summaryrefslogtreecommitdiffstats
path: root/drivers/leds/trigger/ledtrig-cpu.c
AgeCommit message (Collapse)AuthorFilesLines
2021-05-28leds: trigger: ledtrig-cpu: Fix incorrectly documented param 'ledevt'Lee Jones1-1/+1
Fixes the following W=1 kernel build warning(s): drivers/leds/trigger/ledtrig-cpu.c:52: warning: Function parameter or member 'ledevt' not described in 'ledtrig_cpu' drivers/leds/trigger/ledtrig-cpu.c:52: warning: Excess function parameter 'evt' description in 'ledtrig_cpu' Cc: Pavel Machek <pavel@ucw.cz> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Bryan Wu <bryan.wu@canonical.com> Cc: linux-leds@vger.kernel.org Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Pavel Machek <pavel@ucw.cz>
2020-09-30ledtrig-cpu: Limit to 8 CPUsPavel Machek1-3/+10
Some machines have thousands of CPUs... and trigger mechanisms was not really meant for thousands of triggers. I doubt anyone uses this trigger on many-CPU machine; but if they do, they'll need to do it properly. Signed-off-by: Pavel Machek <pavel@ucw.cz>
2019-06-19treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500Thomas Gleixner1-5/+1
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>
2017-03-06leds/trigger/cpu: Add LED trigger for all CPUs aggregatedPaulo Costa1-2/+31
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>
2016-12-25cpu/hotplug: Cleanup state namesThomas Gleixner1-1/+1
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 Machek1-1/+1
Fix english spelling. Signed-off-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
2016-07-22leds/trigger/cpu: Move from CPU_STARTING to ONLINE levelSebastian Andrzej Siewior1-8/+8
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 Cochran1-17/+15
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>
2016-01-04leds: ledtrig-cpu: Make the driver explicitly non-modularPaul Gortmaker1-25/+1
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>
2014-05-08drivers/leds: Replace __get_cpu_var use through this_cpu_ptrChristoph Lameter1-1/+1
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 Moll1-0/+24
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>
2013-04-01leds: move LED trigger drivers into new subdirectoryKim, Milo1-0/+142
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>
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-07 15:10:16 +0000