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path: root/drivers/leds/leds-gpio.c (follow)
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* leds: leds-gpio: Set of_node for created LED devicesRafał Miłecki2016-07-111-2/+3
| | | | | | | | | | | | | | | | | | | When working with Device Tree we iterate over children of "gpio-leds" compatible node and create LED device for each of them. We take care of all common DT properties (label, default trigger, state, etc.), however some triggers may want to support more of them. It could be useful for timer trigger to support setting delay on/off values with Device Tree property. Or for transient trigger to support e.g. duration property. We obviously should handle such properties in triggers, not in generic code. To let trigger drivers read properties from DT node we need to set of_node to point the relevant node. This change allows using all kind of of helpers in e.g. "activate" callbacks. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
* leds: gpio: Support the "panic-indicator" firmware propertyEzequiel Garcia2016-05-061-0/+4
| | | | | | | | | | | | | Calling a GPIO LEDs is quite likely to work even if the kernel has paniced, so they are ideal to blink in this situation. This commit adds support for the new "panic-indicator" firmware property, allowing to mark a given LED to blink 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>
* leds: gpio: Use GPIOF_OUT_INIT_LOW instead of hardcoded zeroGeert Uytterhoeven2016-03-141-1/+1
| | | | | | | | Use the GPIO flag definition instead of a numeric literal, so the casual reader grepping for GPIOF_ will find the GPIO flags used. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
* leds: leds-gpio: Fix return value check in create_gpio_led()Wei Yongjun2016-03-141-2/+2
| | | | | | | | | In case of error, the function gpio_to_desc() returns NULL pointer not ERR_PTR(). The IS_ERR() test in the return value check should be replaced with NULL test. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
* leds: gpio: Remove work queueJacek Anaszewski2016-01-041-40/+22
| | | | | | | | Now the core implements the work queue, remove it from the drivers, and switch to using brightness_set_blocking op. Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com> Cc: Raphael Assenat <raph@8d.com>
* leds: leds-gpio: add shutdown functionHeiko Schocher2015-11-031-0/+13
| | | | | | | | add a shutdown function for setting the gpio-leds into off state when shuting down. Signed-off-by: Heiko Schocher <hs@denx.de> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
* Merge branch 'for-next' of ↵Linus Torvalds2015-07-021-4/+8
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds Pull LED subsystem updates from Bryan Wu: "In this cycle, we finished to merge patches for LED Flash class driver. Other than that we have some bug fixes and new drivers for LED controllers" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds: (33 commits) leds:lp55xx: fix firmware loading error leds: fix max77693-led build errors leds: fix aat1290 build errors leds: aat1290: pass flags parameter to devm_gpiod_get leds: ktd2692: pass flags parameter to devm_gpiod_get drivers/leds: don't use module_init in non-modular leds-cobalt-raq.c leds: aat1290: add support for V4L2 Flash sub-device DT: aat1290: Document handling external strobe sources leds: max77693: add support for V4L2 Flash sub-device media: Add registration helpers for V4L2 flash sub-devices v4l: async: Add a pointer to of_node to struct v4l2_subdev, match it Documentation: leds: Add description of v4l2-flash sub-device leds: add BCM6358 LED driver leds: add DT binding for BCM6358 LED controller leds: fix brightness changing when software blinking is active Documentation: leds-lp5523: describe master fader attributes leds: lp5523: add master_fader support leds: leds-gpio: Allow compile test if !GPIOLIB leds: leds-gpio: Add missing #include <linux/of.h> gpiolib: Add missing dummies for the unified device properties interface ...
