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* leds: core: Fix warning message when init_dataRicardo Ribalda Delgado2020-04-061-1/+1
| | | | | | | | | | | | The warning message when a led is renamed due to name collition can fail to show proper original name if init_data is used. Eg: [ 9.073996] leds-gpio a0040000.leds_0: Led (null) renamed to red_led_1 due to name collision Fixes: bb4e9af0348d ("leds: core: Add support for composing LED class device names") Signed-off-by: Ricardo Ribalda Delgado <ribalda@kernel.org> Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: sort Makefile entriesPavel Machek2020-04-061-50/+50
| | | | | | Sort Makefile entries to reduce risk of rejects. Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: ip30: label power LED as suchPavel Machek2020-04-061-1/+1
| | | | | | Make label "white:power" to be consistent with dt-bindings/leds/common.h . Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: lm3532: make bitfield 'enabled' unsignedColin Ian King2020-04-061-1/+1
| | | | | | | The bitfield 'enabled' should bit unsigned, so make it unsigned. Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: leds-pwm: Replace zero-length array with flexible-array memberGustavo A. R. Silva2020-03-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current codebase makes use of the zero-length array language extension to the C90 standard, but the preferred mechanism to declare variable-length types such as these ones is a flexible array member[1][2], introduced in C99: struct foo { int stuff; struct boo array[]; }; By making use of the mechanism above, we will get a compiler warning in case the flexible array does not occur last in the structure, which will help us prevent some kind of undefined behavior bugs from being inadvertently introduced[3] to the codebase from now on. Also, notice that, dynamic memory allocations won't be affected by this change: "Flexible array members have incomplete type, and so the sizeof operator may not be applied. As a quirk of the original implementation of zero-length arrays, sizeof evaluates to zero."[1] This issue was found with the help of Coccinelle. [1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html [2] https://github.com/KSPP/linux/issues/21 [3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour") Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: leds-is31fl32xx: Replace zero-length array with flexible-array memberGustavo A. R. Silva2020-03-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current codebase makes use of the zero-length array language extension to the C90 standard, but the preferred mechanism to declare variable-length types such as these ones is a flexible array member[1][2], introduced in C99: struct foo { int stuff; struct boo array[]; }; By making use of the mechanism above, we will get a compiler warning in case the flexible array does not occur last in the structure, which will help us prevent some kind of undefined behavior bugs from being inadvertently introduced[3] to the codebase from now on. Also, notice that, dynamic memory allocations won't be affected by this change: "Flexible array members have incomplete type, and so the sizeof operator may not be applied. As a quirk of the original implementation of zero-length arrays, sizeof evaluates to zero."[1] This issue was found with the help of Coccinelle. [1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html [2] https://github.com/KSPP/linux/issues/21 [3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour") Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: pwm: remove useless pwm_period_nsDenis Osterland-Heim2020-03-211-4/+0
| | | | | | | | This member seems to was a way to pass PWM period to the LED. Since there is no header anymore, this is useless. Signed-off-by: Denis Osterland-Heim <Denis.Osterland@diehl.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: pwm: remove headerDenis Osterland-Heim2020-03-211-1/+13
| | | | | | | | | | | The header is only used by leds_pwm.c, so move contents to leds_pwm.c and remove it. Apply minor changes suggested by checkpatch. Remove deprecated and unused pwm_id member. Suggested-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Denis Osterland-Heim <Denis.Osterland@diehl.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: pwm: convert to atomic PWM APIUwe Kleine-König2020-02-261-32/+9
| | | | | | | | | | | | | | | | pwm_config(), pwm_enable() and pwm_disable() should get removed in the long run. So update the driver to use the atomic API that is here to stay. A few side effects: - led_pwm_set() now returns an error when setting the PWM fails. - During .probe() the PWM isn't disabled implicitly by pwm_apply_args() any more. Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org> Tested-by: Jeff LaBundy <jeff@labundy.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: pwm: simplify if conditionUwe Kleine-König2020-02-261-1/+1
