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Date: Thu, 24 Feb 2022 13:09:31 +0100
From: Heiko Thiery <heiko.thiery@...il.com>
To: Michael Walle <michael@...le.cc>
Cc: Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Fabio Estevam <festevam@...il.com>,
NXP Linux Team <linux-imx@....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>
Subject: Re: [PATCH v2 2/2] arm64: dts: imx8mn-evk: fix the min/max voltages
of the PMIC
Hi,
Am Do., 24. Feb. 2022 um 11:30 Uhr schrieb Michael Walle <michael@...le.cc>:
>
> 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>
Reviewed-by: Heiko Thiery <heiko.thiery@...il.com>
> ---
> 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 buck2
> converter.
>
> Changes since v1:
> - swap buck1 and buck2
>
> 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 2b685c0c7eeb..4eb467df5ba7 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_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>;
> @@ -51,8 +51,8 @@ buck1: BUCK1{
>
> buck2: BUCK2 {
> 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>;
> @@ -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
>
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