| * leds: leds-gpio: Add missing #include <linux/of.h>Geert Uytterhoeven2015-05-251-0/+1
| | | | | | | | | | | | Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Jacek Anaszewski <j.anaszewski@samsung.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
| * leds: gpio: Fix error handling for led name null pointer caseJacek Anaszewski2015-05-041-2/+4
| | | | | | | | | | | | | | | | | | Make sure that already registered LEDs will be torn down properly if the name of the next LED to create is unavailable. Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Bryan Wu <cooloney@gmail.com>
| * leds: gpio: Fix device teardown on probe deferralSebastian Hesselbarth2015-05-041-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | In gpio_leds_create(), when devm_get_gpiod_from_child() fails with -EPROBE_DEFER on the second gpio led to be created, the first already registered led is not torn down properly. This causes create_gpio_led() to fail for the first led on re-probe(). Fix this misbehaviour by incrementing num_leds only if all potentially failing calls completed successfully. Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Acked-by: Jacek Anaszewski <j.anaszewski@samsung.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
* | ACPI / OF: Rename of_node() and acpi_node() to to_of_node() and to_acpi_node()Alexander Sverdlin2015-06-241-1/+1
|/ | | | | | | | | | | | | Commit 8a0662d9 introduced of_node and acpi_node symbols in global namespace but there were already ~63 of_node local variables or function parameters (no single acpi_node though, but anyway). After debugging undefined but used of_node local varible (which turned out to reference static function of_node() instead) it became clear that the names for the functions are too short and too generic for global scope. Signed-off-by: Alexander Sverdlin <alexander.sverdlin@gmail.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* gpio: add parameter to allow the use named gpiosOlliver Schinagl2015-03-041-1/+1
| | | | | | | | | | | | | | The gpio binding document says that new code should always use named gpios. Patch 40b73183 added support to parse a list of gpios from child nodes, but does not make it possible to use named gpios. This patch adds the con_id property and implements it is done in gpiolib.c, where the old-style of using unnamed gpios still works. Signed-off-by: Olliver Schinagl <oliver@schinagl.nl> Acked-by: Bryan Wu <cooloney@gmail.com> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* leds: leds-gpio: Pass on error codes unmodifiedSoren Brinkmann2015-02-021-1/+2
| | | | | | | | | | | Instead of overriding error codes, pass them on unmodified. This way a EPROBE_DEFER is correctly passed to the driver core. This results in the LED driver correctly requesting probe deferral in cases the GPIO controller is not yet available. Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com> Reported-and-tested-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Bryan Wu <cooloney@gmail.com>
* Merge tag 'pm+acpi-3.19-rc1-2' of ↵Linus Torvalds2014-12-191-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull more ACPI and power management updates from Rafael Wysocki: "These are regression fixes (leds-gpio, ACPI backlight driver, operating performance points library, ACPI device enumeration messages, cpupower tool), other bug fixes (ACPI EC driver, ACPI device PM), some cleanups in the operating performance points (OPP) framework, continuation of CONFIG_PM_RUNTIME elimination, a couple of minor intel_pstate driver changes, a new MAINTAINERS entry for it and an ACPI fan driver change needed for better support of thermal management in user space. Specifics: - Fix a regression in leds-gpio introduced by a recent commit that inadvertently changed the name of one of the properties used by the driver (Fabio Estevam). - Fix a regression in the ACPI backlight driver introduced by a recent fix that missed one special case that had to be taken into account (Aaron Lu). - Drop the level of some new kernel messages from the ACPI core introduced by a recent commit to KERN_DEBUG which they should have used from the start and drop some other unuseful KERN_ERR messages printed by ACPI (Rafael J Wysocki). - Revert an incorrect commit modifying the cpupower tool (Prarit Bhargava). - Fix two regressions introduced by recent commits in the OPP library and clean up some existing minor issues in that code (Viresh Kumar). - Continue to replace CONFIG_PM_RUNTIME with CONFIG_PM throughout the tree (or drop it where that can be done) in order to make it possible to eliminate CONFIG_PM_RUNTIME (Rafael J Wysocki, Ulf Hansson, Ludovic Desroches). There will be one more "CONFIG_PM_RUNTIME removal" batch after this one, because some new uses of it have been introduced during the