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| author | Shanker Donthineni <sdonthineni@nvidia.com> | 2023-01-02 17:06:30 -0600 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2023-01-09 22:05:54 +0100 |
| commit | 101ca8d05913b7d1e6e8b9dd792193d4082fff86 (patch) | |
| tree | 5d3463367529e7f78a1d2e780af6f74502ab0d18 /include | |
| parent | 1b929c02afd37871d5afb9d498426f83432e71c2 (diff) | |
| download | linux-stable-101ca8d05913b7d1e6e8b9dd792193d4082fff86.tar.gz linux-stable-101ca8d05913b7d1e6e8b9dd792193d4082fff86.tar.bz2 linux-stable-101ca8d05913b7d1e6e8b9dd792193d4082fff86.zip | |
rtc: efi: Enable SET/GET WAKEUP services as optional
The current implementation of rtc-efi is expecting all the 4
time services GET{SET}_TIME{WAKEUP} must be supported by UEFI
firmware. As per the EFI_RT_PROPERTIES_TABLE, the platform
specific implementations can choose to enable selective time
services based on the RTC device capabilities.
This patch does the following changes to provide GET/SET RTC
services on platforms that do not support the WAKEUP feature.
1) Relax time services cap check when creating a platform device.
2) Clear RTC_FEATURE_ALARM bit in the absence of WAKEUP services.
3) Conditional alarm entries in '/proc/driver/rtc'.
Cc: <stable@vger.kernel.org> # v6.0+
Signed-off-by: Shanker Donthineni <sdonthineni@nvidia.com>
Link: https://lore.kernel.org/r/20230102230630.192911-1-sdonthineni@nvidia.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/efi.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/efi.h b/include/linux/efi.h index 4b27519143f5..98598bd1d2fa 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -668,7 +668,8 @@ extern struct efi { #define EFI_RT_SUPPORTED_ALL 0x3fff -#define EFI_RT_SUPPORTED_TIME_SERVICES 0x000f +#define EFI_RT_SUPPORTED_TIME_SERVICES 0x0003 +#define EFI_RT_SUPPORTED_WAKEUP_SERVICES 0x000c #define EFI_RT_SUPPORTED_VARIABLE_SERVICES 0x0070 extern struct mm_struct efi_mm; |