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

Konrad Dybcio
2026-05-04T08:04:44Z

On 5/1/26 11:11 AM, Jens Glathe via B4 Relay wrote:
> From: Jens Glathe <jens.glathe@oldschoolsolutions.biz>
>
> 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@kernel.org
>
> Fixes: 16a7fed11714 ("arm64: dts: qcom: sc8280xp-blackrock: dt definition for WDK2023")
>
> Signed-off-by: Jens Glathe <jens.glathe@oldschoolsolutions.biz>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad