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2024-03-07backlight: hx8357: Fix potential NULL pointer dereferenceAndy Shevchenko1-4/+6
The "im" pins are optional. Add missing check in the hx8357_probe(). Reported-by: Dan Carpenter <dan.carpenter@linaro.org> Closes: https://lore.kernel.org/r/642e1230-3358-4006-a17f-3f297897ae74@moroto.mountain Fixes: 7d84a63a39b7 ("backlight: hx8357: Convert to agnostic GPIO API") Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Link: https://lore.kernel.org/r/20240114143921.550736-1-andriy.shevchenko@linux.intel.com Signed-off-by: Lee Jones <lee@kernel.org>
2024-03-07leds: expresswire: Don't use "proxy" headersAndy Shevchenko2-1/+7
Update header inclusions to follow IWYU (Include What You Use) principle. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Duje Mihanović <duje.mihanovic@skole.hr> Link: https://lore.kernel.org/r/20240223203010.881065-1-andriy.shevchenko@linux.intel.com Signed-off-by: Lee Jones <lee@kernel.org>
2024-03-07leds: ktd2692: Add GPIOLIB dependencyArnd Bergmann1-0/+1
The expresswire module requires gpiolib, so anything selecting it also needs this dependency: WARNING: unmet direct dependencies detected for LEDS_EXPRESSWIRE Depends on [n]: NEW_LEDS [=y] && GPIOLIB [=n] Selected by [y]: - LEDS_KTD2692 [=y] && NEW_LEDS [=y] && LEDS_CLASS_FLASH [=y] && OF [=y] Fixes: e59a15af7aa6 ("leds: ktd2692: Convert to use ExpressWire library") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Link: https://lore.kernel.org/r/20240213165602.2230970-1-arnd@kernel.org Signed-off-by: Lee Jones <lee@kernel.org>
2024-03-07backlight: ktd2801: Make timing struct staticDuje Mihanović1-1/+1
The struct containing the KTD2801 timing can be made static as it's not referenced outside the KTD2801 driver. Do this to prevent sparse complaints. Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202402100625.M0RkJhMh-lkp@intel.com/ Signed-off-by: Duje Mihanović <duje.mihanovic@skole.hr> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Link: https://lore.kernel.org/r/20240210-ktd2801-static-v1-1-90ad2e2e8483@skole.hr Signed-off-by: Lee Jones <lee@kernel.org>
2024-03-07backlight: Add Kinetic KTD2801 Backlight supportDuje Mihanović4-0/+142
KTD2801 is a LED backlight driver IC found in samsung,coreprimevelte. The brightness can be set using PWM or the ExpressWire protocol. Add support for the KTD2801. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Duje Mihanović <duje.mihanovic@skole.hr> Link: https://lore.kernel.org/r/20240125-ktd2801-v5-4-e22da232a825@skole.hr Signed-off-by: Lee Jones <lee@kernel.org>