[v6,1/2] dt-bindings: media: i2c: Add bindings for Maxim Integrated MAX9286
diff mbox series

Message ID 20191211124459.20508-2-kieran.bingham+renesas@ideasonboard.com
State New
Delegated to: Kieran Bingham
Headers show
Series
  • MAX9286 GMSL Support
Related show

Commit Message

Kieran Bingham Dec. 11, 2019, 12:44 p.m. UTC
From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

The MAX9286 deserializes video data received on up to 4 Gigabit
Multimedia Serial Links (GMSL) and outputs them on a CSI-2 port using up
to 4 data lanes.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
---
 .../bindings/media/i2c/maxim,max9286.yaml     | 289 ++++++++++++++++++
 1 file changed, 289 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml

Comments

Rob Herring Dec. 18, 2019, 6:13 p.m. UTC | #1
On Wed, Dec 11, 2019 at 12:44:58PM +0000, Kieran Bingham wrote:
> From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> 
> The MAX9286 deserializes video data received on up to 4 Gigabit
> Multimedia Serial Links (GMSL) and outputs them on a CSI-2 port using up
> to 4 data lanes.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
> ---
>  .../bindings/media/i2c/maxim,max9286.yaml     | 289 ++++++++++++++++++
>  1 file changed, 289 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml

A couple of nits, with those fixed:

Reviewed-by: Rob Herring <robh@kernel.org>

> 
> diff --git a/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
> new file mode 100644
> index 000000000000..d37ea2c432f6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
> @@ -0,0 +1,289 @@
> +# SPDX-License-Identifier: GPL-2.0-only

Dual license new bindings please:

(GPL-2.0-only OR BSD-2-Clause)

> +# Copyright (C) 2019 Renesas Electronics Corp.
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/i2c/maxim,max9286.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Maxim Integrated Quad GMSL Deserializer
> +
> +maintainers:
> +  - Jacopo Mondi <jacopo+renesas@jmondi.org>
> +  - Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> +  - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
> +  - Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
> +
> +description: -|

I usually see '|-', but I guess that works.

> +  The MAX9286 deserializer receives video data on up to 4 Gigabit Multimedia
> +  Serial Links (GMSL) and outputs them on a CSI-2 D-PHY port using up to 4 data
> +  lanes.
> +
> +  In addition to video data, the GMSL links carry a bidirectional control
> +  channel that encapsulates I2C messages. The MAX9286 forwards all I2C traffic
> +  not addressed to itself to the other side of the links, where a GMSL
> +  serializer will output it on a local I2C bus. In the other direction all I2C
> +  traffic received over GMSL by the MAX9286 is output on the local I2C bus.
> +
> +properties:
> +  '#address-cells':
> +    const: 1
> +
> +  '#size-cells':
> +    const: 0
> +
> +  compatible:
> +    const: maxim,max9286
> +
> +  reg:
> +    description: I2C device address
> +    maxItems: 1
> +
> +  poc-supply:
> +    description: Regulator providing Power over Coax to the cameras
> +    maxItems: 1
> +
> +  enable-gpios:
> +    description: GPIO connected to the \#PWDN pin with inverted polarity
> +    maxItems: 1
> +
> +  ports:
> +    type: object
> +    description: -|
> +      The connections to the MAX9286 GMSL and its endpoint nodes are modelled
> +      using the OF graph bindings in accordance with the video interface
> +      bindings defined in
> +      Documentation/devicetree/bindings/media/video-interfaces.txt.
> +
> +      The following table lists the port number corresponding to each device
> +      port.
> +
> +        Port            Description
> +        ----------------------------------------
> +        Port 0          GMSL Input 0
> +        Port 1          GMSL Input 1
> +        Port 2          GMSL Input 2
> +        Port 3          GMSL Input 3
> +        Port 4          CSI-2 Output
> +
> +    properties:
> +      '#address-cells':
> +        const: 1
> +
> +      '#size-cells':
> +        const: 0
> +
> +      port@[0-3]:
> +        type: object
> +        properties:
> +          reg:
> +            enum: [ 0, 1, 2, 3 ]
> +
> +          endpoint:
> +            type: object
> +
> +            properties:
> +              remote-endpoint:
> +                description: -|
> +                 phandle to the remote GMSL source endpoint subnode in the
> +                 remote node port.
> +                maxItems: 1

This is not an array. You can just drop and assume it has a type defined 
elsewhere.

