[PATCH 2/8] arm64: dts: imx8mm-kontron: Make sure SOC and DRAM supply voltages are correct
From: Frieder Schrempf <hidden>
Date: 2021-09-30 15:56:59
Also in:
linux-arm-kernel, lkml
Subsystem:
arm/freescale imx / mxc arm architecture, the rest · Maintainers:
Frank Li, Sascha Hauer, Linus Torvalds
From: Frieder Schrempf <redacted> 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 1.5 GHz. This information is taken from the datasheet and the uboot-imx code. Signed-off-by: Frieder Schrempf <redacted> --- arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-som.dtsi | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-som.dtsi
index 03b3516abd64..b12fb7ce6686 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-som.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-som.dtsi@@ -92,10 +92,12 @@ 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; };
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2.33.0