current merge window, but that should be sufficient to finally get rid of it. - Make the ACPI EC driver more robust against race conditions related to GPE handler installation failures (Lv Zheng). - Prevent the ACPI device PM core code from attempting to disable GPEs that it has not enabled which confuses ACPICA and makes it report errors unnecessarily (Rafael J Wysocki). - Add a "force" command line switch to the intel_pstate driver to make it possible to override the blacklisting of some systems in that driver if needed (Ethan Zhao). - Improve intel_pstate code documentation and add a MAINTAINERS entry for it (Kristen Carlson Accardi). - Make the ACPI fan driver create cooling device interfaces witn names that reflect the IDs of the ACPI device objects they are associated with, except for "generic" ACPI fans (PNP ID "PNP0C0B"). That's necessary for user space thermal management tools to be able to connect the fans with the parts of the system they are supposed to be cooling properly. From Srinivas Pandruvada" * tag 'pm+acpi-3.19-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (32 commits) MAINTAINERS: add entry for intel_pstate ACPI / video: update the skip case for acpi_video_device_in_dod() power / PM: Eliminate CONFIG_PM_RUNTIME NFC / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM SCSI / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM ACPI / EC: Fix unexpected ec_remove_handlers() invocations Revert "tools: cpupower: fix return checks for sysfs_get_idlestate_count()" tracing / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM x86 / PM: Replace CONFIG_PM_RUNTIME in io_apic.c PM: Remove the SET_PM_RUNTIME_PM_OPS() macro mmc: atmel-mci: use SET_RUNTIME_PM_OPS() macro PM / Kconfig: Replace PM_RUNTIME with PM in dependencies ARM / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM sound / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM phy / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM video / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM tty / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM spi: Replace CONFIG_PM_RUNTIME with CONFIG_PM ACPI / PM: Do not disable wakeup GPEs that have not been enabled ACPI / utils: Drop error messages from acpi_evaluate_reference() ...
| * leds: leds-gpio: Fix the "default-state" property checkFabio Estevam2014-12-101-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit a43f2cbbb009f9 ("leds: leds-gpio: Make use of device property API") caused a regression by reading the incorrect string for the "default-state" property. Fix the property string check to restore the original behaviour. Fixes: a43f2cbbb009 (leds: leds-gpio: Make use of device property API) Reported-by: Jean-Michel Hautbois <jean-michel.hautbois@vodalys.com> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Acked-by: Bryan Wu <cooloney@gmail.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* | Merge tag 'driver-core-3.19-rc1' of ↵Linus Torvalds2014-12-151-1/+0
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core update from Greg KH: "Here's the set of driver core patches for 3.19-rc1. They are dominated by the removal of the .owner field in platform drivers. They touch a lot of files, but they are "simple" changes, just removing a line in a structure. Other than that, a few minor driver core and debugfs changes. There are some ath9k patches coming in through this tree that have been acked by the wireless maintainers as they relied on the debugfs changes. Everything has been in linux-next for a while" * tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits) Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries" fs: debugfs: add forward declaration for struct device type firmware class: Deletion of an unnecessary check before the function call "vunmap" firmware loader: fix hung task warning dump devcoredump: provide a one-way disable function device: Add dev_<level>_once variants ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries ath: use seq_file api for ath9k debugfs files debugfs: add helper function to create device related seq_file drivers/base: cacheinfo: remove noisy error boot message Revert "core: platform: add warning if driver has no owner" drivers: base: support cpu cache information interface to userspace via sysfs drivers: base: add cpu_device_create to support per-cpu devices topology: replace custom attribute macros with standard DEVICE_ATTR* cpumask: factor out show_cpumap into separate helper function driver core: Fix unbalanced device reference in drivers_probe driver core: fix race with userland in device_add() sysfs/kernfs: make read requests on pre-alloc files use the buffer. sysfs/kernfs: allow attributes to request write buffer be pre-allocated. fs: sysfs: return EGBIG on write if offset is larger than file size ...
