add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

 kernel/Documentation/devicetree/bindings/regulator/twl-regulator.txt
..
..
@@ -71,3 +71,10 @@
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 		regulator-min-microvolt  = <1000000>;
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 		regulator-max-microvolt  = <3000000>;
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 	};
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+
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+For twl6030 regulators/LDOs:
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+
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+ - ti,retain-on-reset: Does not turn off the supplies during warm
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+                       reset. Could be needed for VMMC, as TWL6030
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+                       reset sequence for this signal does not comply
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+                       with the SD specification.