Commit 82a4f329 authored by Frieder Schrempf's avatar Frieder Schrempf Committed by Shawn Guo
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arm64: dts: imx8mm-kontron: Make sure SOC and DRAM supply voltages are correct 



It looks like the voltages for the SOC and DRAM supply weren't properly
validated before. The datasheet and uboot-imx code tells us that VDD_SOC
should be 800 mV in suspend and 850 mV in run mode. VDD_DRAM should be
950 mV for DDR clock frequencies of up to 1.5 GHz.

Let's fix these values to make sure the voltages are within the required
range.

Fixes: 8668d8b2 ("arm64: dts: Add the Kontron i.MX8M Mini SoMs and baseboards")
Cc: stable@vger.kernel.org
Signed-off-by: default avatarFrieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: default avatarShawn Guo <shawnguo@kernel.org>
parent a1467faa

arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-som.dtsi

+4 −2
Original line number Diff line number Diff line
@@ -91,10 +91,12 @@ 
			reg_vdd_soc: BUCK1 {

				regulator-name = "buck1";

				regulator-min-microvolt = <800000>;

				regulator-max-microvolt = <900000>;

				regulator-max-microvolt = <850000>;

				regulator-boot-on;

				regulator-always-on;

				regulator-ramp-delay = <3125>;

				nxp,dvs-run-voltage = <850000>;

				nxp,dvs-standby-voltage = <800000>;

			};



			reg_vdd_arm: BUCK2 {
@@ -111,7 +113,7 @@ 
			reg_vdd_dram: BUCK3 {

				regulator-name = "buck3";

				regulator-min-microvolt = <850000>;

				regulator-max-microvolt = <900000>;

				regulator-max-microvolt = <950000>;

				regulator-boot-on;

				regulator-always-on;

			};