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2024-06-26backlight: lm3509_bl: Fix early returns in for_each_child_of_node()Javier Carrasco1-2/+1
The for_each_child_of_node() macro automatically decrements the child refcount at the end of every iteration. On early exits, of_node_put() must be used to manually decrement the refcount and avoid memory leaks. The scoped version of the macro accounts for such early breaks, fixing the early exits without the need for explicit calls to of_node_put(). Reported-by: kernel test robot <lkp@intel.com> Reported-by: Julia Lawall <julia.lawall@inria.fr> Closes: https://lore.kernel.org/r/202406172314.2vVgelaS-lkp@intel.com/ Fixes: b72755f5b577 ("backlight: Add new lm3509 backlight driver") Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com> Link: https://lore.kernel.org/r/20240624-lm3509_bl_scoped-v1-1-ceba9df38f23@gmail.com Signed-off-by: Lee Jones <lee@kernel.org>
2024-06-20backlight: Drop explicit initialization of struct i2c_device_id::driver_data to 0Uwe Kleine-König8-9/+12
These drivers don't use the driver_data member of struct i2c_device_id, so don't explicitly initialize this member. This prepares putting driver_data in an anonymous union which requires either no initialization or named designators. But it's also a nice cleanup on its own. While add it, also remove commas after the sentinel entries. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com> Link: https://lore.kernel.org/r/20240619193558.2543645-2-u.kleine-koenig@baylibre.com Signed-off-by: Lee Jones <lee@kernel.org>
2024-06-13backlight: Add missing MODULE_DESCRIPTION() macrosJeff Johnson2-0/+2
With ARCH=x86, make allmodconfig && make W=1 C=1 reports: WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/video/backlight/platform_lcd.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/video/backlight/rt4831-backlight.o Add the missing invocations of the MODULE_DESCRIPTION() macro. Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com> Link: https://lore.kernel.org/r/20240612-md-drivers-video-backlight-v1-1-f4ca1beb36cc@quicinc.com Signed-off-by: Lee Jones <lee@kernel.org>
2024-06-13backlight: lm3509_bl: Fix NULL vs IS_ERR() check in register() functionDan Carpenter1-2/+3
The devm_backlight_device_register() doesn't return NULL, it returns error pointers. Update the error checking to match. Fixes: b72755f5b577 ("backlight: Add new lm3509 backlight driver") Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Link: https://lore.kernel.org/r/187b5bc5-a010-46c2-8ead-980df9efae79@moroto.mountain Signed-off-by: Lee Jones <lee@kernel.org>
2024-05-31backlight: Add new lm3509 backlight driverPatrick Gansterer3-0/+348
This is a general driver for LM3509 backlight chip of TI. LM3509 is High Efficiency Boost for White LEDs and/or OLED Displays with Dual Current Sinks. This driver supports OLED/White LED select, brightness control and sub/main control. The datasheet can be found at http://www.ti.com/product/lm3509. Signed-off-by: Patrick Gansterer <paroga@paroga.com> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Link: https://lore.kernel.org/r/20240526105136.721529-3-paroga@paroga.com Signed-off-by: Lee Jones <lee@kernel.org>