Re: [PATCH 2/2] arm64: to allow EFI_RTC can be selected on ARM64
From: Leizhen (ThunderTown)
Date: Mon Sep 28 2015 - 04:47:52 EST
On 2015/9/28 15:40, Ard Biesheuvel wrote:
> On 28 September 2015 at 06:34, Zhen Lei <thunder.leizhen@xxxxxxxxxx> 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 <thunder.leizhen@xxxxxxxxxx>
>> 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.
bool "Real Time Clock"
depends on !S390 && !UML
bool "EFI Real Time Clock Services"
depends on IA64 || ARM64
endif # RTC_LIB
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