@@ -14,7 +14,7 @@ pmm8540a: pmic@0 {
#address-cells = <1>;
#size-cells = <0>;
- rtc@6000 {
+ pmm8540a_rtc: rtc@6000 {
compatible = "qcom,pm8941-rtc";
reg = <0x6000>, <0x6100>;
reg-names = "rtc", "alarm";
@@ -39,6 +39,15 @@ pmm8540c: pmic@4 {
#address-cells = <1>;
#size-cells = <0>;
+ pmm8540c_sdam_2: nvram@b110 {
+ compatible = "qcom,spmi-sdam";
+ reg = <0xb110>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0 0xb110 0xb0>;
+ status = "disabled";
+ };
+
pmm8540c_gpios: gpio@c000 {
compatible = "qcom,pm8150-gpio", "qcom,spmi-gpio";
reg = <0xc000>;
@@ -407,6 +407,21 @@ &pcie3a_phy {
status = "okay";
};
+&pmm8540a_rtc {
+ nvmem-cells = <&rtc_offset>;
+ nvmem-cell-names = "offset";
+
+ status = "okay";
+};
+
+&pmm8540c_sdam_2 {
+ status = "okay";
+
+ rtc_offset: rtc-offset@a0 {
+ reg = <0xa0 0x4>;
+ };
+};
+
&qup0 {
status = "okay";
};
SA8540P-ride is one of the Qualcomm platforms that does not have access to UEFI runtime services and on which the RTC registers are read-only, as described in: https://lore.kernel.org/all/20230202155448.6715-1-johan+linaro@kernel.org/ Reserve four bytes in one of the PMIC registers to hold the RTC offset the same way as it was done for sc8280xp-crd which has similar limitations: commit e67b45582c5e ("arm64: dts: qcom: sc8280xp-crd: enable rtc") On SA8540P-ride, the register bank SDAM6 of the first PMIC is not writable. Following recommendations provided during the review, use SDAM2 from the second PMIC at offset 0xa0 instead. Reviewed-by: Caleb Connolly <caleb.connolly@linaro.org> Signed-off-by: Eric Chanudet <echanude@redhat.com> --- Changes in v3: * Reserve rtc-offset@a0 in pmm8540c_sdam_2 instead of rtc-offset@ac in pmm8540a_sdam_7. * v2: https://lore.kernel.org/linux-arm-msm/20230718145105.3464105-1-echanude@redhat.com/ Changes in v2: * Default pmm8540a_sdam_7 status to "disabled" in sa8540p-pmics.dtsi. * v1: https://lore.kernel.org/linux-arm-msm/20230717182351.3389252-1-echanude@redhat.com/ arch/arm64/boot/dts/qcom/sa8540p-pmics.dtsi | 11 ++++++++++- arch/arm64/boot/dts/qcom/sa8540p-ride.dts | 15 +++++++++++++++ 2 files changed, 25 insertions(+), 1 deletion(-)