arm64: dts: apq8096-db820c: Fix VDD core voltage (7a2a2231) · Commits · 戴 / test

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-bench). 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@linaro.org> Link: https://lore.kernel.org/r/1578401755-26211-1-git-send-email-loic.poulain@linaro.org Signed-off-by:

Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi

+16 −0

Original line number	Diff line number	Diff line
		@@ -647,6 +647,22 @@
		"NC";
		};

		&pm8994_spmi_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>;
		};
		};

		&pmi8994_gpios {
		gpio-line-names =
		"NC",

arch/arm64/boot/dts/qcom/msm8996.dtsi

+5 −0

Original line number	Diff line number	Diff line
		@@ -2137,6 +2137,11 @@
		};
		};

		saw3: syscon@9a10000 {
		compatible = "syscon";
		reg = <0x09a10000 0x1000>;
		};

		intc: interrupt-controller@9bc0000 {
		compatible = "qcom,msm8996-gic-v3", "arm,gic-v3";
		#interrupt-cells = <3>;

arch/arm64/boot/dts/qcom/pm8994.dtsi

+4 −0

Original line number	Diff line number	Diff line
		@@ -85,5 +85,9 @@
		reg = <0x1 SPMI_USID>;
		#address-cells = <1>;
		#size-cells = <0>;

		pm8994_spmi_regulators: regulators {
		compatible = "qcom,pm8994-regulators";
		};
		};
		};

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