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x86: cpu: add docstring to scu_ipc_command()
These comments were copied from the Linux kernel driver in drivers/platform/x86/intel_scu_ipc.c Signed-off-by: Georgii Staroselskii <georgii.staroselskii@emlid.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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@ -180,6 +180,17 @@ int scu_ipc_simple_command(u32 cmd, u32 sub)
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return scu_ipc_check_status(scu->regs);
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}
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/**
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* scu_ipc_command - command with data
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* @cmd: command
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* @sub: sub type
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* @in: input data
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* @inlen: input length in dwords
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* @out: output data
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* @outlen: output length in dwords
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*
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* Issue a command to the SCU which involves data transfers.
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*/
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int scu_ipc_command(u32 cmd, u32 sub, u32 *in, int inlen, u32 *out, int outlen)
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{
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struct scu *scu;
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