>-----Original Message----- >From: Stoppa Igor (Nokia-D/Helsinki) >Sent: 15 August, 2008 13:11 >To: Hogander Jouni (Nokia-D/Tampere) >Cc: Kristo Tero (Nokia-D/Tampere); tony@xxxxxxxxxxx; >linux-omap@xxxxxxxxxxxxxxx >Subject: Re: getnstimeofday() and suspend > >On Fri, 2008-08-15 at 12:55 +0300, Högander Jouni wrote: > >> Using them both would also generate more complexity. What >would be the >> benefit in using them both? > >The RTC should be used during suspend since it's supposed to >keep track of time regardless of how long the duration of the >suspension is. > >The 32kHz alone is not a good generic solution since it >overflows after a couple of days. General problem seems to be that arch/arm has not defined read_persistent_clock() function. Attached patch tries to fix this problem by using a 32k counter hack. Probably something similar should be done which checks for overflows and uses RTC if available. -Tero
Attachment:
0001-Fixed-timekeeping-bug-during-suspend.patch
Description: 0001-Fixed-timekeeping-bug-during-suspend.patch