| * Merge branch 'platform/remove_owner' of ↵Greg Kroah-Hartman2014-11-041-1/+0
| |\ | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux into driver-core-next Remove all .owner fields from platform drivers
| | * leds: drop owner assignment from platform_driversWolfram Sang2014-10-201-1/+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>
* | | leds: leds-gpio: Fix multiple instances registration without 'label' propertyFabio Estevam2014-12-041-1/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since commit a43f2cbbb009f96 ("leds: leds-gpio: Make use of device property API") it is no longer possible to register multiple gpio leds without passing the 'label' property. According to Documentation/devicetree/bindings/leds/common.txt: "Optional properties for child nodes: - label : The label for this LED. If omitted, the label is taken from the node name (excluding the unit address)." So retrieve the node name when the 'label' property is absent to keep the old behaviour and fix this regression. Fixes: a43f2cbbb009 (leds: leds-gpio: Make use of device property API) Reported-by: Jean-Michel Hautbois <jean-michel.hautbois@vodalys.com> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Acked-by: Grant Likely <grant.likely@linaro.org> Acked-by: Bryan Wu <cooloney@gmail.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* | | leds: leds-gpio: Fix legacy GPIO number caseGeert Uytterhoeven2014-11-061-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In the legacy case, led_dat->gpiod is initialized correctly, but overwritten later by template->gpiod, which is NULL, causing leds-gpio to fail with: gpiod_direction_output: invalid GPIO leds-gpio: probe of leds-gpio failed with error -22 Move the initialization of led_dat->gpiod from template->gpiod up, and always use led_dat->gpiod later, to fix this. Fixes: 5c51277a9ababfa4 (leds: leds-gpio: Add support for GPIO descriptors) Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* | | leds: leds-gpio: Convert gpio_blink_set() to use GPIO descriptorsMika Westerberg2014-11-041-18/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 21f2aae91e902aad ("leds: leds-gpio: Add support for GPIO descriptors") already converted most of the driver to use GPIO descriptors. What is still missing is the platform specific hook gpio_blink_set() and board files which pass legacy GPIO numbers to this driver in platform data. In this patch we handle the former and convert gpio_blink_set() to take GPIO descriptor instead. In order to do this we convert the existing four users to accept GPIO descriptor and translate it to legacy GPIO number in the platform code. This effectively "pushes" legacy GPIO number usage from the driver to platforms. Also add comment to the remaining block describing that it is legacy code path and we are getting rid of it eventually. Suggested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* | | leds: leds-gpio: Make use of device property APIRafael J. Wysocki2014-11-041-37/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make use of device property API in this driver so that both OF and ACPI based system can use the same driver. This change contains material from Max Eliaser and Mika Westerberg. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Bryan Wu <cooloney@gmail.com> Acked-by: Grant Likely <grant.likely@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* | | leds: leds-gpio: Add support for GPIO descriptorsMika Westerberg2014-11-041-35/+45
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | GPIO descriptors are the preferred way over legacy GPIO numbers nowadays. Convert the driver to use GPIO descriptors internally but still allow passing legacy GPIO numbers from platform data to support existing platforms. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Alexandre Courbot <acourbot@nvidia.com> Acked-by: Bryan Wu <cooloney@gmail.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Grant Likely <grant.likely@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* | leds: gpio: cleanup the leds-gpio driverXiubo Li2014-09-291-3/+1
| | | | | | | | | | | | | | Remove stray blank line and space. Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
* | led: gpio: Sort include headers alphabeticallyXiubo Li2014-09-291-5/+5
|/ | | | | | | | | | If the inlcude headers aren't sorted alphabetically, then the logical choice is to append new ones, however that creates a lot of potential for conflicts or duplicates because every change will then add new includes in the same location. Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
