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path: root/drivers/leds/leds-regulator.c
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2023-11-01leds: Convert all platform drivers to return voidUwe Kleine-König1-3/+2
The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is ignored (apart from emitting a warning) and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new() which already returns void. Eventually after all drivers are converted, .remove_new() is renamed to .remove(). All platform drivers below drivers/leds/ unconditionally return zero in their remove callback and so can be converted trivially to the variant returning void. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20230917130947.1122198-1-u.kleine-koenig@pengutronix.de Signed-off-by: Lee Jones <lee@kernel.org>
2022-05-05leds: regulator: Make probeable from device treeLinus Walleij1-19/+23
The regulator LED can easily be adapted to probe from the device tree. We switch led_classdev_register() to led_classdev_register_ext() passing some struct led_init_data init_data that we leave NULL save the fwnode if platform data isn't present so that it will be populated from the device tree. If we have platform data we set up the name from the platform data but using init_data instead. Cc: Antonio Ospite <ao2@ao2.it> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Pavel Machek <pavel@ucw.cz>
2022-05-05leds: regulator: Add dev helper variableLinus Walleij1-6/+7
Instead of repeating the hard to read &pdev->dev just create a local struct device *dev in probe(). Cc: Antonio Ospite <ao2@ao2.it> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> 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>
2016-01-04leds: regulator: Remove work queueAndrew Lunn1-34/+12
Now the core implements the work queue, remove it from the drivers, and switch to using brightness_set_blocking op. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Acked-by: Antonio Ospite <ao2@ao2.it> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
2014-12-16Merge branch 'for-next' of ↵Linus Torvalds1-13/+5
git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds Pull LED subsystem update from Bryan Wu: "We got some cleanup and driver for LP8860 as well as some patches for LED Flash Class" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds: leds: lp8860: Fix module dependency leds: lp8860: Introduce TI lp8860 4 channel LED driver leds: Add support for setting brightness in a synchronous way leds: implement sysfs interface locking mechanism leds: syscon: handle multiple syscon instances leds: delete copy/paste mistake leds: regulator: Convert to devm_regulator_get_exclusive
2014-11-15leds: regulator: Convert to devm_regulator_get_exclusiveAxel Lin1-13/+5
Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
2014-10-20leds: drop owner assignment from platform_driversWolfram Sang1-1/+0
A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-27leds: use dev_get_platdata()Jingoo Han1-1/+2
Use the wrapper function for retrieving the platform data instead of accessing dev->platform_data directly. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
2012-11-29leds: remove use of __devexitBill Pemberton1-1/+1
CONFIG_HOTPLUG is going away as an option so __devexit is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Jan-Simon Moeller <jansimon.moeller@gmx.de> Acked-by: Bryan Wu <cooloney@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-29leds: remove use of __devinitBill Pemberton1-1/+1
CONFIG_HOTPLUG is going away as an option so __devinit is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Jan-Simon Moeller <jansimon.moeller@gmx.de> Acked-by: Bryan Wu <cooloney@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-29leds: remove use of __devexit_pBill Pemberton1-1/+1
CONFIG_HOTPLUG is going away as an option so __devexit_p is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Jan-Simon Moeller <jansimon.moeller@gmx.de> Acked-by: Bryan Wu <cooloney@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-07-24leds: Use devm_kzalloc in leds-regulator.c fileSachin Kamat1-6/+3
devm_kzalloc() makes cleanup simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
2012-01-11leds: convert led platform drivers to module_platform_driverAxel Lin1-11/+1
Factor out some boilerplate code for platform driver registration into module_platform_driver. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Haojian Zhuang <hzhuang1@marvell.com> [led-88pm860x.c] Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Michael Hennerich <hennerich@blackfin.uclinux.org> Cc: Mike Rapoport <mike@compulab.co.il> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-04-15leds/leds-regulator.c: fix handling of already enabled regulatorsAntonio Ospite1-0/+4
Make the driver aware of the initial status of the regulator. The leds-regulator driver was ignoring the initial status of the regulator; this resulted in rdev->use_count being incremented to 2 after calling regulator_led_set_value() in the .probe method when a regulator was already enabled at insmod time, which made it impossible to ever disable the regulator. Signed-off-by: Antonio Ospite <ospite@studenti.unina.it> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Antonio Ospite <ospite@studenti.unina.it> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: Liam Girdwood <lrg@slimlogic.co.uk> Cc: Daniel Ribeiro <drwyrm@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-30include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo1-0/+1
implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2009-12-17leds: Add LED class driver for regulator driven LEDs.Antonio Ospite1-0/+242
This driver provides an interface for controlling LEDs (or vibrators) connected to PMICs for which there is a regulator framework driver. This driver can be used, for instance, to control vibrator on all Motorola EZX phones using the pcap-regulator driver services. Signed-off-by: Antonio Ospite <ospite@studenti.unina.it> Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>