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path: root/drivers/leds/trigger/ledtrig-timer.c
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* treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500Thomas Gleixner2019-06-191-4/+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>
* leds: avoid flush_work in atomic contextPavel Machek2019-05-311-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | It turns out that various triggers use led_blink_setup() from atomic context, so we can't do a flush_work there. Flush is still needed for slow LEDs, but we can move it to sysfs code where it is safe. WARNING: inconsistent lock state 5.2.0-rc1 #1 Tainted: G W -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. swapper/1/0 [HC0[0]:SC1[1]:HE1:SE0] takes: 000000006e30541b ((work_completion)(&led_cdev->set_brightness_work)){+.?.}, at: +__flush_work+0x3b/0x38a {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x146/0x1a1 __flush_work+0x5b/0x38a flush_work+0xb/0xd led_blink_setup+0x1e/0xd3 led_blink_set+0x3f/0x44 tpt_trig_timer+0xdb/0x106 ieee80211_mod_tpt_led_trig+0xed/0x112 Fixes: 0db37915d912 ("leds: avoid races with workqueue") Signed-off-by: Pavel Machek <pavel@ucw.cz> Tested-by: Hugh Dickins <hughd@google.com> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
* leds: trigger: timer: Add initialization from Device TreeKrzysztof Kozlowski2019-01-161-0/+34
| | | | | | | | | | | Allow initialization of delays used in timer trigger from Device Tree property. This is especially useful for embedded systems where the trigger might be used early, before bringing up user-space. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
* leds: timer trigger: simplifications from core changesUwe Kleine-König2018-07-051-40/+13
| | | | | | | | | | | The trigger core learned error handling for the activate callback and can handle device attributes now. This allows simplifying the driver considerably. Note that .deactivate() is only called when .activate() succeeded, so the check for .trigger_data being non-NULL can go away. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
* leds: triggers: let struct led_trigger::activate() return an error codeUwe Kleine-König2018-07-051-3/+5
| | | | | | | | | | | | | Given that activating a trigger can fail, let the callback return an indication. This prevents to have a trigger active according to the "trigger" sysfs attribute but not functional. All users are changed accordingly to return 0 for now. There is no intended change in behaviour. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
* leds: triggers: make the MODULE_LICENSE string match the actual licenseUwe Kleine-König2018-07-051-2/+1
| | | | | | | | | | | | These files are licensed under GPL version 2 only. So use "GPL v2" instead of "GPL" (which means v2 or later). Also remove an empty (but commented) line at the end of the license header which nicely proves in the context that the drivers are really v2 only :-) Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
* leds: move LED trigger drivers into new subdirectoryKim, Milo2013-04-011-0/+130
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>