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path: root/drivers/video/backlight
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2014-12-11Merge tag 'backlight-for-linus-3.19' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight Pull backlight updates from Lee Jones: - Clean-up leaky resources; pwm_bl - Simplify Device Tree initialisation; lp855x_bl - Add Regulator support; lp855x - Remove Bryan from the Maintainer list -- new baby, no time :) * tag 'backlight-for-linus-3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight: MAINTAINERS: Remove my name from Backlight subsystem backlight: lp855x: Add supply regulator to lp855x backlight: lp855x: Refactor DT parsing code backlight: pwm: Clean-up pwm requested using legacy API
2014-12-09backlight: lp855x: Add supply regulator to lp855xSean Paul
This patch adds a supply regulator to the lp855x platform data to facilitate powering on/off the 3V rail attached to the controller. Cc: Stéphane Marchesin <marcheu@chromium.org> Cc: Aaron Durbin <adurbin@chromium.org> Signed-off-by: Sean Paul <seanpaul@chromium.org> Acked-by: Milo Kim <milo.kim@ti.com> Acked-by: Bryan Wu <cooloney@gmail.com> Acked-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-12-09backlight: lp855x: Refactor DT parsing codeSean Paul
This patch refactors the dt parsing code to avoid setting platform_data, instead just setting lp->pdata directly. This facilitates easier probe deferral since the current scheme would require us to clear out dev->platform_data before deferring. Cc: Stéphane Marchesin <marcheu@chromium.org> Signed-off-by: Sean Paul <seanpaul@chromium.org> Acked-by: Milo Kim <milo.kim@ti.com> Acked-by: Bryan Wu <cooloney@gmail.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-11-19ARM: at91/Kconfig: remove unused config optionsNicolas Ferre
When removing old board !DT support, several Kconfig options were deleted. Propagate this removal to drivers Kconfig files. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-11-10backlight: pwm: Clean-up pwm requested using legacy APIVladimir Zapolskiy
If PWM device is requested by means of legacy API pwm_request(), its resources are not freed on module unbind, which may cause an oops on access, e.g. by reading /sys/kernel/debug/pwm. Reported-by: Dmitry Eremin-Solenikov <dmitry_eremin@mentor.com> Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-10-11Merge tag 'backlight-for-linus-3.18' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight Pull backlight driver updates from Lee Jones: "Changes to existing drivers: - Checkpatch fixes - Removal of unused code in generic_bl - Removal of superfluous .owner attribute No new or removed drivers/supported devices" * tag 'backlight-for-linus-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight: backlight: omap1: add blank line after declarations backlight: jornada720: Remove 'else' after a return backlight: jornada720: Remove 'else' after a return backlight: wm831x_bl: Add blank line after declarations backlight: tdo24m: Add blank line after declarations backlight: s6e63m0: Remove 'else' after a return backlight: pcf50633: Add blank line after declarations backlight: lp855x: Add blank line after declarations backlight: lms501kf03: Remove 'else' after a return backlight: lm3639: Remove unnecessary return statements backlight: ld9040: Remove 'else' after a return backlight: ili922x: Remove 'else' after a return backlight: cr_bllcd: Add blank line after declarations backlight: corgi_lcd: Add blank line after declarations backlight: ams369fg06: Remove 'else' after a return backlight: adp8870: Add blank line after declarations backlight: adp8860: Add blank line after declarations backlight: adp5520: Add blank line after declarations backlight: generic_bl: Remove unused function backlight: Remove .owner field for drivers using module_platform_driver
2014-10-07Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial Pull "trivial tree" updates from Jiri Kosina: "Usual pile from trivial tree everyone is so eagerly waiting for" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits) Remove MN10300_PROC_MN2WS0038 mei: fix comments treewide: Fix typos in Kconfig kprobes: update jprobe_example.c for do_fork() change Documentation: change "&" to "and" in Documentation/applying-patches.txt Documentation: remove obsolete pcmcia-cs from Changes Documentation: update links in Changes Documentation: Docbook: Fix generated DocBook/kernel-api.xml score: Remove GENERIC_HAS_IOMAP gpio: fix 'CONFIG_GPIO_IRQCHIP' comments tty: doc: Fix grammar in serial/tty dma-debug: modify check_for_stack output treewide: fix errors in printk genirq: fix reference in devm_request_threaded_irq comment treewide: fix synchronize_rcu() in comments checkstack.pl: port to AArch64 doc: queue-sysfs: minor fixes init/do_mounts: better syntax description MIPS: fix comment spelling powerpc/simpleboot: fix comment ...
