linux-kernel - Re: [PATCH 2/4] arm64: dts: imx8mp-phycore-som: add spi-nor supply vcc

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Message-ID: <aPZXCJZQaNnrxC7p@lizhi-Precision-Tower-5810>
Date: Mon, 20 Oct 2025 11:36:40 -0400
From: Frank Li <Frank.li@....com>
To: Yannic Moog <y.moog@...tec.de>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, upstream@...ts.phytec.de,
	devicetree@...r.kernel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] arm64: dts: imx8mp-phycore-som: add spi-nor supply
 vcc

On Mon, Oct 20, 2025 at 03:11:23PM +0200, Yannic Moog wrote:
> The spi flash on the SoM is missing its vcc supply definition. Add
> missing regulator which supplies the flash with 1.8V.
>
> Signed-off-by: Yannic Moog <y.moog@...tec.de>
> ---
>  arch/arm64/boot/dts/freescale/imx8mp-phycore-som.dtsi | 10 ++++++++++
>  1 file changed, 10 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-phycore-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-phycore-som.dtsi
> index 88831c0fbb7be3db18910385e4e15691b1c74ef2..d370e2a3a00c5e3e91a606ac0fbed30cf5e6f9b2 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp-phycore-som.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-phycore-som.dtsi
> @@ -28,6 +28,15 @@ reg_vdd_io: regulator-vdd-io {
>  		regulator-min-microvolt = <3300000>;
>  		regulator-name = "VDD_IO";
>  	};
> +
> +	reg_vdd_1v8: regulator-vdd-1v8 {
> +		compatible = "regulator-fixed";
> +		regulator-always-on;
> +		regulator-boot-on;

Needn't regulator-always-on and regulator-boot-on because it is refered
by flash@0.

Frank

> +		regulator-max-microvolt = <1800000>;
> +		regulator-min-microvolt = <1800000>;
> +		regulator-name = "VDD_1V8";
> +	};
>  };
>
>  &A53_0 {
> @@ -83,6 +92,7 @@ som_flash: flash@0 {
>  		spi-max-frequency = <80000000>;
>  		spi-rx-bus-width = <4>;
>  		spi-tx-bus-width = <1>;
> +		vcc-supply = <&reg_vdd_1v8>;
>  	};
>  };
>
>
> --
> 2.51.0
>