linux-kernel - Re: [PATCH v2 4/7] arm64: dts: ti: k3-j721e-sk: Add requiried voltage supplies for IMX219

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Message-ID: <16713a1b-1e74-4b08-bd4c-12dc0a9d32df@ti.com>
Date: Fri, 11 Apr 2025 19:08:18 +0530
From: "Francis, Neha" <n-francis@...com>
To: Yemike Abhilash Chandra <y-abhilashchandra@...com>, <nm@...com>,
        <vigneshr@...com>
CC: <kristo@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>, <vaishnav.a@...com>, <jai.luthra@...ux.dev>,
        <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <imx@...ts.linux.dev>, <linux-kernel@...r.kernel.org>,
        <u-kumar1@...com>, <stable@...r.kernel.org>
Subject: Re: [PATCH v2 4/7] arm64: dts: ti: k3-j721e-sk: Add requiried voltage
 supplies for IMX219

On 4/9/2025 7:11 PM, Yemike Abhilash Chandra wrote:
> The device tree overlay for the IMX219 sensor requires three voltage
> supplies to be defined: VANA (analog), VDIG (digital core), and VDDL
> (digital I/O). Add the corresponding voltage supply definitions to avoid
> dtbs_check warnings.
> 
> Fixes: f767eb918096 ("arm64: dts: ti: k3-j721e-sk: Add overlay for IMX219")
> Cc: stable@...r.kernel.org
> Signed-off-by: Yemike Abhilash Chandra <y-abhilashchandra@...com>
> ---
>  .../dts/ti/k3-j721e-sk-csi2-dual-imx219.dtso  | 33 +++++++++++++++++++
>  1 file changed, 33 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-j721e-sk-csi2-dual-imx219.dtso b/arch/arm64/boot/dts/ti/k3-j721e-sk-csi2-dual-imx219.dtso
> index 4a395d1209c8..4eb3cffab032 100644
> --- a/arch/arm64/boot/dts/ti/k3-j721e-sk-csi2-dual-imx219.dtso
> +++ b/arch/arm64/boot/dts/ti/k3-j721e-sk-csi2-dual-imx219.dtso

The link to the schematics seems to need updation, would like to see where these
regulators are mentioned, can't find them in [0] which I assume is the latest link.

> @@ -19,6 +19,33 @@ clk_imx219_fixed: imx219-xclk {
>  		#clock-cells = <0>;
>  		clock-frequency = <24000000>;
>  	};
> +
> +	reg_2p8v: regulator-2p8v {
> +		compatible = "regulator-fixed";
> +		regulator-name = "2P8V";
> +		regulator-min-microvolt = <2800000>;
> +		regulator-max-microvolt = <2800000>;
> +		vin-supply = <&vdd_sd_dv>;
> +		regulator-always-on;
> +	};
> +
> +	reg_1p8v: regulator-1p8v {
> +		compatible = "regulator-fixed";
> +		regulator-name = "1P8V";
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +		vin-supply = <&vdd_sd_dv>;
> +		regulator-always-on;
> +	};
> +
> +	reg_1p2v: regulator-1p2v {
> +		compatible = "regulator-fixed";
> +		regulator-name = "1P2V";
> +		regulator-min-microvolt = <1200000>;
> +		regulator-max-microvolt = <1200000>;
> +		vin-supply = <&vdd_sd_dv>;
> +		regulator-always-on;
> +	};
>  };
>  
>  &csi_mux {
> @@ -34,6 +61,9 @@ imx219_0: imx219-0@10 {
>  		reg = <0x10>;
>  
>  		clocks = <&clk_imx219_fixed>;
> +		VANA-supply = <&reg_2p8v>;
> +		VDIG-supply = <&reg_1p8v>;
> +		VDDL-supply = <&reg_1p2v>;
>  
>  		port {
>  			csi2_cam0: endpoint {
> @@ -55,6 +85,9 @@ imx219_1: imx219-1@10 {
>  		reg = <0x10>;
>  
>  		clocks = <&clk_imx219_fixed>;
> +		VANA-supply = <&reg_2p8v>;
> +		VDIG-supply = <&reg_1p8v>;
> +		VDDL-supply = <&reg_1p2v>;
>  
>  		port {
>  			csi2_cam1: endpoint {
[0] https://datasheets.raspberrypi.com/camera/camera-module-2-schematics.pdf

-- 
Thanking You
Neha Malcom Francis