From: Johan Hovold Date: Wed, 23 Apr 2025 07:51:42 +0000 (+0200) Subject: arm64: dts: qcom: sc8280xp-x13s: describe uefi rtc offset X-Git-Tag: v6.16-rc7~40^2~1^2~1 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=869971de8221b97acb6aa4d7ff4fa67eb71adc87;p=thirdparty%2Flinux.git arm64: dts: qcom: sc8280xp-x13s: describe uefi rtc offset 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. Fixes: 409803681a55 ("arm64: dts: qcom: sc8280xp-x13s: switch to uefi rtc offset") Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20250423075143.11157-4-johan+linaro@kernel.org Signed-off-by: Bjorn Andersson --- diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts b/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts index ae7a275fd2236..cefecb7a23cf5 100644 --- a/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts +++ b/arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts @@ -1090,6 +1090,8 @@ }; &pmk8280_rtc { + qcom,uefi-rtc-info; + status = "okay"; };