linux-toradex.git/drivers/video/backlight/rt4831-backlight.c, branch v6.9-rc1 Linux kernel for Apalis and Colibri modules backlight: rt4831-backlight: Convert to platform remove callback returning void 2023-03-16T15:08:37+00:00 Uwe Kleine-König u.kleine-koenig@pengutronix.de 2023-03-08T07:39:44+00:00 20c111d2e18c7318a9f2ae815c84ea0a9218317e The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is (mostly) ignored and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new() which already returns void. Trivially convert this driver from always returning zero in the remove callback to the void returning variant. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Lee Jones <lee@kernel.org> Link: https://lore.kernel.org/r/20230308073945.2336302-13-u.kleine-koenig@pengutronix.de 
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230308073945.2336302-13-u.kleine-koenig@pengutronix.de
backlight: rt4831: Apply ocp level from devicetree 2022-06-27T14:07:47+00:00 ChiYuan Huang cy_huang@richtek.com 2022-06-21T10:36:28+00:00 8b0bce056351bb9abd06a09cffff1ff0d84ee580 Add 'richtek,bled-ocp-microamp' property parsing in device_property_init function. This value may configure prior to the kernel driver. If it's not specified in devicetree, keep the original setting. Else, use clamp to align the value in min/max range and also roundup to choose the best selector. Reported-by: Lucas Tsai <lucas_tsai@richtek.com> Signed-off-by: ChiYuan Huang <cy_huang@richtek.com> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> Link: https://lore.kernel.org/r/1655807788-24511-3-git-send-email-u0084500@gmail.com 
Add 'richtek,bled-ocp-microamp' property parsing in
device_property_init function.

This value may configure prior to the kernel driver. If it's not specified in
devicetree, keep the original setting. Else, use clamp to align the
value in min/max range and also roundup to choose the best selector.

Reported-by: Lucas Tsai <lucas_tsai@richtek.com>
Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/1655807788-24511-3-git-send-email-u0084500@gmail.com
backlight: rt4831: Adds support for Richtek RT4831 backlight 2021-05-19T14:52:25+00:00 ChiYuan Huang cy_huang@richtek.com 2021-05-17T14:36:01+00:00 190ccab3185eee564c08ec96d9bbf4aff9b764f4 Adds support for Richtek RT4831 backlight. Signed-off-by: ChiYuan Huang <cy_huang@richtek.com> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org> 
Adds support for Richtek RT4831 backlight.

Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>