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dt-bindings: leds: qcom-lpg: Explain standalone PWM usage

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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.

Signed-off-by: Fenglin Wu <fenglin.wu@oss.qualcomm.com>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Link: https://patch.msgid.link/20251119-lpg_triled_fix-v3-1-84b6dbdc774a@oss.qualcomm.com
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Fenglin Wu 2025-11-19 14:06:42 +08:00 • committed by Lee Jones
parent fc6a6da64f
commit 5d390e7a02
1 changed files with 5 additions and 0 deletions
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5
Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml
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@ -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: