leds: pwm: Add optional GPIO enable pin support

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Add support for optional GPIO-based enable pin control to PWM LED driver.
Some PWM LED driver chips like TPS92380 and LT3743 require a separate
enable signal in addition to PWM control. Implement support for such
GPIO control through the "enable-gpios" device tree property, activating
the pin when LED brightness is non-zero and deactivating it when off.

Tested on i.MX8MP EVK with TPS92380 LED driver chip

Signed-off-by: LI Qingwu <Qing-wu.Li@leica-geosystems.com.cn>
Link: https://patch.msgid.link/20251117054511.730246-2-Qing-wu.Li@leica-geosystems.com.cn
Signed-off-by: Lee Jones <lee@kernel.org>

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LI Qingwu 2025-11-17 05:45:09 +00:00 • committed by Lee Jones

parent d7dca03a48

commit bb64206276

1 changed files with 19 additions and 0 deletions

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drivers/leds/leds-pwm.c

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