UEFI time services, GetTime(), SetTime(), GetWakeupTime(), SetWakeupTime() are also
supported by other non-IA64 architecutre with UEFI BIOS, e.g. x86.
This patch changed RTC_DRV_EFI configuration to depend on EFI but not just IA64. It
checks efi_enabled flag and efi-rtc driver should enabled.
Cc: Matt Fleming <matt.fleming@xxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Matthew Garrett <matthew.garrett@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jan Beulich <JBeulich@xxxxxxxx>
Signed-off-by: Lee, Chun-Yi <jlee@xxxxxxxx>
---
arch/x86/platform/efi/efi.c | 17 +++++++++++++++++
drivers/rtc/Kconfig | 2 +-
2 files changed, 18 insertions(+), 1 deletions(-)
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 7a7a692..42d6052 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -42,6 +42,7 @@
#include <linux/io.h>
#include <linux/reboot.h>
#include <linux/bcd.h>
+#include <linux/platform_device.h>
#include <asm/setup.h>
#include <asm/efi.h>
@@ -876,6 +877,22 @@ void __init efi_enter_virtual_mode(void)
0, NULL);
}
+static struct platform_device rtc_efi_dev = {
+ .name = "rtc-efi",
+ .id = -1,
+};
+
+static int __init rtc_init(void)
+{
+ if (efi_enabled(EFI_RUNTIME_SERVICES) &&
+ platform_device_register(&rtc_efi_dev) < 0)
+ pr_err("unable to register rtc-efi device...\n");
+
+ /* not necessarily an error */
+ return 0;
+}
+arch_initcall(rtc_init);
+
/*
* Convenience functions to obtain memory types and attributes
*/
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 349dbc4..bee13de 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -726,7 +726,7 @@ config RTC_DRV_DA9055
config RTC_DRV_EFI
tristate "EFI RTC"
- depends on IA64
+ depends on EFI
help
If you say yes here you will get support for the EFI
Real Time Clock.
--
1.6.4.2
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