On 22.01.2025 7:41 AM, Jens Glathe via B4 Relay wrote: > From: Jens Glathe <jens.glathe@xxxxxxxxxxxxxxxxxxxxxx> > > 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 a > driver can take into account. > > Switch to using the Qualcomm specific UEFI variable that is used by the > UEFI firmware (and Windows) to store the RTC offset. > > This specifically means that the RTC time will be synchronised between > the UEFI firmware setup (or UEFI shell), Windows and Linux. > > Note however that Windows stores the RTC time in local time by default, > while Linux typically uses UTC (i.e. as on X86). > > Based on a patch by Johan Hovold. [1] > > Link: https://lore.kernel.org/all/20250120144152.11949-7-johan+linaro@xxxxxxxxxx/ # [1] > Signed-off-by: Jens Glathe <jens.glathe@xxxxxxxxxxxxxxxxxxxxxx> > --- Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx> Konrad