> +
> +            required:
> +              - remote-endpoint
> +
> +        required:
> +          - reg
> +          - endpoint
> +
> +        additionalProperties: false
> +
> +      port@4:
> +        type: object
> +        properties:
> +          reg:
> +            const: 4
> +
> +          endpoint:
> +            type: object
> +
> +            properties:
> +              remote-endpoint:
> +                description: phandle to the remote CSI-2 sink endpoint.
> +                maxItems: 1

And here.

> +
> +              data-lanes:
> +                description: array of physical CSI-2 data lane indexes.
> +
> +            required:
> +              - remote-endpoint
> +              - data-lanes
> +
> +        required:
> +          - reg
> +          - endpoint
> +
> +        additionalProperties: false
> +
> +    required:
> +      - port@4
> +
> +  i2c-mux:
> +    type: object
> +    description: -|
> +      Each GMSL link is modelled as a child bus of an i2c bus
> +      multiplexer/switch, in accordance with bindings described in
> +      Documentation/devicetree/bindings/i2c/i2c-mux.txt. The serializer
> +      device on the remote end of the GMSL link shall be modelled as a child
> +      node of the corresponding I2C bus.
> +
> +    properties:
> +      '#address-cells':
> +        const: 1
> +
> +      '#size-cells':
> +        const: 0
> +
> +  additionalProperties: false
> +
> +required:
> +  - compatible
> +  - reg
> +  - ports
> +  - i2c-mux
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +
> +    i2c@e66d8000 {
> +      #address-cells = <1>;
> +      #size-cells = <0>;
> +
> +      reg = <0 0xe66d8000 0 0x40>;
> +
> +      gmsl-deserializer@2c {
> +        compatible = "maxim,max9286";
> +        reg = <0x2c>;
> +        poc-supply = <&camera_poc_12v>;
> +        enable-gpios = <&gpio 13 GPIO_ACTIVE_HIGH>;
> +
> +        ports {
> +          #address-cells = <1>;
> +          #size-cells = <0>;
> +
> +          port@0 {
> +            reg = <0>;
> +
> +            max9286_in0: endpoint {
> +              remote-endpoint = <&rdacm20_out0>;
> +            };
> +          };
> +
> +          port@1 {
> +            reg = <1>;
> +
> +            max9286_in1: endpoint {
> +              remote-endpoint = <&rdacm20_out1>;
> +            };
> +          };
> +
> +          port@2 {
> +            reg = <2>;
> +
> +            max9286_in2: endpoint {
> +              remote-endpoint = <&rdacm20_out2>;
> +            };
> +          };
> +
> +          port@3 {
> +            reg = <3>;
> +
> +            max9286_in3: endpoint {
> +              remote-endpoint = <&rdacm20_out3>;
> +            };
> +          };
> +
> +          port@4 {
> +            reg = <4>;
> +
> +            max9286_out: endpoint {
> +              data-lanes = <1 2 3 4>;
> +              remote-endpoint = <&csi40_in>;
> +            };
> +          };
> +        };
> +
> +        i2c-mux {
> +          #address-cells = <1>;
> +          #size-cells = <0>;
> +
> +          i2c@0 {
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +
> +            reg = <0>;
> +
> +            camera@51 {
> +              reg = <0x51>;
> +
> +              port {
> +                rdacm20_out0: endpoint {
> +                  remote-endpoint = <&max9286_in0>;
> +                };
> +              };
> +
> +            };
> +          };
> +
> +          i2c@1 {
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +            reg = <1>;
> +
> +            camera@52 {
> +              reg = <0x52>;
> +
> +              port {
> +                rdacm20_out1: endpoint {
> +                  remote-endpoint = <&max9286_in1>;
> +                };
> +              };
> +            };
> +          };
> +
> +          i2c@2 {
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +            reg = <2>;
> +
> +            camera@53 {
> +              reg = <0x53>;
> +
> +              port {
> +                rdacm20_out2: endpoint {
> +                  remote-endpoint = <&max9286_in2>;
> +                };
> +              };
> +            };
> +          };
> +
> +          i2c@3 {
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +            reg = <3>;
> +
> +            camera@54 {
> +              reg = <0x54>;
> +
> +              port {
> +                rdacm20_out3: endpoint {
> +                  remote-endpoint = <&max9286_in3>;
> +                };
> +              };
> +            };
> +          };
> +        };
> +      };
> +    };
> -- 
> 2.20.1
>
Kieran Bingham Dec. 19, 2019, 11:46 a.m. UTC | #2
Thanks Rob,