* leds-gpio: of: introduce MODULE_DEVICE_TABLE for module autoloadingPaolo Pisati2014-03-061-0/+2
| | | | | | | Enable autoloading of leds-gpio module when a corresponing DT entry is present. Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
* drivers/leds: delete non-required instances of include <linux/init.h>Paul Gortmaker2014-02-271-1/+0
| | | | | | | | | | | | | None of these files are actually using any __init type directives and hence don't need to include <linux/init.h>. Most are just a left over from __devinit and __cpuinit removal, or simply due to code getting copied from one driver to the next. 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: Bryan Wu <cooloney@gmail.com>
* leds: leds-gpio: add retain-state-suspended propertyRobin Gong2014-02-271-0/+3
| | | | | | | | | | Some gpio-leds need retain the state even in suspend, such as charger led. But this property missed in devicetree, add it. (cooloney@gmail.com: fold DT binding updates into this patch) Signed-off-by: Robin Gong <b38343@freescale.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
* leds-gpio: of: led should not be created if its status is disabledJosh Wu2013-10-251-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | now the leds-gpio driver will create every child led node without checking the status is disabled or not. for example, if we have a led node like d3, and its status is disabled: leds { d3 { label = "d3"; gpios = <&pioE 24 0>; status = "disabled"; }; }; we except the d3 should not be created. And the gpios should not be request as well. But current driver will create d3 and request its gpio. This patch fix this by using for_each_available_child_of_node() and of_get_available_child_count() to enumerate all child nodes. So the disabled node will be inavailable. Signed-off-by: Josh Wu <josh.wu@atmel.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
* leds: Include linux/of.h headerSachin Kamat2013-10-221-0/+1
| | | | | | | 'of_match_ptr' is defined in linux/of.h. Include it explicitly. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Bryan Wu <cooloney@gmail.com>
* leds: use dev_get_platdata()Jingoo Han2013-08-271-1/+1
| | | | | | | | 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>
* leds: leds-gpio: Let device core handle pinctrlFabio Estevam2013-06-211-6/+0
| | | | | | | | | | Since commit ab78029 (drivers/pinctrl: grab default handles from device core) we can rely on device core for handling pinctrl, so remove devm_pinctrl_get_select_default() from the driver. Reported-by: Stephen Warren <warren@wwwdotorg.org> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
* leds: leds-gpio: remove unnecessary platform_set_drvdata()Jingoo Han2013-06-211-2/+0
| | | | | | | | | | The driver core clears the driver data to NULL after device_release or on probe failure, since commit 0998d0631001288a5974afc0b2a5f568bcdecb4d (device-core: Ensure drvdata = NULL when no driver is bound). Thus, it is not needed to manually clear the device driver data to NULL. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
* leds: leds-gpio: reserve gpio before using itTimo Teräs2013-05-211-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit a99d76f (leds: leds-gpio: use gpio_request_one) and commit 2d7c22f (leds: leds-gpio: set devm_gpio_request_one() flags param correctly) which was a fix of the first one. The conversion to devm_gpio_request in commit e3b1d44c (leds: leds-gpio: use devm_gpio_request_one) is not reverted. The problem is that gpio_cansleep() and gpio_get_value_cansleep() calls can crash if the gpio is not first reserved. Incidentally this same bug existed earlier and was fixed similarly in commit d95cbe61 (leds: Fix potential leds-gpio oops). But the OOPS is real. It happens when GPIOs are provided by module which is not yet loaded. So this fixes the following BUG during my ALIX boot (3.9.2-vanilla): BUG: unable to handle kernel NULL pointer dereference at 0000004c IP: [<c11287d6>] __gpio_cansleep+0xe/0x1a *pde = 00000000 Oops: 0000 [#1] SMP Modules linked in: leds_gpio(+) via_rhine mii cs5535_mfd mfd_core geode_rng rng_core geode_aes isofs nls_utf8 nls_cp437 vfat fat ata_generic pata_amd pata_cs5536 pata_acpi libata ehci_pci ehci_hcd ohci_hcd usb_storage usbcore usb_common sd_mod scsi_mod squashfs loop Pid: 881, comm: modprobe Not tainted 3.9.2 #1-Alpine EIP: 0060:[<c11287d6>] EFLAGS: 00010282 CPU: 0 EIP is at __gpio_cansleep+0xe/0x1a EAX: 00000000 