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authorMarshall Dawson <marshalldawson3rd@gmail.com>2016-11-05 18:31:33 -0600
committerMartin Roth <martinroth@google.com>2016-11-17 23:08:43 +0100
commit5a043fe08d84490356888d236ee7d190aa195217 (patch)
tree80b062db6bc068d06917afbbe0d3410b191b15d2 /src/mainboard/packardbell
parent05abe4351b1d76148a8cc69f817e659fa372a5dd (diff)
rtc: Check update-in-progress bit
While the real-time clock updates its count, values may not be correctly read or written. On reads, ensure the UIP bit is clear which guarantees a minimum of 244 microseconds exists before the update begins. Writes already avoid the problem by disabling the RTC count via the SET bit. Change-Id: I39e34493113015d32582f1c280fafa9e97f43a40 Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com> Reviewed-on: https://review.coreboot.org/17369 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
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