Re: [PATCH v4 2/3] media: dt-bindings: ov2685: convert to dtschema

[Luca Weiss]

Hi Sakari,

Sakari Ailus <sakari.ailus@xxxxxx> schreef op 31 maart 2023 10:39:16 CEST:
>Hi Luca,
>
>Thanks for the patch.
>
>On Thu, Mar 23, 2023 at 06:57:50PM +0100, Luca Weiss wrote:
>> Convert the text-based dt-bindings to yaml.
>> 
>> Changes from original txt:
>> * Take wording for various properties from other yaml bindings, this
>>   removes e.g. volt amount from schema since it isn't really relevant
>>   and the datasheet is a better source.
>> * Don't make reset-gpios a required property since it can be tied to
>>   DOVDD instead.
>> 
>> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
>> Signed-off-by: Luca Weiss <luca@xxxxxxxxx>
>> ---
>>  .../devicetree/bindings/media/i2c/ov2685.txt       |  41 ---------
>>  .../devicetree/bindings/media/i2c/ovti,ov2685.yaml | 101 +++++++++++++++++++++
>>  MAINTAINERS                                        |   1 +
>>  3 files changed, 102 insertions(+), 41 deletions(-)
>> 
>> diff --git a/Documentation/devicetree/bindings/media/i2c/ov2685.txt b/Documentation/devicetree/bindings/media/i2c/ov2685.txt
>> deleted file mode 100644
>> index 625c4a8c0d53d..0000000000000
>> --- a/Documentation/devicetree/bindings/media/i2c/ov2685.txt
>> +++ /dev/null
>> @@ -1,41 +0,0 @@
>> -* Omnivision OV2685 MIPI CSI-2 sensor
>> -
>> -Required Properties:
>> -- compatible: shall be "ovti,ov2685"
>> -- clocks: reference to the xvclk input clock
>> -- clock-names: shall be "xvclk"
>> -- avdd-supply: Analog voltage supply, 2.8 volts
>> -- dovdd-supply: Digital I/O voltage supply, 1.8 volts
>> -- dvdd-supply: Digital core voltage supply, 1.8 volts
>> -- reset-gpios: Low active reset gpio
>> -
>> -The device node shall contain one 'port' child node with an
>> -'endpoint' subnode for its digital output video port,
>> -in accordance with the video interface bindings defined in
>> -Documentation/devicetree/bindings/media/video-interfaces.txt.
>> -The endpoint optional property 'data-lanes' shall be "<1>".
>> -
>> -Example:
>> -&i2c7 {
>> -	ov2685: camera-sensor@3c {
>> -		compatible = "ovti,ov2685";
>> -		reg = <0x3c>;
>> -		pinctrl-names = "default";
>> -		pinctrl-0 = <&clk_24m_cam>;
>> -
>> -		clocks = <&cru SCLK_TESTCLKOUT1>;
>> -		clock-names = "xvclk";
>> -
>> -		avdd-supply = <&pp2800_cam>;
>> -		dovdd-supply = <&pp1800>;
>> -		dvdd-supply = <&pp1800>;
>> -		reset-gpios = <&gpio2 3 GPIO_ACTIVE_LOW>;
>> -
>> -		port {
>> -			ucam_out: endpoint {
>> -				remote-endpoint = <&mipi_in_ucam>;
>> -				data-lanes = <1>;
>> -			};
>> -		};
>> -	};
>> -};
>> diff --git a/Documentation/devicetree/bindings/media/i2c/ovti,ov2685.yaml b/Documentation/devicetree/bindings/media/i2c/ovti,ov2685.yaml
>> new file mode 100644
>> index 0000000000000..2ac0ca8a0413b
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/media/i2c/ovti,ov2685.yaml
>> @@ -0,0 +1,101 @@
>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/media/i2c/ovti,ov2685.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: OmniVision OV2685 Image Sensor
>> +
>> +maintainers:
>> +  - Shunqian Zheng <zhengsq@xxxxxxxxxxxxxx>
>> +
>> +properties:
>> +  compatible:
>> +    const: ovti,ov2685
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  clocks:
>> +    items:
>> +      - description: XVCLK clock
>> +
>> +  clock-names:
>> +    items:
>> +      - const: xvclk
>> +
>> +  dvdd-supply:
>> +    description: Digital Domain Power Supply
>> +
>> +  avdd-supply:
>> +    description: Analog Domain Power Supply
>> +
>> +  dovdd-supply:
>> +    description: I/O Domain Power Supply
>> +
>> +  reset-gpios:
>> +    maxItems: 1
>> +    description: Reset Pin GPIO Control (active low)
>> +
>> +  port:
>> +    description: MIPI CSI-2 transmitter port
>> +    $ref: /schemas/graph.yaml#/$defs/port-base
>> +    additionalProperties: false
>> +
>> +    properties:
>> +      endpoint:
>> +        $ref: /schemas/media/video-interfaces.yaml#
>> +        unevaluatedProperties: false
>> +
>> +        properties:
>> +          data-lanes:
>> +            maxItems: 1
>
>This should be 2 --- the sensor supports two lanes (even if the driver
>doesn't).

Right, for some reason the product brief mentions that it features "a single-lane MIPI interface" but the datasheet I have writes that it has a 2-lane MIPI serial output, so I guess it does support two lanes?

>
>I can address this when applying if that's ok.

That would be nice, thanks!

Regards
Luca

>
>> +
>> +        required:
>> +          - data-lanes
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - clocks
>> +  - clock-names
>> +  - dvdd-supply
>> +  - avdd-supply
>> +  - dovdd-supply
>> +  - port
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/clock/rk3399-cru.h>
>> +    #include <dt-bindings/gpio/gpio.h>
>> +
>> +    i2c {
>> +        #address-cells = <1>;
>> +        #size-cells = <0>;
>> +
>> +        ov2685: camera-sensor@3c {
>> +            compatible = "ovti,ov2685";
>> +            reg = <0x3c>;
>> +            pinctrl-names = "default";
>> +            pinctrl-0 = <&clk_24m_cam>;
>> +
>> +            clocks = <&cru SCLK_TESTCLKOUT1>;
>> +            clock-names = "xvclk";
>> +
>> +            avdd-supply = <&pp2800_cam>;
>> +            dovdd-supply = <&pp1800>;
>> +            dvdd-supply = <&pp1800>;
>> +            reset-gpios = <&gpio2 3 GPIO_ACTIVE_LOW>;
>> +
>> +            port {
>> +                ucam_out: endpoint {
>> +                    remote-endpoint = <&mipi_in_ucam>;
>> +                    data-lanes = <1>;
>> +                };
>> +            };
>> +        };
>> +    };
>> +
>> +...
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index 8ea325040f355..5904f47756fe1 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -15410,6 +15410,7 @@ M:	Shunqian Zheng <zhengsq@xxxxxxxxxxxxxx>
>>  L:	linux-media@xxxxxxxxxxxxxxx
>>  S:	Maintained
>>  T:	git git://linuxtv.org/media_tree.git
>> +F:	Documentation/devicetree/bindings/media/i2c/ovti,ov2685.yaml
>>  F:	drivers/media/i2c/ov2685.c
>>  
>>  OMNIVISION OV2740 SENSOR DRIVER
>> 
>