linux-kernel - Re: [PATCH v1 3/4] arm64: dts: ti: k3-am62x: Add required voltage supplies for OV5640

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Message-ID: <69f6c225-2841-494c-b555-61cbe6b23c02@ti.com>
Date: Fri, 2 May 2025 14:13:04 +0530
From: Devarsh Thakkar <devarsht@...com>
To: Rishikesh Donadkar <r-donadkar@...com>, <nm@...com>, <vigneshr@...com>
CC: <kristo@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>, <vaishnav.a@...com>, <y-abhilashchandra@...com>,
        <s-jain1@...com>, <jai.luthra@...ux.dev>,
        <jai.luthra@...asonboard.com>, <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <imx@...ts.linux.dev>
Subject: Re: [PATCH v1 3/4] arm64: dts: ti: k3-am62x: Add required voltage
 supplies for OV5640

On 29/04/25 21:11, Rishikesh Donadkar wrote:
> The device tree overlay for OV5640 requires following voltage
> supplies

As mentioned in ov5640 data-sheet table 8-3 [1]
> 
> AVDD-supply: Analog voltage supply, 2.8 volts
> DOVDD-supply: Digital I/O voltage supply, 1.8 volts
> DVDD-supply: Digital core voltage supply, 1.5 volts
> 

[1]:
Link:
https://cdn.sparkfun.com/datasheets/Sensors/LightImaging/OV5640_datasheet.pdf

> Add them in the overlay.
> 
> Signed-off-by: Rishikesh Donadkar <r-donadkar@...com>

With above changes,
Reviewed-by: Devarsh Thakkar <devarsht@...com>

Regards
Devarsh
> ---
>  .../boot/dts/ti/k3-am62x-sk-csi2-ov5640.dtso  | 32 +++++++++++++++++++
>  1 file changed, 32 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-ov5640.dtso b/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-ov5640.dtso
> index 7fc7c95f5cd57..fc77fc77fe0b1 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-ov5640.dtso
> +++ b/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-ov5640.dtso
> @@ -15,6 +15,33 @@ clk_ov5640_fixed: ov5640-xclk {
>  		#clock-cells = <0>;
>  		clock-frequency = <12000000>;
>  	};
> +
> +	reg_2p8v: regulator-2p8v {
> +		compatible = "regulator-fixed";
> +		regulator-name = "2P8V";
> +		regulator-min-microvolt = <2800000>;
> +		regulator-max-microvolt = <2800000>;
> +		vin-supply = <&vcc_3v3_sys>;
> +		regulator-always-on;
> +	};
> +
> +	reg_1p8v: regulator-1p8v {
> +		compatible = "regulator-fixed";
> +		regulator-name = "1P8V";
> +		regulator-min-microvolt = <1800000>;
> +		regulator-max-microvolt = <1800000>;
> +		vin-supply = <&vcc_3v3_sys>;
> +		regulator-always-on;
> +	};
> +
> +	reg_1p5v: regulator-1p5v {
> +		compatible = "regulator-fixed";
> +		regulator-name = "1P5V";
> +		regulator-min-microvolt = <1500000>;
> +		regulator-max-microvolt = <1500000>;
> +		vin-supply = <&vcc_3v3_sys>;
> +		regulator-always-on;
> +	};
>  };
>  
>  &main_i2c2 {
> @@ -40,6 +67,11 @@ ov5640: camera@3c {
>  
>  				clocks = <&clk_ov5640_fixed>;
>  				clock-names = "xclk";
> +
> +				AVDD-supply = <&reg_2p8v>;
> +				DOVDD-supply = <&reg_1p8v>;
> +				DVDD-supply = <&reg_1p5v>;
> +
>  				powerdown-gpios = <&exp1 13 GPIO_ACTIVE_LOW>;
>  
>  				port {