2014-09-01treewide: fix errors in printkMasanari Iida
This patch fix spelling typo in printk. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2014-08-29backlight: omap1: add blank line after declarationsJingoo Han
Fixed the following checkpatch warning. WARNING: Missing a blank line after declarations Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-29backlight: jornada720: Remove 'else' after a returnJingoo Han
Fixed the following checkpatch warning. WARNING: else is not generally useful after a break or return Suggested-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-29backlight: jornada720: Remove 'else' after a returnJingoo Han
Fixed the following checkpatch warning. WARNING: else is not generally useful after a break or return Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-29backlight: wm831x_bl: Add blank line after declarationsJingoo Han
Fixed the following checkpatch warning. WARNING: Missing a blank line after declarations Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-29backlight: tdo24m: Add blank line after declarationsJingoo Han
Fixed the following checkpatch warning. WARNING: Missing a blank line after declarations Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-29backlight: s6e63m0: Remove 'else' after a returnJingoo Han
Fixed the following checkpatch warning. WARNING: else is not generally useful after a break or return Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-29backlight: pcf50633: Add blank line after declarationsJingoo Han
Fixed the following checkpatch warning. WARNING: Missing a blank line after declarations Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-29backlight: lp855x: Add blank line after declarationsJingoo Han
Fixed the following checkpatch warning. WARNING: Missing a blank line after declarations Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-29backlight: lms501kf03: Remove 'else' after a returnJingoo Han
Fixed the following checkpatch warning. WARNING: else is not generally useful after a break or return Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-29backlight: lm3639: Remove unnecessary return statementsJingoo Han
Fixed the following checkpatch warning. WARNING: void function return statements are not generally useful Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-29backlight: ld9040: Remove 'else' after a returnJingoo Han
Fixed the following checkpatch warning. WARNING: else is not generally useful after a break or return Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-29backlight: ili922x: Remove 'else' after a returnJingoo Han
Fixed the following checkpatch warning. WARNING: else is not generally useful after a break or return Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-29backlight: cr_bllcd: Add blank line after declarationsJingoo Han
Fixed the following checkpatch warning. WARNING: Missing a blank line after declarations Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-29backlight: corgi_lcd: Add blank line after declarationsJingoo Han
Fixed the following checkpatch warning. WARNING: Missing a blank line after declarations Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-29backlight: ams369fg06: Remove 'else' after a returnJingoo Han
Fixed the following checkpatch warning. WARNING: else is not generally useful after a break or return Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-29backlight: adp8870: Add blank line after declarationsJingoo Han
Fixed the following checkpatch warning. WARNING: Missing a blank line after declarations Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-29backlight: adp8860: Add blank line after declarationsJingoo Han
Fixed the following checkpatch warning. WARNING: Missing a blank line after declarations Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-29backlight: adp5520: Add blank line after declarationsJingoo Han
Fixed the following checkpatch warning. WARNING: Missing a blank line after declarations Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-28backlight: generic_bl: Remove unused functionFabio Estevam
genericbl_limit_intensity() is exported, but it is never called anywhere else. Fix the following sparse warning: drivers/video/backlight/generic_bl.c:59:6: warning: symbol 'genericbl_limit_intensity' was not declared. Should it be static? Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-28backlight: Remove .owner field for drivers using module_platform_driverPeter Griffin
This patch removes the superflous .owner field for drivers which use the module_platform_driver or platform_driver_register api, as this is overriden in __platform_driver_register. Signed-off-by: Peter Griffin <peter.griffin@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-20pwm-backlight: Fix bogus request for GPIO#0 when instantiated from DTLothar Waßmann
