APQ8096 has its VDD APC (Power for quad Kryo applications
microprocessors) powered by PM8996 PMIC S9, S10, S11 tri-phase
regulators (gang). The bootloader may have configured these
regulators with non sustainable default values, leading to sporadic
hangs under CPU stress tests (cpufreq-becnh). Ideally we should enable
voltage scaling along with frequency scaling, but for now just set the
regulator gang value to a sane voltage, capable of supporting highest
frequencies (turbo).
Signed-off-by: Loic Poulain <loic.poulain@xxxxxxxxxx>
---
arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi b/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
index dba3488..8cde693 100644
--- a/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
+++ b/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
@@ -493,6 +493,11 @@
core-vcc-supply = <&pm8994_s4>;
};
};
+
+ saw3: syscon@9A10000 {
+ compatible = "syscon";
+ reg = <0x9A10000 0x1000>;
+ };
};
@@ -681,6 +686,25 @@
};
};
};
+
+ pmic@1 {
+ spm-regulators {
+ compatible = "qcom,pm8994-regulators";
+ qcom,saw-reg = <&saw3>;
+ s9 {
+ qcom,saw-slave;
+ };
+ s10 {
+ qcom,saw-slave;
+ };
+ s11 {
+ qcom,saw-leader;
+ regulator-always-on;
+ regulator-min-microvolt = <1230000>;
+ regulator-max-microvolt = <1230000>;
+ };
+ };
+ };
};
&sound {
--
2.7.4
