linux-kernel - [PATCH] arm64: dts: qcom: msm8996: Reduce vdd

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Date:   Tue, 17 Mar 2020 22:44:42 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Loic Poulain <loic.poulain@...aro.org>
Cc:     Rob Herring <robh+dt@...nel.org>, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] arm64: dts: qcom: msm8996: Reduce vdd_apc voltage

Some msm8996 based devices are unstable when run with VDD_APC of 1.23V,
which is listed as the maximum voltage in "Turbo" mode. Given that the
CPU cluster is not run in "Turbo" mode, reduce this to 0.98V - the
maximum voltage for nominal operation.

Fixes: 7a2a2231ef22 ("arm64: dts: apq8096-db820c: Fix VDD core voltage")
Cc: Loic Poulain <loic.poulain@...aro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
---
 arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi b/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
index af87350b5547..4692b7ad16b7 100644
--- a/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
+++ b/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
@@ -658,8 +658,8 @@ s10 {
 	s11 {
 		qcom,saw-leader;
 		regulator-always-on;
-		regulator-min-microvolt = <1230000>;
-		regulator-max-microvolt = <1230000>;
+		regulator-min-microvolt = <980000>;
+		regulator-max-microvolt = <980000>;
 	};
 };
 
-- 
2.24.0