commit 257462dbf3ed ("pwm-backlight: switch to gpiod interface") introduced a regression leading to acquiring a bogus GPIO-0 when configured from DT without an 'enable-gpios' property. The driver will happily accept the 0 initialized 'enable_gpio' member of the struct platform_pwm_backlight_data as valid gpio number, and request this GPIO as enable pin. In case of multiple driver instances, the second will fail to register with the error message: pwm-backlight backlight1.23: failed to request GPIO#0: -16 Fix this by setting enable_gpio in the pdata struct to -EINVAL. Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-08Merge tag 'drivers-for-3.17' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC driver changes from Olof Johansson: "A handful of driver-related changes. We've had a bunch of them going in through other branches as well, so it's only a part of what we really have this release. Larger pieces are: - Removal of a now unused PWM driver for atmel [ This includes AVR32 changes that have been appropriately acked ] - Performance counter support for the arm CCN interconnect - OMAP mailbox driver cleanups and consolidation - PCI and SATA PHY drivers for SPEAr 13xx platforms - Redefinition (with backwards compatibility!) of PCI DT bindings for Tegra to better model regulators/power" Note: this merge also fixes up the semantic conflict with the new calling convention for devm_phy_create(), see commit f0ed817638b5 ("phy: core: Let node ptr of PHY point to PHY and not of PHY provider") that came in through Greg's USB tree. Semantic merge patch by Stephen Rothwell <sfr@canb.auug.org.au> through the next tree. * tag 'drivers-for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (38 commits) bus: arm-ccn: Fix error handling at event allocation mailbox/omap: add a parent structure for every IP instance mailbox/omap: remove the private mailbox structure mailbox/omap: consolidate OMAP mailbox driver mailbox/omap: simplify the fifo assignment by using macros mailbox/omap: remove omap_mbox_type_t from mailbox ops mailbox/omap: remove OMAP1 mailbox driver mailbox/omap: use devm_* interfaces bus: ARM CCN: add PERF_EVENTS dependency bus: ARM CCN PMU driver PCI: spear: Remove spear13xx_pcie_remove() PCI: spear: Fix Section mismatch compilation warning for probe() ARM: tegra: Remove legacy PCIe power supply properties PCI: tegra: Remove deprecated power supply properties PCI: tegra: Implement accurate power supply scheme ARM: SPEAr13xx: Update defconfigs ARM: SPEAr13xx: Add pcie and miphy DT nodes ARM: SPEAr13xx: Add bindings and dt node for misc block ARM: SPEAr13xx: Fix static mapping table phy: Add drivers for PCIe and SATA phy on SPEAr13xx ...
2014-07-31backlight: ipaq_micro: Fix sparse non static symbol warningWei Yongjun
Fixes the following sparse warnings: drivers/video/backlight/ipaq_micro_bl.c:73:24: warning: symbol 'micro_backlight_device_driver' was not declared. Should it be static? Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Acked-by: Bryan Wu <cooloney@gmail.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-07-25backlight: Add driver for iPAQ micro backlightLinus Walleij
This adds a driver for the backlight controlled by the microcontroller on the Compaq iPAQ series of handheld computers: h3100, h3600 and h3700. Acked-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-07-18backlight: pwm-backlight: Use devm_gpiod_get_optional()Alexandre Courbot
Make use of the new devm_gpiod_get_optional() to simplify the probe code. Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-07-18backlight: jornada720: Minimise code duplication and handle errors betterLee Jones
Rickard Strandqvi's ran a code analysis application which found that jornada_lcd_get_contrast(() and jornada_lcd_set_contrast() contained some code duplication (calling the same functions during various code execution paths) and failed to return errors in a consistent manner. This patch aims to simplify the code, coercing it into behaving at a level expected of a driver in the Linux kernel. Suggested-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> Acked-by: Jingoo Han <jg1.han@samsung.com> Reviewed-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-07-09backlight: atmel-pwm-bl: remove obsolete driverAlexandre Belloni
The atmel-pwm-bl driver is now obsolete. It is not used by any mainlined boards and is replaced by the generic pwm_bl with the pawm-atmel driver using the generic PWM framework. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no> Acked-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-06-23backlight: Show brightness even if get_brightness is not implementedAndrzej Hajda
Many implementations of get_brightness operation returns only value of props.brightness field. This change makes such implementations unnecessary. Acked-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-06-23backlight: Remove trivial get_brightness implementationsAndrzej Hajda
Since backlight core returns props.brightness in case get_brightness is not implemented trivial implementations are not needed anymore. Acked-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-06-12Merge tag 'backlight-for-linus-3.16' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight Pull backlight fixes from Lee Jones: "This merely contains some very basic build/run-time bug fixes" * tag 'backlight-for-linus-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight: backlight: gpio-backlight: Fix warning when the GPIO is on a I2C chip video/backlight: s6e63m0: Fix string type mismatch video/backlight: LP8788 needs PWM video/backlight: LP855X needs PWM video/pxa: LCD_CORGI needs BACKLIGHT_CLASS_DEVICE video/backlight: LM3630A needs PWM
2014-06-11Merge tag 'pwm/for-3.16-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm Pull pwm changes from Thierry Reding: "The majority of these changes are cleanups and fixes across all drivers. Redundant error messages are removed and more PWM controllers set the .can_sleep flag to signal that they can't be used in atomic context. Support is added for the Broadcom Kona family of SoCs and the Intel LPSS driver can now probe PCI devices in addition to ACPI devices. Upon shutdown, the pwm-backlight driver will now power off the backlight. It also uses the new descriptor-based GPIO API for more concise GPIO handling. A large chunk of these changes also converts platforms to use the lookup mechanism rather than relying on the global number space to reference PWM devices. This is largely in preparation for more unification and cleanups in future patches. Eventually it will allow the legacy PWM API to be removed" * tag 'pwm/for-3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (38 commits) pwm: fsl-ftm: set pwm_chip can_sleep flag pwm: ab8500: Fix wrong value shift for disable/enable PWM pwm: samsung: do not set manual update bit in pwm_samsung_config pwm: lp3943: Set pwm_chip can_sleep flag pwm: atmel: set pwm_chip can_sleep flag pwm: mxs: set pwm_chip can_sleep flag pwm: tiehrpwm: inline accessor functions pwm: tiehrpwm: don't build PM related functions when not needed pwm-backlight: retrieve configured PWM period leds: leds-pwm: retrieve configured PWM period ARM: pxa: hx4700: use PWM_LOOKUP to initialize struct pwm_lookup ARM: shmobile: armadillo: use PWM_LOOKUP to initialize struct pwm_lookup ARM: OMAP3: Beagle: use PWM_LOOKUP to initialize struct pwm_lookup pwm: modify PWM_LOOKUP to initialize all struct pwm_lookup members ARM: pxa: hx4700: initialize all the struct pwm_lookup members ARM: OMAP3: Beagle: initialize all the struct pwm_lookup members pwm: renesas-tpu: remove unused struct tpu_pwm_platform_data ARM: shmobile: armadillo: initialize all struct pwm_lookup members pwm: add period and polarity to struct pwm_lookup pwm: twl: Really disable twl6030 PWMs ...
2014-06-05backlight: gpio-backlight: Fix warning when the GPIO is on a I2C chipTony Lindgren
If the GPIO for the backlight is on an I2C chip, we currently get nasty warnings like this during the boot: WARNING: CPU: 0 PID: 6 at drivers/gpio/gpiolib.c:2364 gpiod_set_raw_value+0x40/0x4c() Modules linked in: CPU: 0 PID: 6 Comm: kworker/u2:0 Not tainted 3.15.0-rc4-12393-gcde9f4e #400 Workqueue: deferwq deferred_probe_work_func [<c0014cbc>] (unwind_backtrace) from [<c001191c>] (show_stack+0x10/0x14) [<c001191c>] (show_stack) from [<c0566ae0>] (dump_stack+0x80/0x9c) [<c0566ae0>] (dump_stack) from [<c003f61c>] (warn_slowpath_common+0x68/0x8c) [<c003f61c>] (warn_slowpath_common) from [<c003f65c>] (warn_slowpath_null+0x1c/0x24) [<c003f65c>] (warn_slowpath_null) from [<c02f7e10>] (gpiod_set_raw_value+0x40/0x4c) [<c02f7e10>] (gpiod_set_raw_value) from [<c0308fbc>] (gpio_backlight_update_status+0x4c/0x74) [<c0308fbc>] (gpio_backlight_update_status) from [<c030914c>] (gpio_backlight_probe+0x168/0x254) [<c030914c>] (gpio_backlight_probe) from [<c0378fa8>] (platform_drv_probe+0x18/0x48) [<c0378fa8>] (platform_drv_probe) from [<c0377c40>] (driver_probe_device+0x10c/0x238) [<c0377c40>] (driver_probe_device) from [<c0376330>] (bus_for_each_drv+0x44/0x8c) [<c0376330>] (bus_for_each_drv) from [<c0377afc>] (device_attach+0x74/0x8c) [<c0377afc>] (device_attach) from [<c03771c4>] (bus_probe_device+0x88/0xb0) [<c03771c4>] (bus_probe_device) from [<c03775c8>] (deferred_probe_work_func+0x64/0x94) [<c03775c8>] (deferred_probe_work_func) from [<c00572e8>] (process_one_work+0x1b4/0x4bc) [<c00572e8>] (process_one_work) from [<c00579d0>] (worker_thread+0x11c/0x398) [<c00579d0>] (worker_thread) from [<c005dfd8>] (kthread+0xc8/0xe4) [<c005dfd8>] (kthread) from [<c000e768>] (ret_from_fork+0x14/0x2c) Fix this by using gpio_set_value_cansleep() as suggested in drivers/gpio/gpiolib.c:2364. This is what the other backlight drivers are also doing. Signed-off-by: Tony Lindgren <tony@atomide.com> Acked-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-05-27backlight: Add backlight device (un)registration notificationHans de Goede
