Re: [PATCH v3 1/2] dt-bindings: leds: qcom-lpg: Explain standalone PWM usage
From: Bjorn Andersson <andersson@kernel.org>
Date: 2025-11-19 21:46:58
Also in:
linux-arm-msm, linux-leds, lkml
On Wed, Nov 19, 2025 at 02:06:42PM +0800, Fenglin Wu via B4 Relay wrote:
From: Fenglin Wu <redacted> LPG channels can be used for only outputting PWM signals by routing to PMIC GPIOs without enabling TRILED. Explain this usage in the description for better clarity.
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
quoted hunk ↗ jump to hunk
Signed-off-by: Fenglin Wu <redacted> --- Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml | 5 +++++ 1 file changed, 5 insertions(+)diff --git a/Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml b/Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml index 841a0229c472a4764426d25d9dbb900adc20fc11..c4b7e57b251845a6970b34bc9ae0c00647b1bf96 100644 --- a/Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml +++ b/Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml@@ -13,6 +13,11 @@ description: > The Qualcomm Light Pulse Generator consists of three different hardware blocks; a ramp generator with lookup table (LUT), the light pulse generator and a three channel current sink. These blocks are found in a wide range of Qualcomm PMICs. + The light pulse generator (LPG) can also be used independently to output PWM + signal for standard PWM applications. In this scenario, the LPG output should + be routed to a specific PMIC GPIO by setting the GPIO pin mux to the special + functions indicated in the datasheet, the TRILED driver for the channel will + not be enabled in this configuration. properties: compatible:-- 2.34.1