[v5,1/2] media: dt-bindings: Add ST VD55G1 camera sensor

Also update MAINTAINERS file accordingly.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Benjamin Mugnier <benjamin.mugnier@foss.st.com>
---
 .../devicetree/bindings/media/i2c/st,vd55g1.yaml   | 132 +++++++++++++++++++++
 MAINTAINERS                                        |   7 ++
 2 files changed, 139 insertions(+)

Hi Benjamin,

Thank you for the patch.

On Fri, Apr 04, 2025 at 04:50:51PM +0200, Benjamin Mugnier wrote:
> Also update MAINTAINERS file accordingly.
> 
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> Signed-off-by: Benjamin Mugnier <benjamin.mugnier@foss.st.com>
> ---
>  .../devicetree/bindings/media/i2c/st,vd55g1.yaml   | 132 +++++++++++++++++++++
>  MAINTAINERS                                        |   7 ++
>  2 files changed, 139 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/media/i2c/st,vd55g1.yaml b/Documentation/devicetree/bindings/media/i2c/st,vd55g1.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..6b777f86790da4e5941ac1cad86dc1a5021f9f5b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/i2c/st,vd55g1.yaml
> @@ -0,0 +1,132 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +# Copyright (c) 2025 STMicroelectronics SA.
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/i2c/st,vd55g1.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: STMicroelectronics VD55G1 Global Shutter Image Sensor
> +
> +maintainers:
> +  - Benjamin Mugnier <benjamin.mugnier@foss.st.com>
> +  - Sylvain Petinot <sylvain.petinot@foss.st.com>
> +
> +description: |-
> + The STMicroelectronics VD55G1 is a global shutter image sensor with an active
> + array size of 804H x 704V. It is programmable through I2C interface. The I2C
> + address is fixed to 0x10.

If you intend for this block of text to be split in two paragraphs, it's
missing a blank line here. Otherwise, it should be reflowed as a single
paragraph.

> + Image data is sent through MIPI CSI-2, which is configured as only 1 data
> + lane. The sensor provides 4 GPIOS that can be used for external LED signal
> + (synchronized with sensor integration periods).
> +
> +allOf:
> +  - $ref: /schemas/media/video-interface-devices.yaml#
> +
> +properties:
> +  compatible:
> +    const: st,vd55g1
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  vcore-supply:
> +    description: Digital core power supply (1.15V)
> +
> +  vddio-supply:
> +    description: Digital IO power supply (1.8V)
> +
> +  vana-supply:
> +    description: Analog power supply (2.8V)
> +
> +  reset-gpios:
> +    description: Sensor reset active low GPIO (XSHUTDOWN)
> +    maxItems: 1
> +
> +  st,leds:
> +    description:
> +      List sensor's GPIOs used to control strobe light sources during exposure
> +      time. The numbers identify the sensor pin on which the illumination
> +      system is connected. GPIOs are active-high.

If multiple GPIOs are specified, do they all serve the exact same
purpose, or is there a need to differentiate them ?

> +    $ref: /schemas/types.yaml#/definitions/uint32-array
> +    minItems: 1
> +    maxItems: 4
> +    items:
> +      minimum: 0
> +      maximum: 3
> +
> +  port:
> +    $ref: /schemas/graph.yaml#/$defs/port-base
> +    additionalProperties: false
> +
> +    properties:
> +      endpoint:
> +        $ref: /schemas/media/video-interfaces.yaml#
> +        unevaluatedProperties: false
> +
> +        properties:
> +          data-lanes:
> +            items:
> +              - const: 1
> +
> +          link-frequencies:
> +            maxItems: 1
> +            items:
> +              minimum: 125000000
> +              maximum: 600000000
> +
> +          lane-polarities:
> +            minItems: 1
> +            maxItems: 2

Does the sensor support non-continuous D-PHY clock ?

> +
> +        required:
> +          - data-lanes
> +          - link-frequencies
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - vcore-supply
> +  - vddio-supply
> +  - vana-supply
> +  - reset-gpios
> +  - port
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        camera-sensor@10 {
> +            compatible = "st,vd55g1";
> +            reg = <0x10>;
> +
> +            clocks = <&camera_clk_12M>;
> +
> +            vcore-supply = <&camera_vcore_v1v15>;
> +            vddio-supply = <&camera_vddio_v1v8>;
> +            vana-supply = <&camera_vana_v2v8>;
> +
> +            reset-gpios = <&gpio 5 GPIO_ACTIVE_LOW>;
> +            st,leds = <2>;
> +
> +            orientation = <2>;
> +            rotation = <0>;
> +
> +            port {
> +                endpoint {
> +                    data-lanes = <1>;
> +                    link-frequencies = /bits/ 64 <600000000>;
> +                    remote-endpoint = <&csiphy0_ep>;
> +                };
> +            };
> +        };
> +    };
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 2286200b355bde3604607be916ef09aa88feed0e..4f5e9005063a157de69e81b10f8def9da9e6c04c 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -22410,6 +22410,13 @@ S:	Maintained
>  F:	Documentation/hwmon/stpddc60.rst
>  F:	drivers/hwmon/pmbus/stpddc60.c
>  
> +ST VD55G1 DRIVER
> +M:	Benjamin Mugnier <benjamin.mugnier@foss.st.com>
> +M:	Sylvain Petinot <sylvain.petinot@foss.st.com>
> +L:	linux-media@vger.kernel.org
> +S:	Maintained
> +F:	Documentation/devicetree/bindings/media/i2c/st,vd55g1.yaml
> +
>  ST VGXY61 DRIVER
>  M:	Benjamin Mugnier <benjamin.mugnier@foss.st.com>
>  M:	Sylvain Petinot <sylvain.petinot@foss.st.com>