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

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Message-ID: <87d38b3d-607d-45c3-8f29-70f6c01187db@ti.com>
Date: Fri, 2 May 2025 16:43:37 +0530
From: "Donadkar, Rishikesh" <r-donadkar@...com>
To: Devarsh Thakkar <devarsht@...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 4/4] arm64: dts: ti: k3-am62x: Add required voltage
 supplies for TEVI-OV5640


On 02-05-2025 14:37, Devarsh Thakkar wrote:
>
> On 29/04/25 21:11, Rishikesh Donadkar wrote:
>> The device tree overlay for TEVI-OV5640 requires following voltage
>> supplies:
>>
>> 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
>>
> I think this contradicts the voltage mentioned in TEVI-OV56540 doc [1]
> which mention digital voltage as 3.3 volts ?


Thank you for pointing out, I will fix it.

>
>> Add them in the DT overlay.
>>
> [1]:
> https://www.technexion.com/wp-content/uploads/2023/09/product-brief_tevi-ov5640.pdf
>
> Regards
> Devarsh
>> Signed-off-by: Rishikesh Donadkar <r-donadkar@...com>
>> ---
>>   .../dts/ti/k3-am62x-sk-csi2-tevi-ov5640.dtso  | 32 +++++++++++++++++++
>>   1 file changed, 32 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-tevi-ov5640.dtso b/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-tevi-ov5640.dtso
>> index b6bfdfbbdd984..123ab0e5e8dfa 100644
>> --- a/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-tevi-ov5640.dtso
>> +++ b/arch/arm64/boot/dts/ti/k3-am62x-sk-csi2-tevi-ov5640.dtso
>> @@ -15,6 +15,33 @@ clk_ov5640_fixed: ov5640-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 = <&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 {