On Mon, Jan 20, 2025 at 03:10:24PM +0000, Sudeep Holla wrote: > On Mon, Jan 20, 2025 at 03:41:48PM +0100, Johan Hovold wrote: > > On many Qualcomm platforms the PMIC RTC control and time registers are > > read-only so that the RTC time can not be updated. Instead an offset > > needs be stored in some machine-specific non-volatile memory, which the > > driver can take into account. > > > > Add support for storing a 32-bit offset from the GPS time epoch in a > > UEFI variable so that the RTC time can be set on such platforms. > > > > Why can't the UEFI runtime services be used here ? > In short, why is drivers/rtc/rtc-efi.c not working or no attempts are > made to check if that works just fine ? As I alluded to in the commit message, the Qualcomm UEFI implementation is broken and the runtime services cannot be accessed during runtime... That's why we can't use rtc-efi and why we have a dedicated efivars implementation that talks directly to the firmware using a custom protocol: https://lore.kernel.org/all/20220723224949.1089973-1-luzmaximilian@xxxxxxxxx/ Johan