On 18/12/2019 18:13, Rob Herring wrote:
> On Wed, Dec 11, 2019 at 12:44:58PM +0000, Kieran Bingham wrote:
>> From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
>>
>> The MAX9286 deserializes video data received on up to 4 Gigabit
>> Multimedia Serial Links (GMSL) and outputs them on a CSI-2 port using up
>> to 4 data lanes.
>>
>> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
>> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
>> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
>> Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
>> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
>> ---
>>  .../bindings/media/i2c/maxim,max9286.yaml     | 289 ++++++++++++++++++
>>  1 file changed, 289 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
> 
> A couple of nits, with those fixed:

I'll fix them up :-D
Thank you very much.

Converting this to YAML picked up a few issues in our DTS - so it
certainly seems very worthwhile!

--
Kieran


> Reviewed-by: Rob Herring <robh@kernel.org>
> 
>>
>> diff --git a/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
>> new file mode 100644
>> index 000000000000..d37ea2c432f6
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
>> @@ -0,0 +1,289 @@
>> +# SPDX-License-Identifier: GPL-2.0-only
> 
> Dual license new bindings please:
> 
> (GPL-2.0-only OR BSD-2-Clause)

That's two of those I've got to fix up for you :D. I'll make sure all
new ones I add have this correctly presented.


>> +# Copyright (C) 2019 Renesas Electronics Corp.
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/media/i2c/maxim,max9286.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Maxim Integrated Quad GMSL Deserializer
>> +
>> +maintainers:
>> +  - Jacopo Mondi <jacopo+renesas@jmondi.org>
>> +  - Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
>> +  - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
>> +  - Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
>> +
>> +description: -|
> 
> I usually see '|-', but I guess that works.

Oh, I'm happy to change to conform to whatever is the accepted norm...

> 
>> +  The MAX9286 deserializer receives video data on up to 4 Gigabit Multimedia
>> +  Serial Links (GMSL) and outputs them on a CSI-2 D-PHY port using up to 4 data
>> +  lanes.
>> +
>> +  In addition to video data, the GMSL links carry a bidirectional control
>> +  channel that encapsulates I2C messages. The MAX9286 forwards all I2C traffic
>> +  not addressed to itself to the other side of the links, where a GMSL
>> +  serializer will output it on a local I2C bus. In the other direction all I2C
>> +  traffic received over GMSL by the MAX9286 is output on the local I2C bus.
>> +
>> +properties:
>> +  '#address-cells':
>> +    const: 1
>> +
>> +  '#size-cells':
>> +    const: 0
>> +
>> +  compatible:
>> +    const: maxim,max9286
>> +
>> +  reg:
>> +    description: I2C device address
>> +    maxItems: 1
>> +
>> +  poc-supply:
>> +    description: Regulator providing Power over Coax to the cameras
>> +    maxItems: 1
>> +
>> +  enable-gpios:
>> +    description: GPIO connected to the \#PWDN pin with inverted polarity
>> +    maxItems: 1
>> +
>> +  ports:
>> +    type: object
>> +    description: -|
>> +      The connections to the MAX9286 GMSL and its endpoint nodes are modelled
>> +      using the OF graph bindings in accordance with the video interface
>> +      bindings defined in
>> +      Documentation/devicetree/bindings/media/video-interfaces.txt.
>> +
>> +      The following table lists the port number corresponding to each device
>> +      port.
>> +
>> +        Port            Description
>> +        ----------------------------------------
>> +        Port 0          GMSL Input 0
>> +        Port 1          GMSL Input 1
>> +        Port 2          GMSL Input 2
>> +        Port 3          GMSL Input 3
>> +        Port 4          CSI-2 Output
>> +
>> +    properties:
>> +      '#address-cells':
>> +        const: 1
>> +
>> +      '#size-cells':
>> +        const: 0
>> +
>> +      port@[0-3]:
>> +        type: object
>> +        properties:
>> +          reg:
>> +            enum: [ 0, 1, 2, 3 ]
>> +
>> +          endpoint:
>> +            type: object
>> +
>> +            properties:
>> +              remote-endpoint:
>> +                description: -|
>> +                 phandle to the remote GMSL source endpoint subnode in the
>> +                 remote node port.
>> +                maxItems: 1
> 
> This is not an array. You can just drop and assume it has a type defined 
> elsewhere.
> 

Will fix and validate.

>> +
>> +            required:
>> +              - remote-endpoint
>> +
>> +        required:
>> +          - reg
>> +          - endpoint
>> +
>> +        additionalProperties: false
>> +
>> +      port@4:
>> +        type: object
>> +        properties:
>> +          reg:
>> +            const: 4
>> +
>> +          endpoint:
>> +            type: object
>> +
>> +            properties:
>> +              remote-endpoint:
>> +                description: phandle to the remote CSI-2 sink endpoint.
>> +                maxItems: 1
> 
> And here.

Likewise.

> 
>> +
>> +              data-lanes:
>> +                description: array of physical CSI-2 data lane indexes.
>> +
>> +            required:
>> +              - remote-endpoint
>> +              - data-lanes
>> +
>> +        required:
>> +          - reg
>> +          - endpoint
>> +
>> +        additionalProperties: false
>> +
>> +    required:
>> +      - port@4
>> +
>> +  i2c-mux:
>> +    type: object
>> +    description: -|
>> +      Each GMSL link is modelled as a child bus of an i2c bus
>> +      multiplexer/switch, in accordance with bindings described in
>> +      Documentation/devicetree/bindings/i2c/i2c-mux.txt. The serializer
>> +      device on the remote end of the GMSL link shall be modelled as a child
>> +      node of the corresponding I2C bus.
>> +
>> +    properties:
>> +      '#address-cells':
>> +        const: 1
>> +
>> +      '#size-cells':
>> +        const: 0
>> +
>> +  additionalProperties: false
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - ports
>> +  - i2c-mux
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/gpio/gpio.h>
>> +
>> +    i2c@e66d8000 {
>> +      #address-cells = <1>;
>> +      #size-cells = <0>;
>> +
>> +      reg = <0 0xe66d8000 0 0x40>;
>> +
>> +      gmsl-deserializer@2c {
>> +        compatible = "maxim,max9286";
>> +        reg = <0x2c>;
>> +        poc-supply = <&camera_poc_12v>;
>> +        enable-gpios = <&gpio 13 GPIO_ACTIVE_HIGH>;
>> +
>> +        ports {
>> +          #address-cells = <1>;
>> +          #size-cells = <0>;
>> +
>> +          port@0 {
>> +            reg = <0>;
>> +
>> +            max9286_in0: endpoint {
>> +              remote-endpoint = <&rdacm20_out0>;
>> +            };
>> +          };
>> +
>> +          port@1 {
>> +            reg = <1>;
>> +
>> +            max9286_in1: endpoint {
>> +              remote-endpoint = <&rdacm20_out1>;
>> +            };
>> +          };
>> +
>> +          port@2 {
>> +            reg = <2>;
>> +
>> +            max9286_in2: endpoint {
>> +              remote-endpoint = <&rdacm20_out2>;
>> +            };
>> +          };
>> +
>> +          port@3 {
>> +            reg = <3>;
>> +
>> +            max9286_in3: endpoint {
>> +              remote-endpoint = <&rdacm20_out3>;
>> +            };
>> +          };
>> +
>> +          port@4 {
>> +            reg = <4>;
>> +
>> +            max9286_out: endpoint {
>> +              data-lanes = <1 2 3 4>;
>> +              remote-endpoint = <&csi40_in>;
>> +            };
>> +          };
>> +        };
>> +
>> +        i2c-mux {
>> +          #address-cells = <1>;
>> +          #size-cells = <0>;
>> +
>> +          i2c@0 {
>> +            #address-cells = <1>;
>> +            #size-cells = <0>;
>> +
>> +            reg = <0>;
>> +
>> +            camera@51 {
>> +              reg = <0x51>;
>> +
>> +              port {
>> +                rdacm20_out0: endpoint {
>> +                  remote-endpoint = <&max9286_in0>;
>> +                };
>> +              };
>> +
>> +            };
>> +          };
>> +
>> +          i2c@1 {
>> +            #address-cells = <1>;
>> +            #size-cells = <0>;
>> +            reg = <1>;
>> +
>> +            camera@52 {
>> +              reg = <0x52>;
>> +
>> +              port {
>> +                rdacm20_out1: endpoint {
>> +                  remote-endpoint = <&max9286_in1>;
>> +                };
>> +              };
>> +            };
>> +          };
>> +
>> +          i2c@2 {
>> +            #address-cells = <1>;
>> +            #size-cells = <0>;
>> +            reg = <2>;
>> +
>> +            camera@53 {
>> +              reg = <0x53>;
>> +
>> +              port {
>> +                rdacm20_out2: endpoint {
>> +                  remote-endpoint = <&max9286_in2>;
>> +                };
>> +              };
>> +            };
>> +          };
>> +
>> +          i2c@3 {
>> +            #address-cells = <1>;
>> +            #size-cells = <0>;
>> +            reg = <3>;
>> +
>> +            camera@54 {
>> +              reg = <0x54>;
>> +
>> +              port {
>> +                rdacm20_out3: endpoint {
>> +                  remote-endpoint = <&max9286_in3>;
>> +                };
>> +              };
>> +            };
>> +          };
>> +        };
>> +      };
>> +    };
>> -- 
>> 2.20.1
>>

