modify sin led gpio

hc

2024-05-13 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e

 kernel/Documentation/devicetree/bindings/pwm/pwm-lp3943.txt
..
..
@@ -2,7 +2,7 @@
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 Required properties:
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   - compatible: "ti,lp3943-pwm"
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-  - #pwm-cells: Should be 2. See pwm.txt in this directory for a
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+  - #pwm-cells: Should be 2. See pwm.yaml in this directory for a
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                 description of the cells format.
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                 Note that this hardware limits the period length to the
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                 range 6250~1600000.