Some firmware drivers, ie acpi-video want to get themselves out of the way (in some cases) when their also is a raw backlight device available. Due to module loading ordering being unknown, acpi-video cannot be certain that the backlight_device_registered(BACKLIGHT_RAW) it does for this is the final verdict wrt there being a BACKLIGHT_RAW device. By adding notification acpi-video can listen for backlight devices showing up after it has loaded, and unregister its backlight device if desired. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-05-21pwm-backlight: retrieve configured PWM periodAlexandre Belloni
The PWM core is now able to initialize the PWM period from a lookup table defined by board files. Use it if available and fallback to the value supplied in pwm_period_ns. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2014-05-07video/backlight: s6e63m0: Fix string type mismatchMasanari Iida
Fix string type mismatch in s6e63m0_sysfs_show_gamma_table(). gamma_table_count is defined as unsigned int. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Acked-by: Bryan Wu <cooloney@gmail.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-05-07pwm-backlight: switch to gpiod interfaceAlexandre Courbot
Switch to the new gpiod interface, which allows to handle GPIO properties such as active low transparently and removes a whole bunch of code. There are still a couple of users of this driver that rely on passing the enable GPIO number through platform data, so a fallback mechanism using a GPIO number is still available to avoid breaking them. It will be removed once current users have switched to the GPIO lookup tables provided by the gpiod interface. Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
2014-05-02pwm-backlight: Disable backlight on shutdownThierry Reding
When a device is shut down, make sure to disable the backlight. If it stays lit, it gives the impression that the device hasn't turned off. Furthermore keeping the backlight on may consume power, which is not what users expect when they shut down a device. Tested-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-04-28video/backlight: LP8788 needs PWMPeter Griffin
The LP8788 driver cannot be successfully built if we don't enable the PWM subsystem. This patch makes that dependency explicit in Kconfig and prevents broken randconfig builds. Based on Arnd Bergmann patch but split out into seperate commits per driver based on feedback. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Peter Griffin <peter.griffin@linaro.org> Acked-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Bryan Wu <cooloney@gmail.com> Acked-by: Milo Kim <milo.kim@ti.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-04-28video/backlight: LP855X needs PWMArnd Bergmann
The LP855X driver cannot be successfully built if we don't enable the PWM subsystem. This patch makes that dependency explicit in Kconfig and prevents broken randconfig builds. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Peter Griffin <peter.griffin@linaro.org> Acked-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Bryan Wu <cooloney@gmail.com> Acked-by: Milo Kim <milo.kim@ti.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-04-28video/pxa: LCD_CORGI needs BACKLIGHT_CLASS_DEVICEArnd Bergmann
This fixes a randconfig build error when BACKLIGHT_CLASS_DEVICE is disabled, by describing the dependency in Kconfig, as we do for the other drivers in this directory. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Peter Griffin <peter.griffin@linaro.org> Acked-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Bryan Wu <cooloney@gmail.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-04-28video/backlight: LM3630A needs PWMPeter Griffin
The LM3630A driver cannot be successfully built if we don't enable the PWM subsystem. This patch makes that dependency explicit in Kconfig and prevents broken randconfig builds. Based on Arnd Bergmann patch but split out into seperate commits per driver based on feedback. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Peter Griffin <peter.griffin@linaro.org> Acked-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Bryan Wu <cooloney@gmail.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-04-10Merge tag 'backlight-for-linus-3.15' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight Pull backlight changes from Lee Jones: - core: call put_device() instead of kfree() - gpio-backlight: add DT support - lm3639_bl driver: use managed resources * tag 'backlight-for-linus-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight: backlight: lm3639: Use devm_backlight_device_register() backlight: gpio-backlight: Add DT support backlight: core: Replace kfree with put_device