moll
When CPU is hot(un)plugged, no syscore notification is being generated, nor is cpuidle involved. This leaves the CPU LED turned on, because the dying thread is doing some work (LED on) and than it is... well, dying (LED still on :-) Added notifier block for hot(un)plugging operations, generating existing trigger events. Signed-off-by: Pawel Moll <pawel.moll@arm.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
2013-08-26leds: trigger: ledtrig-backlight: Fix invalid memory access in fb_event ↵Manfred Schlaegl
notification callback fb_notifier_callback is called on any event fired by fb_notifier_call_chain. Events may, or may not contain some data (fb_event.data). In case of FB_EVENT_BLANK fb_event.data contains a pointer to an integer holdingthe blank state. The Problem is, that in ledtrig-backlight.c - fb_notifier_callback the pointer to blank state is dereferenced BEFORE the event-type is checked. Obviously this leads to problems with other events than FB_EVENT_BLANK, where fb_event.data is undefined or NULL. It seems, that this problem existed ever since the driver was added. Like in drivers/video/backlight/backlight.c line 43 I would suggest to return immediately on events other than FB_EVENT_BLANK. Signed-off-by: Manfred Schlaegl <manfred.schlaegl@gmx.at> Signed-off-by: Bryan Wu <cooloney@gmail.com>
2013-04-01leds: add camera LED triggersKim, Milo
Some LED devices support flash/torch functionality through the LED subsystem. This patch enables direct LED trigger controls by the driver. Flash on/off and torch on/off can be done simply by other driver space. Two trigger APIs are added, ledtrig_flash_ctrl() and ledtrig_torch_ctrl(). Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
2013-04-01leds: move LED trigger drivers into new subdirectoryKim, Milo
For better driver management, new subdirectory, 'trigger' is created. All LED trigger drivers are moved into this directory. Internal header, 'leds.h' is included in each LED trigger drivers. Fix the location of header file, "leds.h" -> "../leds.h" in driver files. One exception is here, 'ledtrig-timer.c'. There is no need to include 'leds.h'. so '#include "leds.h"' line was removed. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>