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| author | Johan Hovold <johan+linaro@kernel.org> | 2025-04-23 10:51:42 +0300 |
|---|---|---|
| committer | Bjorn Andersson <andersson@kernel.org> | 2025-06-10 17:14:58 +0300 |
| commit | 869971de8221b97acb6aa4d7ff4fa67eb71adc87 (patch) | |
| tree | 4c2336e5b64ae79e8eca3ea8a12a6473faa75859 | |
| parent | 19272b37aa4f83ca52bdf9c16d5d81bdd1354494 (diff) | |
| download | linux-869971de8221b97acb6aa4d7ff4fa67eb71adc87.tar.xz | |
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 <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20250423075143.11157-4-johan+linaro@kernel.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
| -rw-r--r-- | arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts | 2 |
1 files changed, 2 insertions, 0 deletions
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 ae7a275fd223..cefecb7a23cf 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"; }; |