linux-kernel - [PATCH V2] arm64: dts: imx8mn: Adjust 1.2GHz OPP voltage to OD mode

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Message-Id: <1582510060-12272-1-git-send-email-Anson.Huang@nxp.com>
Date:   Mon, 24 Feb 2020 10:07:40 +0800
From:   Anson Huang <Anson.Huang@....com>
To:     robh+dt@...nel.org, mark.rutland@....com, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
        leonard.crestez@....com, daniel.baluta@....com,
        horia.geanta@....com, peng.fan@....com, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Linux-imx@....com
Subject: [PATCH V2] arm64: dts: imx8mn: Adjust 1.2GHz OPP voltage to OD mode

According to latest datasheet Rev.0, 10/2019, there is restriction
as below:

"If VDD_SOC/GPU/DDR = 0.95V, then VDD_ARM must be >= 0.95V."

As by default SoC is running at OD mode(VDD_SOC = 0.95V), so
VDD_ARM 1.2GHz OPP's voltage should be increased to 0.95V.

Signed-off-by: Anson Huang <Anson.Huang@....com>
---
Changes since V1:
	- Move the OPP change from board dts for soc dtsi.
---
 arch/arm64/boot/dts/freescale/imx8mn.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mn.dtsi b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
index c98a376..f277572 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
@@ -116,7 +116,7 @@
 
 		opp-1200000000 {
 			opp-hz = /bits/ 64 <1200000000>;
-			opp-microvolt = <850000>;
+			opp-microvolt = <950000>;
 			opp-supported-hw = <0xb00>, <0x7>;
 			clock-latency-ns = <150000>;
 			opp-suspend;
-- 
2.7.4