EBX: cf364018 ECX: c132b8b9 EDX: 00000000 ESI: c13993a4 EDI: c1399370 EBP: cded9dbc ESP: cded9dbc DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 CR0: 8005003b CR2: 0000004c CR3: 0f0c4000 CR4: 00000090 DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 DR6: ffff0ff0 DR7: 00000400 Process modprobe (pid: 881, ti=cded8000 task=cf094aa0 task.ti=cded8000) Stack: cded9de0 d09471cb 00000000 c1399260 cf364014 00000000 c1399260 c1399254 d0949014 cded9df4 c118cd59 c1399260 d0949014 d0949014 cded9e08 c118ba47 c1399260 d0949014 c1399294 cded9e1c c118bb75 cded9e24 d0949014 00000000 Call Trace: [<d09471cb>] gpio_led_probe+0xba/0x203 [leds_gpio] [<c118cd59>] platform_drv_probe+0x26/0x48 [<c118ba47>] driver_probe_device+0x75/0x15c [<c118bb75>] __driver_attach+0x47/0x63 [<c118a727>] bus_for_each_dev+0x3c/0x66 [<c118b6f9>] driver_attach+0x14/0x16 [<c118bb2e>] ? driver_probe_device+0x15c/0x15c [<c118b3d5>] bus_add_driver+0xbd/0x1bc [<d08b4000>] ? 0xd08b3fff [<d08b4000>] ? 0xd08b3fff [<c118bffc>] driver_register+0x74/0xec [<d08b4000>] ? 0xd08b3fff [<c118c8e8>] platform_driver_register+0x38/0x3a [<d08b400d>] gpio_led_driver_init+0xd/0x1000 [leds_gpio] [<c100116c>] do_one_initcall+0x6b/0x10f [<d08b4000>] ? 0xd08b3fff [<c105e918>] load_module+0x1631/0x1907 [<c10975d6>] ? insert_vmalloc_vmlist+0x14/0x43 [<c1098d5b>] ? __vmalloc_node_range+0x13e/0x15f [<c105ec50>] sys_init_module+0x62/0x77 [<c1257888>] syscall_call+0x7/0xb EIP: [<c11287d6>] __gpio_cansleep+0xe/0x1a SS:ESP 0068:cded9dbc CR2: 000000000000004c ---[ end trace 5308fb20d2514822 ]--- Signed-off-by: Timo Teräs <timo.teras@iki.f> Cc: Sachin Kamat <sachin.kamat@linaro.org> Cc: Raphael Assenat <raph@8d.com> Cc: Trent Piepho <tpiepho@freescale.com> Cc: Javier Martinez Canillas <javier.martinez@collabora.co.uk> Cc: Arnaud Patard <arnaud.patard@rtp-net.org> Cc: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Acked-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
* leds: leds-gpio: set devm_gpio_request_one() flags param correctlyJavier Martinez Canillas2013-01-031-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit a99d76f leds: leds-gpio: use gpio_request_one changed the leds-gpio driver to use gpio_request_one() instead of gpio_request() + gpio_direction_output() Unfortunately, it also made a semantic change that breaks the leds-gpio driver. The gpio_request_one() flags parameter was set to: GPIOF_DIR_OUT | (led_dat->active_low ^ state) Since GPIOF_DIR_OUT is 0, the final flags value will just be the XOR'ed value of led_dat->active_low and state. This value were used to distinguish between HIGH/LOW output initial level and call gpio_direction_output() accordingly. With this new semantic gpio_request_one() will take the flags value of 1 as a configuration of input direction (GPIOF_DIR_IN) and will call gpio_direction_input() instead of gpio_direction_output(). int gpio_request_one(unsigned gpio, unsigned long flags, const char *label) { .. if (flags & GPIOF_DIR_IN) err = gpio_direction_input(gpio); else err = gpio_direction_output(gpio, (flags & GPIOF_INIT_HIGH) ? 1 : 0); .. } The right semantic is to evaluate led_dat->active_low ^ state and set the output initial level explicitly. Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk> Reported-by: Arnaud Patard <arnaud.patard@rtp-net.org> Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
* Merge branch 'for-next' of ↵Linus Torvalds2012-12-151-19/+18
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds Pull LED subsystem update from Bryan Wu. * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds: (47 commits) leds: leds-lp5521: return an error code on error in probe() leds: leds-clevo-mail: Use pr_* instead of printks leds: leds-rb532: Fix checkpatch errors leds: led-triggers: Fix checkpatch warnings leds: ledtrig-backlight: Fix checkpatch error leds: leds-wrap: Use <linux/io.h> instead of <asm/io.h> leds: leds-wm8350: Use dev_err instead of printk leds: leds-pwm: Fix checkpatch warning leds: leds-pca955x: Use dev_info instead of printk leds: leds-net48xx: Use linux/io.h instead of asm/io.h leds: leds-lt3593: Fix checkpatch warnings leds: leds-gpio: Use dev_info instead of printk leds: leds-da903x: Fix checkpatch error and warnings leds: leds-bd2802: Fix checkpatch warnings leds: leds-adp5520: Fix checkpatch warnings leds: led-class: Fix checkpatch warning leds: leds-ns2: use devm_gpio_request_one leds: leds-lt3593: use devm_gpio_request_one leds: leds-gpio: use devm_gpio_request_one leds: lp3944: Fix return value ...