| | | | | | | | | | .pwm_period_ns is an unsigned integer. So when led->pwm_period_ns > 0 is false, we now assign 0 to a value that is already 0, so it doesn't hurt and we can skip checking the actual value. Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org> Tested-by: Jeff LaBundy <jeff@labundy.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: add SGI IP30 led supportThomas Bogendoerfer2020-02-263-0/+98
| | | | | | | | | | This patch implemenets a driver to support the front panel LEDs of SGI Octane (IP30) workstations. Reviewed-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de> Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: lm3697: fix spelling mistake "To" -> "Too"Colin Ian King2020-02-261-1/+1
| | | | | | | There is a spelling mistake in a dev_err message. Fix it. Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: leds-bd2802: remove set but not used variable 'pdata'YueHaibing2020-02-261-2/+0
| | | | | | | | | | | | | | | Fixes gcc '-Wunused-but-set-variable' warning: drivers/leds/leds-bd2802.c: In function 'bd2802_probe': drivers/leds/leds-bd2802.c:663:35: warning: variable 'pdata' set but not used [-Wunused-but-set-variable] commit 4c3718f9d6a6 ("leds: bd2802: Convert to use GPIO descriptors") left behind this unused variable. Signed-off-by: YueHaibing <yuehaibing@huawei.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: ns2: Convert to GPIO descriptorsLinus Walleij2020-02-261-42/+31
| | | | | | | | | | | | | | | | This converts the NS2 LED driver to use GPIO descriptors. We take care to request the GPIOs "as is" which is what the current driver goes to lengths to achieve, then we use GPIOs throughout. As the nodes for each LED does not have any corresponding device, we need to use the DT-specific accessors to get these GPIO descriptors from the device tree. Cc: Vincent Donnefort <vdonnefort@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Simon Guinot <simon.guinot@sequanux.org> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: ns2: Absorb platform dataLinus Walleij2020-02-261-3/+27
| | | | | | | | | | | | | | | | | Nothing in the kernel includes the external header <linux/platform_data/leds-kirkwood-ns2.h> so just push the contents into the ns2 leds driver. If someone wants to use platform data or board files to describe this device they should be able to do so using GPIO machine descriptors but in any case device tree should be the way forward for these systems in all cases I can think of, and the driver already supports that. Cc: Simon Guinot <simon.guinot@sequanux.org> Cc: Vincent Donnefort <vdonnefort@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Simon Guinot <simon.guinot@sequanux.org> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: lm3692x: Disable chip on brightness 0Guido Günther2020-01-071-1/+17
| | | | | | | | Otherwise there's a noticeable glow even with brightness 0. Also turning off the regulator can save additional power. Signed-off-by: Guido Günther <agx@sigxcpu.org> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: lm3692x: Split out lm3692x_leds_disableGuido Günther2020-01-071-16/+26
| | | | | | | | | Move the relevant parts out of lm3692x_remove() and call it from there. No functional change. Signed-off-by: Guido Günther <agx@sigxcpu.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: lm3692x: Move lm3692x_init and rename to lm3692x_leds_enableGuido Günther2020-01-071-35/+35
| | | | | | | | | | This moves lm3692x_init so it can be used from lm3692x_brightness_set. Rename to lm3692_leds_enable to pair up with lm3692x_leds_disable. No functional change. Signed-off-by: Guido Günther <agx@sigxcpu.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: lm3692x: Make sure we don't exceed the maximum LED currentGuido Günther2020-01-071-1/+19
| | | | | | | | | | | | The current is given by the formular from page 12 of https://www.ti.com/lit/ds/symlink/lm36922.pdf. We use this to limit the led's max_brightness using the led-max-microamp DT property. The formula for the lm36923 is identical according to the data sheet. Signed-off-by: Guido Günther <agx@sigxcpu.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: lm3692x: Allow to configure over voltage protectionGuido Günther2020-01-061-4/+30
| | | | | | | | | Overvoltage protection is currently using the default of 29V. Make it configurable via DT. Signed-off-by: Guido Günther <agx@sigxcpu.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: populate the device's of_nodeJean-Jacques Hiblot2020-01-061-1/+3
