add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

 kernel/arch/powerpc/include/asm/smu.h
..
..
@@ -108,7 +108,7 @@
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  /*
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   * i2c commands
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   *
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-  * To issue an i2c command, first is to send a parameter block to the
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+  * To issue an i2c command, first is to send a parameter block to
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   * the SMU. This is a command of type 0x9a with 9 bytes of header
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   * eventually followed by data for a write:
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   *