From mboxrd@z Thu Jan 1 00:00:00 1970 From: thunder.leizhen@huawei.com (Leizhen (ThunderTown)) Date: Mon, 28 Sep 2015 16:41:19 +0800 Subject: [PATCH 2/2] arm64: to allow EFI_RTC can be selected on ARM64 In-Reply-To: References: <1443418478-8240-1-git-send-email-thunder.leizhen@huawei.com> <1443418478-8240-3-git-send-email-thunder.leizhen@huawei.com> Message-ID: <5608FD2F.1000105@huawei.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 2015/9/28 15:40, Ard Biesheuvel wrote: > On 28 September 2015 at 06:34, Zhen Lei wrote: >> Now, ARM64 is also support EFI startup. We hope use EFI runtime services >> to get/set current time and date. >> >> RTC_LIB only controls some configs in drivers/char/Kconfig(included >> EFI_RTC), and will be automatically selected when RTC_CLASS opened. So >> this patch have no functional change but give an opportunity to select >> EFI_RTC when RTC_CLASS closed. >> >> Signed-off-by: Zhen Lei >> --- >> arch/arm64/Kconfig | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig >> index 07d1811..25cec57 100644 >> --- a/arch/arm64/Kconfig >> +++ b/arch/arm64/Kconfig >> @@ -85,7 +85,7 @@ config ARM64 >> select PERF_USE_VMALLOC >> select POWER_RESET >> select POWER_SUPPLY >> - select RTC_LIB >> + select RTC_LIB if !EFI >> select SPARSE_IRQ >> select SYSCTL_EXCEPTION_TRACE >> select HAVE_CONTEXT_TRACKING > > You can currently enable EFI_RTC just fine on arm64 when EFI is enabled. > Why exactly do you need this patch on top? Because when we run "make ARCH=arm64 menuconfig", RTC_LIB is always selected. And we have no opportunity to deselect it. And EFI_RTC can be displayed only when RTC_LIB=n. --------drivers/rtc/Kconfig------- config RTC_LIB bool menuconfig RTC_CLASS bool "Real Time Clock" default n depends on !S390 && !UML select RTC_LIB --------------drivers/char/Kconfig-------------- if RTC_LIB=n ...... config EFI_RTC bool "EFI Real Time Clock Services" depends on IA64 || ARM64 ....... endif # RTC_LIB > > . >