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authorVaibhav Jain <vaibhav@linux.vnet.ibm.com>2015-07-03 10:41:20 +0530
committerMichael Ellerman <mpe@ellerman.id.au>2015-08-18 19:34:41 +1000
commite0ad784b65a64a617179598addb417d49dd4e08f (patch)
treeee6cbb9dcb90754c6abd0ffa5d5f655a246cd194 /Documentation
parent1d805440a364b4a68562e70119d8f94456698e55 (diff)
downloadlinux-e0ad784b65a64a617179598addb417d49dd4e08f.tar.bz2
powerpc/pseries: enable RTC class support
A working rtc kernel driver is needed so that hwclock can synchronize system clock to rtc during shutdown/boot. We already have a powernv platform rtc driver located at drivers/rtc/rtc-opal.c. However it depends on CONFIG_RTC_CLASS which is disabled by default. Hence the driver isn't enabled and not compiled for the powernv kernel. We fix this by enabling rtc class support in pseries defconfig which enables this driver and compiles it into the pseries kernel. In case CONFIG_PPC_POWERNV is not enabled we fallback to 'Generic RTC support' driver which emulates the legacy 'PC RTC driver'. Signed-off-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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