linux-kernel - Re: [RFC v3] dt-binding: media: document ON Semi AR0521 sensor bindings

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Date:   Mon, 26 Jul 2021 16:45:34 -0600
From:   Rob Herring <robh@...nel.org>
To:     Krzysztof Hałasa <khalasa@...p.pl>
Cc:     devicetree@...r.kernel.org,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: Re: [RFC v3] dt-binding: media: document ON Semi AR0521 sensor
 bindings

On Wed, Jul 21, 2021 at 10:06:34AM +0200, Krzysztof Hałasa wrote:
> This file documents DT bindings for the AR0521 camera sensor driver.
> 
> Signed-off-by: Krzysztof Hałasa <khalasa@...p.pl>
> ---
> Changes from v2:
> - changed "xclk" to "extclk"
> - power regulator names etc.
> - video output port properties
> - cosmetics
> - UTF-8 experiments :-)
> 
> diff --git a/Documentation/devicetree/bindings/media/i2c/onnn,ar0521.yaml b/Documentation/devicetree/bindings/media/i2c/onnn,ar0521.yaml
> new file mode 100644
> index 000000000000..785bae61bb5e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/i2c/onnn,ar0521.yaml
> @@ -0,0 +1,108 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/i2c/onnn,ar0521.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: ON Semiconductor AR0521 MIPI CSI-2 sensor
> +
> +maintainers:
> +  - Krzysztof Hałasa <khalasa@...p.pl>
> +
> +description: |-
> +  The AR0521 is a raw CMOS image sensor with MIPI CSI-2 and
> +  I2C-compatible control interface.
> +
> +properties:
> +  compatible:
> +    const: onnn,ar0521
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-names:
> +    const: extclk
> +
> +  vaa-supply:
> +    description:
> +      Definition of the regulator used as analog (2.7 V) voltage supply.
> +
> +  vdd-supply:
> +    description:
> +      Definition of the regulator used as digital core (1.2 V) voltage supply.
> +
> +  vdd_io-supply:
> +    description:
> +      Definition of the regulator used as digital I/O (1.8 V) voltage supply.
> +
> +  reset-gpios:
> +    description: reset GPIO, usually active low
> +    maxItems: 1
> +
> +  port:
> +    $ref: /schemas/graph.yaml#/properties/port

$ref: /schemas/graph.yaml#/$defs/port-base
unevaluatedProperties: false


> +    description: |
> +      Video output port.
> +
> +    properties:
> +      endpoint:
> +        $ref: /schemas/media/video-interfaces.yaml#

           unevaluatedProperties: false

> +
> +        properties:
> +          data-lanes:
> +            anyOf:
> +              - items:
> +                  - const: 1
> +              - items:
> +                  - const: 1
> +                  - const: 2
> +              - items:
> +                  - const: 1
> +                  - const: 2
> +                  - const: 3
> +                  - const: 4
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +  - vaa-supply
> +  - vdd-supply
> +  - vdd_io-supply
> +  - port
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +    #include <dt-bindings/clock/imx6qdl-clock.h>
> +
> +    i2c {
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +
> +            ar0521: camera-sensor@36 {
> +                    compatible = "onnn,ar0521";
> +                    reg = <0x36>;
> +                    pinctrl-names = "default";
> +                    pinctrl-0 = <&pinctrl_mipi_camera>;
> +                    clocks = <&clks IMX6QDL_CLK_CKO>;
> +                    clock-names = "extclk";
> +                    reset-gpios = <&gpio1 7 GPIO_ACTIVE_LOW>;
> +                    vaa-supply = <&reg_2p7v>;
> +                    vdd-supply = <&reg_1p2v>;
> +                    vdd_io-supply = <&reg_1p8v>;
> +
> +                    port {
> +                           mipi_camera_to_mipi_csi2: endpoint {
> +                                    remote-endpoint = <&mipi_csi2_in>;
> +                                    data-lanes = <1 2 3 4>;
> +                            };
> +                    };
> +            };
> +    };
> 
> -- 
> Krzysztof "Chris" Hałasa
> 
> Sieć Badawcza Łukasiewicz
> Przemysłowy Instytut Automatyki i Pomiarów PIAP
> Al. Jerozolimskie 202, 02-486 Warszawa
>