On Mar 7, 2016 4:50 PM, "Ken Moffat" <[email protected]> wrote: > > On Mon, Mar 07, 2016 at 04:22:22PM -0700, Roger Koehler wrote: > > > You need to include the driver required for your rtc in the kernel config. > > > Clearly that is missing. > > > > > > Find out which driver your old kernel is using for the rtc driver. Clearly > > > a newer kernel version wouldn't mess up the rtc layout so much that a make > > > oldconfig wouldn't work from the previous kernel config. > > > > cat /sys/class/rtc/rtc0/dev > > 254:0 > > > > cat /sys/class/rtc/rtc0/name > > rtc_cmos > > > > Same for both. I really believe they changed the rtc driver code. > > I can vaguely remember that something changed in the rtc area in the > last couple of years, but there is nothing in my notes - I guess > that I just fixed up my .config, probably after noticing a change on > an -rc kernel. > > This is what I have on my SandyBridge, I suspect my other machines > are similar, so let's start with this: > > CONFIG_RTC_LIB=y > CONFIG_RTC_CLASS=y > CONFIG_RTC_HCTOSYS=y > CONFIG_RTC_HCTOSYS_DEVICE="rtc0" > CONFIG_RTC_SYSTOHC=y > CONFIG_RTC_SYSTOHC_DEVICE="rtc0" > > # CONFIG_RTC_DEBUG is not set > > # > # RTC interfaces > # > CONFIG_RTC_INTF_SYSFS=y > CONFIG_RTC_INTF_PROC=y > CONFIG_RTC_INTF_DEV=y > # CONFIG_RTC_INTF_DEV_UIE_EMUL is not set > # CONFIG_RTC_DRV_TEST is not set > > [ ... ] > > # > # Platform RTC drivers > # > CONFIG_RTC_DRV_CMOS=y > > Does any of that differ from what you have ?
Just SYSTOHC because I don't want the system to write over the rtc automatically.
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