修改led为gpio

hc

2024-10-12 a5969cabbb4660eab42b6ef0412cbbd1200cf14d

 kernel/Documentation/devicetree/bindings/serial/cdns,uart.txt
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@@ -12,6 +12,11 @@
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   See ../clocks/clock-bindings.txt for details.
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+Optional properties:
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+- cts-override : Override the CTS modem status signal. This signal will
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+  always be reported as active instead of being obtained from the modem status
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+  register. Define this if your serial port does not use this pin
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+
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 Example:
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 	uart@e0000000 {
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 		compatible = "cdns,uart-r1p8";