Re: [v3] powerpc/configs: enable RTC class support

On Mon, 2015-01-06 at 10:48:55 UTC, Vaibhav Jain wrote:

A working rtc kernel driver is needed so that hwclock can synchronize
system clock to rtc during shutdown/boot. We already have a rtc platform
driver for power arch located at drivers/rtc/rtc-opal.c However it
depends on CONFIG_RTC_CLASS which is disabled by default. So this driver
is not compiled with pseries defconfig as rtc class support is missing
from the kernel.

We fix this by enabling rtc class support in pseries defconfig so that
this driver gets enabled and is compiled into the pseries kernel.

So that seems fair enough.

But, it disables CONFIG_GEN_RTC. Which *I think* means we won't get an RTC
driver at all on pseries machines.

There's some history between those two options but I don't know it off the top
of my head. Ben should know?

cheers