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arm64: dts: qcom: sc8280xp-arcata: Switch to uefi rtc offset

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Align with the reference implementation from the ThinkPad X13s:

Switch to using the Qualcomm specific UEFI variable that is used by the
UEFI firmware (and Windows) to store the RTC offset.

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.

Cc: Johan Hovold <johan@kernel.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Jérôme de Bretagne <jerome.debretagne@gmail.com>
Link: https://lore.kernel.org/r/20260604-surface-sp9-5g-for-next-v3-9-6aa6f6612c10@gmail.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
This commit is contained in:
Jérôme de Bretagne 2026-06-04 18:18:45 +02:00 committed by Bjorn Andersson
parent e1cf7b2332
commit 1ba745a531
1 changed files with 1 additions and 10 deletions
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11
arch/arm64/boot/dts/qcom/sc8280xp-microsoft-arcata.dts
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@ -736,20 +736,11 @@ &pmk8280_pon_resin {
};
&pmk8280_rtc {
nvmem-cells = <&rtc_offset>;
nvmem-cell-names = "offset";
qcom,uefi-rtc-info;
status = "okay";
};
&pmk8280_sdam_6 {
status = "okay";
rtc_offset: rtc-offset@bc {
reg = <0xbc 0x4>;
};
};
&qup0 {
status = "okay";
};