Re: [PATCH] arm64: dts: qcom: sc8280xp-blackrock: switch to uefi rtc offset

[Konrad Dybcio]

On 5/1/26 11:11 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.
> 
> On platforms where the offset is stored in a Qualcomm specific UEFI
> variable the variables are also accessed in a non-standard way, which
> means that the OS cannot assume that the variable service is available
> by the time the RTC driver probes.
> 
> Use the new 'qcom,uefi-rtc-info' property to indicate that the offset is
> stored in a UEFI variable so that the OS can determine whether to wait
> for it to become available.
> 
> [1]: https://lore.kernel.org/r/20250423075143.11157-4-johan+linaro@xxxxxxxxxx
> 
> Fixes: 16a7fed11714 ("arm64: dts: qcom: sc8280xp-blackrock: dt definition for WDK2023")
> 
> Signed-off-by: Jens Glathe <jens.glathe@xxxxxxxxxxxxxxxxxxxxxx>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx>

Konrad