| | | | | | | | | If initialization data is available and its fwnode is actually a of_node, store this information in the led device's structure. This will allow the device to use or provide OF-based API such (devm_xxx). Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: Add managed API to get a LED from a device driverJean-Jacques Hiblot2020-01-061-0/+49
| | | | | | | | | If the LED is acquired by a consumer device with devm_led_get(), it is automatically released when the device is detached. Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: Add of_led_get() and led_put()Tomi Valkeinen2020-01-061-0/+44
| | | | | | | | | | | | | This patch adds basic support for a kernel driver to get a LED device. This will be used by the led-backlight driver. Only OF version is implemented for now, and the behavior is similar to PWM's of_pwm_get() and pwm_put(). Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com> Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: lm3532: add pointer to documentation and fix typoPavel2020-01-061-1/+2
| | | | | | Add pointer to datasheet and fix typo in printk message. Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: lm3532: use extended registration so that LED can be used for backlightPavel2020-01-041-1/+7
| | | | Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: lm3642: remove warnings for bad strtol, cleanup gotosPavel Machek2020-01-021-23/+14
| | | | | | | | Bad string from userspace is not worth printing warning on; gotos that just directly return are not good, plus a comment fix. Cc: jacek.anaszewski@gmail.com, linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, dmurphy@ti.com Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: rb532: cleanup whitespacePavel Machek2020-01-021-1/+0
| | | | | | Trivial cleanup removing empty line at wrong place. Signed-off-by: Pavel Machek <pavel@ucw.cz>
* ledtrig-pattern: fix email address quoting in MODULE_AUTHOR()Pavel Machek2020-01-021-2/+2
| | | | | | | Apparently it is quite easy to forget ">" in quoting of email address. This fixes it. Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: tps6105x: add driver for MFD chip LED modeSven Van Asbroeck2019-12-213-0/+100
| | | | | | | | | This driver adds support for the LED operational mode of the tps6105x MFD device. Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com> Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* led: max77650: add of_match tableBartosz Golaszewski2019-12-211-0/+7
| | | | | | | | We need the of_match table if we want to use the compatible string in the pmic's child node and get the led driver loaded automatically. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: bd2802: Convert to use GPIO descriptorsLinus Walleij2019-12-211-9/+18
| | | | | | | | | | | | | | | | | The Rohm BD2802 have no in-kernel users so we can drop the GPIO number from the platform data and require users to provide the GPIO line using machine descriptors. As the descriptors come with inherent polarity inversion semantics, we invert the calls to set the GPIO line such that 0 means "unasserted" and 1 means "asserted". Put a note in the driver that machine descriptor tables will need to specify that the line is active low. Cc: Kim Kyuwon <chammoru@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: pca963x: Fix open-drain initializationZahari Petkov2019-12-211-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | Before commit bb29b9cccd95 ("leds: pca963x: Add bindings to invert polarity") Mode register 2 was initialized directly with either 0x01 or 0x05 for open-drain or totem pole (push-pull) configuration. Afterwards, MODE2 initialization started using bitwise operations on top of the default MODE2 register value (0x05). Using bitwise OR for setting OUTDRV with 0x01 and 0x05 does not produce correct results. When open-drain is used, instead of setting OUTDRV to 0, the driver keeps it as 1: Open-drain: 0x05 | 0x01 -> 0x05 (0b101 - incorrect) Totem pole: 0x05 | 0x05 -> 0x05 (0b101 - correct but still wrong) Now OUTDRV setting uses correct bitwise operations for initialization: Open-drain: 0x05 & ~0x04 -> 0x01 (0b001 - correct) Totem pole: 0x05 | 0x04 -> 0x05 (0b101 - correct) Additional MODE2 register definitions are introduced now as well. Fixes: bb29b9cccd95 ("leds: pca963x: Add bindings to invert polarity") Signed-off-by: Zahari Petkov <zahari@balena.io> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds-as3645a: Drop fwnode reference on ignored nodeSakari Ailus2019-12-211-1/+2
| | | | | | | | | | If a node is ignored, do not get a reference to it. Fix the bug by moving fwnode_handle_get() where a reference to an fwnode is saved for clarity. Reported-by: Andy Shevchenko <andriy.shevchenko@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
* leds: gpio: Fix uninitialized gpio label for fwnode based probeJacek Anaszewski2019-12-211-1/+9
