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2020-07-09rtc: add rtc commandRasmus Villemoes
Mostly as an aid for debugging RTC drivers, provide a command that can be used to read/write arbitrary registers (assuming the driver provides the read/write methods or their single-register-at-a-time variants). Reviewed-by: Simon Glass <[email protected]> Reviewed-by: Heiko Schocher <[email protected]> Signed-off-by: Rasmus Villemoes <[email protected]>