[PATCH V6 1/2] dt-bindings: leds: pwm: add enable-gpios property
From: LI Qingwu <hidden>
Date: 2025-07-07 02:08:05
Also in:
linux-leds, lkml
Subsystem:
led subsystem, open firmware and flattened device tree bindings, the rest · Maintainers:
Lee Jones, Pavel Machek, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Some PWM LED driver chips like TPS92380 and LT3743 require a separate enable signal in addition to PWM control. Add this property to allow device trees to specify such GPIO, which will be controlled automatically by the driver based on the LED brightness state. Link: https://www.ti.com/lit/gpn/tps92380 Link: https://www.analog.com/media/en/technical-documentation/data-sheets/3743fe.pdf Reviewed-by: Krzysztof Kozlowski <redacted> Signed-off-by: LI Qingwu <redacted> --- Documentation/devicetree/bindings/leds/leds-pwm.yaml | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/leds/leds-pwm.yaml b/Documentation/devicetree/bindings/leds/leds-pwm.yaml
index 61b97e8bc36d0..6c4fcefbe25f9 100644
--- a/Documentation/devicetree/bindings/leds/leds-pwm.yaml
+++ b/Documentation/devicetree/bindings/leds/leds-pwm.yaml@@ -40,6 +40,13 @@ patternProperties: initialization. If the option is not set then max brightness is used. $ref: /schemas/types.yaml#/definitions/uint32 + enable-gpios: + description: + GPIO for LED hardware enable control. Set active when brightness is + non-zero and inactive when brightness is zero. + The GPIO default state follows the "default-state" property. + maxItems: 1 + required: - pwms - max-brightness
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2.43.0