| | | | | | | | | | | | | | | | | | | | | | When switching to using generic LED name composition mechanism via devm_led_classdev_register_ext() API the part of code initializing struct gpio_led's template name property was removed alongside. It was however overlooked that the property was also passed to devm_fwnode_get_gpiod_from_child() in place of "label" parameter, which when set to NULL, results in gpio label being initialized to '?'. It could be observed in debugfs and failed to properly identify gpio association with LED consumer. Fix this shortcoming by updating the GPIO label after the LED is registered and its final name is known. Fixes: d7235f5feaa0 ("leds: gpio: Use generic support for composing LED names") Cc: Russell King <linux@armlinux.org.uk> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com> [fixed comment] Signed-off-by: Pavel Machek <pavel@ucw.cz>
* Merge tag 'leds-5.5-rc1' of ↵Linus Torvalds2019-12-0216-138/+578
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds Pull LED updates from Pavel Machek: "This contains usual small updates to drivers, and removal of PAGE_SIZE limits on /sys/class/leds/<led>/trigger. We should not be really having that many triggers; but with cpu activity triggers we do, and we'll eventually need to fix it, but... remove the limit for now" * tag 'leds-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds: (26 commits) leds: trigger: netdev: fix handling on interface rename leds: an30259a: add a check for devm_regmap_init_i2c leds: mlxreg: Fix possible buffer overflow leds: pca953x: Use of_device_get_match_data() leds: core: Fix leds.h structure documentation leds: core: Fix devm_classdev_match to reference correct structure leds: core: Remove extern from header leds: lm3601x: Convert class registration to device managed leds: flash: Add devm_* functions to the flash class leds: flash: Remove extern from the header file leds: flash: Convert non extended registration to inline leds: Kconfig: Be consistent with the usage of "LED" leds: remove PAGE_SIZE limit of /sys/class/leds/<led>/trigger leds: tlc591xx: update the maximum brightness leds: lm3692x: Use flags from LM3692X_BRT_CTRL leds: lm3692x: Use flags from LM3692X_BOOST_CTRL leds: lm3692x: Handle failure to probe the regulator leds: lm3692x: Don't overwrite return value in error path leds: lm3692x: Print error value on dev_err leds: tlc591xx: use devm_led_classdev_register_ext() ...
| * leds: trigger: netdev: fix handling on interface renameMartin Schiller2019-11-031-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The NETDEV_CHANGENAME code is not "unneeded" like it is stated in commit 4cb6560514fa ("leds: trigger: netdev: fix refcnt leak on interface rename"). The event was accidentally misinterpreted equivalent to NETDEV_UNREGISTER, but should be equivalent to NETDEV_REGISTER. This was the case in the original code from the openwrt project. Otherwise, you are unable to set netdev led triggers for (non-existent) netdevices, which has to be renamed. This is the case, for example, for ppp interfaces in openwrt. Fixes: 06f502f57d0d ("leds: trigger: Introduce a NETDEV trigger") Fixes: 4cb6560514fa ("leds: trigger: netdev: fix refcnt leak on interface rename") Signed-off-by: Martin Schiller <ms@dev.tdt.de> Signed-off-by: Pavel Machek <pavel@ucw.cz>
| * leds: an30259a: add a check for devm_regmap_init_i2cChuhong Yuan2019-11-031-0/+7
| | | | | | | | | | | | | | | | | | an30259a_probe misses a check for devm_regmap_init_i2c and may cause problems. Add a check and print errors like other leds drivers. Signed-off-by: Chuhong Yuan <hslester96@gmail.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
| * leds: mlxreg: Fix possible buffer overflowOleh Kravchenko2019-11-031-2/+2
| | | | | | | | | | | | | | | | | | | | | | Error was detected by PVS-Studio: V512 A call of the 'sprintf' function will lead to overflow of the buffer 'led_data->led_cdev_name'. Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Oleh Kravchenko <oleg@kaa.org.ua> Signed-off-by: Pavel Machek <pavel@ucw.cz>
| * leds: pca953x: Use of_device_get_match_data()Stephen Boyd2019-11-031-12/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This driver can use the of_device_get_match_data() API to simplify the code. Replace calls to of_match_device() with this newer API under the assumption that where it is called will be when we know the device is backed by a DT node. This nicely avoids referencing the match table when it is undefined with configurations where CONFIG_OF=n. Cc: Arnd Bergmann <arnd@arndb.de> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Riku Voipio <riku.voipio@iki.fi> Cc: Rob Herring <robh+dt@kernel.org> Cc: Frank Rowand <frowand.list@gmail.com> Cc: Jacek Anaszewski <jacek.anaszewski@gmail.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Dan Murphy <dmurphy@ti.com> Cc: <linux-leds@vger.kernel.org> Signed-off-by: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Pavel Machek <pavel@ucw.cz>