| * leds: leds-gpio: Use dev_info instead of printkSachin Kamat2012-11-271-1/+1
| | | | | | | | | | | | | | | | | | | | Fixes the following checkpatch warning: WARNING: Prefer netdev_info(netdev, ... then dev_info(dev, ... then pr_info(... to printk(KERN_INFO ... FILE: leds/leds-gpio.c:105: printk(KERN_INFO "Skipping unavailable LED gpio %d (%s)\n", Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Bryan Wu <cooloney@gmail.com>
| * leds: leds-gpio: use devm_gpio_request_oneSachin Kamat2012-11-271-6/+2
| | | | | | | | | | | | | | | | | | | | devm_gpio_request_one is device managed and makes error handling and cleanup simpler. Cc: Raphael Assenat <raph@8d.com> Cc: Trent Piepho <tpiepho@freescale.com> Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Bryan Wu <cooloney@gmail.com>
| * leds: leds-gpio: Defer probing in case of deferred gpio probingRoland Stigge2012-11-261-6/+11
| | | | | | | | | | | | | | | | | | | | This patch makes leds-gpio's probe() return -EPROBE_DEFER if any of the gpios to register are deferred themselves. This makes a change of gpio_leds_create_of()'s return value necessary: Instead of returning NULL on error, we now use ERR_PTR() error coding. Signed-off-by: Roland Stigge <stigge@antcom.de> Signed-off-by: Bryan Wu <cooloney@gmail.com>
| * leds: leds-gpio: use gpio_request_oneJingoo Han2012-11-261-7/+5
| | | | | | | | | | | | | | | | Using gpio_request_one can make the code simpler because it can set the direction and initial value in one shot. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
* | leds: remove use of __devexitBill Pemberton2012-11-281-1/+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>
* | leds: remove use of __devinitBill Pemberton2012-11-281-4/+4
| | | | | | | | | | | | | | | | | | | | | | 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>
* | leds: remove use of __devexit_pBill Pemberton2012-11-281-1/+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>
* leds: leds-gpio: adopt pinctrl supportAnilKumar Ch2012-09-111-0/+7
| | | | | | | | | | | Adopt pinctrl support to leds-gpio driver based on leds-gpio device pointer, pinctrl driver configure SoC pins to GPIO mode according to definitions provided in .dts file. Signed-off-by: AnilKumar Ch <anilkumar@ti.com> Acked-by: Marek Vasut <marex@denx.de> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
* leds: leds-gpio: Use of_get_child_count() helperTobias Klauser2012-09-111-3/+2
| | | | | | | Use of_get_child_count() instead of custom implementation. Signed-off-by: Tobias Klauser <klto@zhaw.ch> Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
* leds: leds-gpio: Use platform_{get,set}_drvdataTobias Klauser2012-09-111-2/+2
| | | | | | | | Use the wrapper functions, so we can directly pass a struct platfrom_device. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
* leds: leds-gpio: use of_match_ptr()Tobias Klauser2012-09-111-2/+1
| | | | | | | | Instead of having to define the match table to NULL if CONFIG_OF isn't set, use the of_match_ptr() macro which will do this for us. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
* leds: Use devm_kzalloc in leds-gpio.c fileSachin Kamat2012-07-241-6/+5
| | | | | | | devm_kzalloc() makes cleanup simpler. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
* drivers/leds/leds-gpio.c: use linux/gpio.h rather than asm/gpio.hMark Brown2012-03-241-2/+1
| | | | | | | | | | Direct usage of the asm include has long been deprecated by the introduction of gpiolib. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* leds: convert led platform drivers to module_platform_driverAxel Lin2012-01-111-14/+2
| | | | | | | | | | | | | | | 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>
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