linux-kernel - [PATCH 5.6 174/194] arm64: dts: qcom: msm8996: Reduce vdd

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Message-Id: <20200518173546.124111884@linuxfoundation.org>
Date:   Mon, 18 May 2020 19:37:44 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Loic Poulain <loic.poulain@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Subject: [PATCH 5.6 174/194] arm64: dts: qcom: msm8996: Reduce vdd_apc voltage

From: Bjorn Andersson <bjorn.andersson@...aro.org>

commit 28810eecae08f9458a44831978e36f14ed182c80 upstream.

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.

Tested-by: Loic Poulain <loic.poulain@...aro.org>
Fixes: 7a2a2231ef22 ("arm64: dts: apq8096-db820c: Fix VDD core voltage")
Cc: Loic Poulain <loic.poulain@...aro.org>
Link: https://lore.kernel.org/r/20200318054442.3066726-1-bjorn.andersson@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
+++ b/arch/arm64/boot/dts/qcom/apq8096-db820c.dtsi
@@ -658,8 +658,8 @@
 	s11 {
 		qcom,saw-leader;
 		regulator-always-on;
-		regulator-min-microvolt = <1230000>;
-		regulator-max-microvolt = <1230000>;
+		regulator-min-microvolt = <980000>;
+		regulator-max-microvolt = <980000>;
 	};
 };