| * leds: core: Fix devm_classdev_match to reference correct structureDan Murphy2019-11-031-1/+1
| | | | | | | | | | | | | | | | Fix the devm_classdev_match pointer initialization to the correct structure type. Signed-off-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
| * leds: lm3601x: Convert class registration to device managedDan Murphy2019-11-031-3/+1
| | | | | | | | | | | | | | | | Convert LED flash class registration to device managed class registration API. Signed-off-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
| * leds: flash: Add devm_* functions to the flash classDan Murphy2019-11-031-0/+50
| | | | | | | | | | | | | | | | Add the missing device managed API for registration and unregistration for the LED flash class. Signed-off-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
| * leds: Kconfig: Be consistent with the usage of "LED"Dan Murphy2019-11-031-2/+2
| | | | | | | | | | | | | | | | | | Update the Kconfig to be consistent in the case of using "LED" in the Kconfig. LED is an acronym and should be capitalized. Signed-off-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
| * leds: remove PAGE_SIZE limit of /sys/class/leds/<led>/triggerAkinobu Mita2019-11-033-26/+78
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reading /sys/class/leds/<led>/trigger returns all available LED triggers. However, the size of this file is limited to PAGE_SIZE because of the limitation for sysfs attribute. Enabling LED CPU trigger on systems with thousands of CPUs easily hits PAGE_SIZE limit, and makes it impossible to see all available LED triggers and which trigger is currently activated. We work around it here by converting /sys/class/leds/<led>/trigger to binary attribute, which is not limited by length. This is _not_ good design, do not copy it. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Pavel Machek <pavel@ucw.cz> Cc: Dan Murphy <dmurphy@ti.com>A Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Pavel Machek <pavel@ucw.cz>
| * leds: tlc591xx: update the maximum brightnessJean-Jacques Hiblot2019-11-031-3/+4
| | | | | | | | | | | | | | | | | | | | | | The TLC chips actually offer 257 levels: - 0: led OFF - 1-255: Led dimmed is using a PWM. The duty cycle range from 0.4% to 99.6% - 256: led fully ON Fixes: e370d010a5fe ("leds: tlc591xx: Driver for the TI 8/16 Channel i2c LED driver") Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
| * leds: lm3692x: Use flags from LM3692X_BRT_CTRLGuido Günther2019-11-031-1/+1
| | | | | | | | | | | | | | | | | | | | | | Use LM3692X_RAMP_EN instead of LM3692X_PWM_HYSTER_4LSB since the later is a flag for the PWM register. The actual register value remains unchanged. Signed-off-by: Guido Günther <agx@sigxcpu.org> Reviewed-by: Dan Murphy <dmurphy@ti.com> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Pavel Machek <pavel@ucw.cz>
| * leds: lm3692x: Use flags from LM3692X_BOOST_CTRLGuido Günther2019-11-031-3/+3
| | | | | | | | | | | | | | | | | | | | | | The current setup of LM3692X_BOOST_CTRL uses flags from LM3692X_BRT_CTRL. Use flags from LM3692X_BOOST_CTRL but leave the resulting register value unchanged. Signed-off-by: Guido Günther <agx@sigxcpu.org> Reviewed-by: Dan Murphy <dmurphy@ti.com> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Pavel Machek <pavel@ucw.cz>
| * leds: lm3692x: Handle failure to probe the regulatorGuido Günther2019-11-031-2/+11
| | | | | | | | | | | | | | | | | | | | Instead use devm_regulator_get_optional since the regulator is optional and check for errors. Signed-off-by: Guido Günther <agx@sigxcpu.org> Acked-by: Pavel Machek <pavel@ucw.cz> Reviewed-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
| * leds: lm3692x: Don't overwrite return value in error pathGuido Günther2019-11-031-4/+5
| | | | | | | | | | | | | | | | | | | | | | The driver currently reports successful initialization on every failure as long as it's able to power off the regulator. Don't check the return value of regulator_disable to avoid that. Signed-off-by: Guido Günther <agx@sigxcpu.org> Acked-by: Pavel Machek <pavel@ucw.cz> Reviewed-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
| * leds: lm3692x: Print error value on dev_errGuido Günther2019-11-031-7/+10
| | | | | | | | | | | | | | | | | | This gives a way better idea what is going on. Signed-off-by: Guido Günther <agx@sigxcpu.org> Reviewed-by: Dan Murphy <dmurphy@ti.com> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Pavel Machek <pavel@ucw.cz>
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