From: Mike Frysinger Date: Thu, 9 Sep 2010 23:37:29 +0000 (-0700) Subject: rtc-bfin: fix state restoration when resuming X-Git-Tag: v2.6.36-rc4~60 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b6de860651d5a9e56ba4f4e3edc1aa52ac2ac849;p=pandora-kernel.git rtc-bfin: fix state restoration when resuming Much (but not all) of the RTC state is kept in the RTC peripheral which has its own power domain. Periodically (1 HZ), that state is synced from one power domain to the other (peripheral->core). When we are resuming, we need to wait for the sync to occur so that we don't get a mismatch of reading undefined state in the rest of the driver. Further, once the externally maintained bits have been synced back into the core, we then need to restore the bits maintained in the core. In our particular case, that is just the write completion interrupt bit. If we don't do any of this, working with the RTC causes ~5 second delays from time to time after waking up due to the write completion interrupt never firing. Reported-by: Michael Dean Reported-by: Michael Hennerich Signed-off-by: Mike Frysinger Acked-by: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Reading git-diff-tree failed