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The KCS (Keyboard Controller Style) interface is used to perform in-band IPMI communication between a server host and its BMC (BaseBoard Management Controllers). This driver exposes the KCS interface on ASpeed SOCs (AST2400 and AST2500) as a character device. Such SOCs are commonly used as BMCs and this driver implements the BMC side of the KCS interface. Signed-off-by: Haiyue Wang <haiyue.wang@linux.intel.com> Signed-off-by: Corey Minyard <cminyard@mvista.com>