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arm64: dts: imx8mm-kontron: Make sure SOC and DRAM supply voltages are correct

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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: 8668d8b2e6 ("arm64: dts: Add the Kontron i.MX8M Mini SoMs and baseboards")
Cc: stable@vger.kernel.org
Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Frieder Schrempf
2021-10-15 14:48:36 +02:00
committed by Shawn Guo
parent a1467faa10
commit 82a4f329b1
1 changed files with 4 additions and 2 deletions
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6
arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-som.dtsi
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@@ -91,10 +91,12 @@ regulators {
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_arm: BUCK2 {
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;
};