Patch
diff mbox series

diff --git a/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
new file mode 100644
index 000000000000..d37ea2c432f6
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.yaml
@@ -0,0 +1,289 @@ 
+# SPDX-License-Identifier: GPL-2.0-only
+# Copyright (C) 2019 Renesas Electronics Corp.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/i2c/maxim,max9286.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim Integrated Quad GMSL Deserializer
+
+maintainers:
+  - Jacopo Mondi <jacopo+renesas@jmondi.org>
+  - Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
+  - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
+  - Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
+
+description: -|
+  The MAX9286 deserializer receives video data on up to 4 Gigabit Multimedia
+  Serial Links (GMSL) and outputs them on a CSI-2 D-PHY port using up to 4 data
+  lanes.
+
+  In addition to video data, the GMSL links carry a bidirectional control
+  channel that encapsulates I2C messages. The MAX9286 forwards all I2C traffic
+  not addressed to itself to the other side of the links, where a GMSL
+  serializer will output it on a local I2C bus. In the other direction all I2C
+  traffic received over GMSL by the MAX9286 is output on the local I2C bus.
+
+properties:
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+  compatible:
+    const: maxim,max9286
+
+  reg:
+    description: I2C device address
+    maxItems: 1
+
+  poc-supply:
+    description: Regulator providing Power over Coax to the cameras
+    maxItems: 1
+
+  enable-gpios:
+    description: GPIO connected to the \#PWDN pin with inverted polarity
+    maxItems: 1
+
+  ports:
+    type: object
+    description: -|
+      The connections to the MAX9286 GMSL and its endpoint nodes are modelled
+      using the OF graph bindings in accordance with the video interface
+      bindings defined in
+      Documentation/devicetree/bindings/media/video-interfaces.txt.
+
+      The following table lists the port number corresponding to each device
+      port.
+
+        Port            Description
+        ----------------------------------------
+        Port 0          GMSL Input 0
+        Port 1          GMSL Input 1
+        Port 2          GMSL Input 2
+        Port 3          GMSL Input 3
+        Port 4          CSI-2 Output
+
+    properties:
+      '#address-cells':
+        const: 1
+
+      '#size-cells':
+        const: 0
+
+      port@[0-3]:
+        type: object
+        properties:
+          reg:
+            enum: [ 0, 1, 2, 3 ]
+
+          endpoint:
+            type: object
+
+            properties:
+              remote-endpoint:
+                description: -|
+                 phandle to the remote GMSL source endpoint subnode in the
+                 remote node port.
+                maxItems: 1
+
+            required:
+              - remote-endpoint
+
+        required:
+          - reg
+          - endpoint
+
+        additionalProperties: false
+
+      port@4:
+        type: object
+        properties:
+          reg:
+            const: 4
+
+          endpoint:
+            type: object
+
+            properties:
+              remote-endpoint:
+                description: phandle to the remote CSI-2 sink endpoint.
+                maxItems: 1
+
+              data-lanes:
+                description: array of physical CSI-2 data lane indexes.
+
+            required:
+              - remote-endpoint
+              - data-lanes
+
