add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

 kernel/Documentation/ABI/stable/sysfs-devices
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@@ -1,5 +1,6 @@
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-# Note: This documents additional properties of any device beyond what
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-# is documented in Documentation/admin-guide/sysfs-rules.rst
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+Note:
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+  This documents additional properties of any device beyond what
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+  is documented in Documentation/admin-guide/sysfs-rules.rst
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 What:		/sys/devices/*/of_node
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 Date:		February 2015