drivers/twserial: Add protocol driver for "three wire serial" interface.
This pretty unintelligent interface is used on some RTC chips.
Signed-off-by:
Detlev Zundel <dzu@denx.de>
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This pretty unintelligent interface is used on some RTC chips.
Signed-off-by:
Detlev Zundel <dzu@denx.de>