+        required:
+          - reg
+          - endpoint
+
+        additionalProperties: false
+
+    required:
+      - port@4
+
+  i2c-mux:
+    type: object
+    description: -|
+      Each GMSL link is modelled as a child bus of an i2c bus
+      multiplexer/switch, in accordance with bindings described in
+      Documentation/devicetree/bindings/i2c/i2c-mux.txt. The serializer
+      device on the remote end of the GMSL link shall be modelled as a child
+      node of the corresponding I2C bus.
+
+    properties:
+      '#address-cells':
+        const: 1
+
+      '#size-cells':
+        const: 0
+
+  additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - ports
+  - i2c-mux
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c@e66d8000 {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      reg = <0 0xe66d8000 0 0x40>;
+
+      gmsl-deserializer@2c {
+        compatible = "maxim,max9286";
+        reg = <0x2c>;
+        poc-supply = <&camera_poc_12v>;
+        enable-gpios = <&gpio 13 GPIO_ACTIVE_HIGH>;
+
+        ports {
+          #address-cells = <1>;
+          #size-cells = <0>;
+
+          port@0 {
+            reg = <0>;
+
+            max9286_in0: endpoint {
+              remote-endpoint = <&rdacm20_out0>;
+            };
+          };
+
+          port@1 {
+            reg = <1>;
+
+            max9286_in1: endpoint {
+              remote-endpoint = <&rdacm20_out1>;
+            };
+          };
+
+          port@2 {
+            reg = <2>;
+
+            max9286_in2: endpoint {
+              remote-endpoint = <&rdacm20_out2>;
+            };
+          };
+
+          port@3 {
+            reg = <3>;
+
+            max9286_in3: endpoint {
+              remote-endpoint = <&rdacm20_out3>;
+            };
+          };
+
+          port@4 {
+            reg = <4>;
+
+            max9286_out: endpoint {
+              data-lanes = <1 2 3 4>;
+              remote-endpoint = <&csi40_in>;
+            };
+          };
+        };
+
+        i2c-mux {
+          #address-cells = <1>;
+          #size-cells = <0>;
+
+          i2c@0 {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            reg = <0>;
+
+            camera@51 {
+              reg = <0x51>;
+
+              port {
+                rdacm20_out0: endpoint {
+                  remote-endpoint = <&max9286_in0>;
+                };
+              };
+
+            };
+          };
+
+          i2c@1 {
+            #address-cells = <1>;
+            #size-cells = <0>;
+            reg = <1>;
+
+            camera@52 {
+              reg = <0x52>;
+
+              port {
+                rdacm20_out1: endpoint {
+                  remote-endpoint = <&max9286_in1>;
+                };
+              };
+            };
+          };
+
+          i2c@2 {
+            #address-cells = <1>;
+            #size-cells = <0>;
+            reg = <2>;
+
+            camera@53 {
+              reg = <0x53>;
+
+              port {
+                rdacm20_out2: endpoint {
+                  remote-endpoint = <&max9286_in2>;
+                };
+              };
+            };
+          };
+
+          i2c@3 {
+            #address-cells = <1>;
+            #size-cells = <0>;
+            reg = <3>;
+
+            camera@54 {
+              reg = <0x54>;
+
+              port {
+                rdacm20_out3: endpoint {
+                  remote-endpoint = <&max9286_in3>;
+                };
+              };
+            };
+          };
+        };
+      };
+    };