linux-kernel - [PATCH v1 2/2] arm64: dts: imx8mn-evk: fix the min/max voltages of the PMIC

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Message-Id: <20220223210559.1999209-2-michael@walle.cc>
Date:   Wed, 23 Feb 2022 22:05:59 +0100
From:   Michael Walle <michael@...le.cc>
To:     Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>
Cc:     heiko.thiery@...il.com, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Michael Walle <michael@...le.cc>
Subject: [PATCH v1 2/2] arm64: dts: imx8mn-evk: fix the min/max voltages of the PMIC

Use the proper voltages as supported by the board instead of the ones
supported by the PMIC. The voltages were taken from both the schematic
of the 8MNANOLPD4-EVK eval board and the datasheet of the IMX8MN SoC.

Signed-off-by: Michael Walle <michael@...le.cc>
---
Please help review and test this. This was never tested on the actual
8MNANOLPD4-EVK because I don't have that board! Instead it is a
"byproduct" of the development of an devicetree for the 8MNANOD3L-EVK
which is quite similar except for the DDR voltage and the buck1
converter.

 arch/arm64/boot/dts/freescale/imx8mn-evk.dts | 34 ++++++++++----------
 1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mn-evk.dts b/arch/arm64/boot/dts/freescale/imx8mn-evk.dts
index eaa06f49aef5..2bb0155ea018 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mn-evk.dts
@@ -42,8 +42,8 @@ pmic: pmic@25 {
 		regulators {
 			buck1: BUCK1{
 				regulator-name = "VDD_ARM_0V9";
-				regulator-min-microvolt = <600000>;
-				regulator-max-microvolt = <2187500>;
+				regulator-min-microvolt = <850000>;
+				regulator-max-microvolt = <1000000>;
 				regulator-boot-on;
 				regulator-always-on;
 				regulator-ramp-delay = <3125>;
@@ -51,8 +51,8 @@ buck1: BUCK1{
 
 			buck2: BUCK2 {
 				regulator-name = "VDD_SOC";
-				regulator-min-microvolt = <600000>;
-				regulator-max-microvolt = <2187500>;
+				regulator-min-microvolt = <850000>;
+				regulator-max-microvolt = <950000>;
 				regulator-boot-on;
 				regulator-always-on;
 				regulator-ramp-delay = <3125>;
@@ -62,32 +62,32 @@ buck2: BUCK2 {
 
 			buck4: BUCK4{
 				regulator-name = "VDD_3V3";
-				regulator-min-microvolt = <600000>;
-				regulator-max-microvolt = <3400000>;
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
 				regulator-boot-on;
 				regulator-always-on;
 			};
 
 			buck5: BUCK5{
 				regulator-name = "VDD_1V8";
-				regulator-min-microvolt = <600000>;
-				regulator-max-microvolt = <3400000>;
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
 				regulator-boot-on;
 				regulator-always-on;
 			};
 
 			buck6: BUCK6 {
 				regulator-name = "NVCC_DRAM_1V1";
-				regulator-min-microvolt = <600000>;
-				regulator-max-microvolt = <3400000>;
+				regulator-min-microvolt = <1100000>;
+				regulator-max-microvolt = <1100000>;
 				regulator-boot-on;
 				regulator-always-on;
 			};
 
 			ldo1: LDO1 {
 				regulator-name = "NVCC_SNVS_1V8";
-				regulator-min-microvolt = <1600000>;
-				regulator-max-microvolt = <3300000>;
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
 				regulator-boot-on;
 				regulator-always-on;
 			};
@@ -95,23 +95,23 @@ ldo1: LDO1 {
 			ldo2: LDO2 {
 				regulator-name = "VDD_SNVS_0V8";
 				regulator-min-microvolt = <800000>;
-				regulator-max-microvolt = <1150000>;
+				regulator-max-microvolt = <800000>;
 				regulator-boot-on;
 				regulator-always-on;
 			};
 
 			ldo3: LDO3 {
 				regulator-name = "VDDA_1V8";
-				regulator-min-microvolt = <800000>;
-				regulator-max-microvolt = <3300000>;
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
 				regulator-boot-on;
 				regulator-always-on;
 			};
 
 			ldo4: LDO4 {
 				regulator-name = "VDD_PHY_1V2";
-				regulator-min-microvolt = <800000>;
-				regulator-max-microvolt = <3300000>;
+				regulator-min-microvolt = <1200000>;
+				regulator-max-microvolt = <1200000>;
 				regulator-boot-on;
 				regulator-always-on;
 			};
-- 
2.30.2