linux-kernel - [PATCH v2 1/2] arm64: dts: imx8mq-librem5-devkit: Use 0.9V for VDD

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Date:   Tue, 21 Apr 2020 16:44:13 +0200
From:   Guido Günther <agx@...xcpu.org>
To:     "Rob Herring" <robh+dt@...nel.org>,
        "Shawn Guo" <shawnguo@...nel.org>,
        "Sascha Hauer" <s.hauer@...gutronix.de>,
        "Pengutronix Kernel Team" <kernel@...gutronix.de>,
        "Fabio Estevam" <festevam@...il.com>,
        "NXP Linux Team" <linux-imx@....com>,
        "Angus Ainslie (Purism)" <angus@...ea.ca>,
        "Martin Kepplinger" <martink@...teo.de>,
        Guido Günther <agx@...xcpu.org>,
        "Abel Vesa" <abel.vesa@....com>,
        "Anson Huang" <Anson.Huang@....com>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/2] arm64: dts: imx8mq-librem5-devkit: Use 0.9V for VDD_GPU

According to the imx8mq data sheet running VDD_GPU at 0.9V is enough
when not overclocking to 1GHz (which we currently don't do).

Signed-off-by: Guido Günther <guido.gunther@...i.sm>
---
 arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts b/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
index 10eca94194be..0526ebf0da0f 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
@@ -318,7 +318,7 @@ buck3_reg: BUCK3 {
 				regulator-min-microvolt = <700000>;
 				regulator-max-microvolt = <1300000>;
 				regulator-boot-on;
-				rohm,dvs-run-voltage = <1000000>;
+				rohm,dvs-run-voltage = <900000>;
 			};
 
 			buck4_reg: BUCK4 {
-- 
2.26.1