CC devicetree cover letter at https://lore.kernel.org/linux-renesas-soc/20190809040558.10698-1-niklas.soderlund+renesas@xxxxxxxxxxxx/ On Fri, Aug 9, 2019 at 6:07 AM Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx> wrote: > From: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx> > > 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@xxxxxxxxxxxxxxxx> > Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx> > Signed-off-by: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx> > Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx> > Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx> > --- > .../bindings/media/i2c/maxim,max9286.txt | 182 ++++++++++++++++++ > 1 file changed, 182 insertions(+) > create mode 100644 Documentation/devicetree/bindings/media/i2c/maxim,max9286.txt > > diff --git a/Documentation/devicetree/bindings/media/i2c/maxim,max9286.txt b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.txt > new file mode 100644 > index 0000000000000000..afff77a55bb70744 > --- /dev/null > +++ b/Documentation/devicetree/bindings/media/i2c/maxim,max9286.txt > @@ -0,0 +1,182 @@ > +Maxim Integrated Quad GMSL Deserializer > +--------------------------------------- > + > +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. > + > +Required Properties: > + > +- compatible: Shall be "maxim,max9286" > +- reg: I2C device address > + > +Optional Properties: > + > +- poc-supply: Regulator providing Power over Coax to the cameras > +- enable-gpios: GPIO connected to the #PWDN pin with inverted polarity > + > +Required endpoint nodes: > +----------------------- > + > +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 > + > +Optional Endpoint Properties for GMSL Input Ports (Port [0-3]): > + > +- remote-endpoint: phandle to the remote GMSL source endpoint subnode in the > + remote node port. > + > +Required Endpoint Properties for CSI-2 Output Port (Port 4): > + > +- remote-endpoint: phandle to the remote CSI-2 sink endpoint node. > +- data-lanes: array of physical CSI-2 data lane indexes. > + > +Required i2c-mux nodes: > +---------------------- > + > +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. > + > +Required i2c child bus properties: > +- all properties described as required i2c child bus nodes properties in > + Documentation/devicetree/bindings/i2c/i2c-mux.txt. > + > +Example: > +------- > + > + gmsl-deserializer@2c { > + compatible = "maxim,max9286"; > + reg = <0x2c>; > + poc-supply = <&camera_poc_12v>; > + enable-gpios = <&gpio 13 GPIO_ACTIVE_HIGH>; > + > + #address-cells = <1>; > + #size-cells = <0>; > + > + 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@0 { > + #address-cells = <1>; > + #size-cells = <0>; > + reg = <0>; > + > + camera@51 { > + compatible = "imi,rdacm20"; > + reg = <0x51 0x61>; > + > + port { > + rdacm20_out0: endpoint { > + remote-endpoint = <&max9286_in0>; > + }; > + }; > + > + }; > + }; > + > + i2c@1 { > + #address-cells = <1>; > + #size-cells = <0>; > + reg = <1>; > + > + camera@52 { > + compatible = "imi,rdacm20"; > + reg = <0x52 0x62>; > + port { > + rdacm20_out1: endpoint { > + remote-endpoint = <&max9286_in1>; > + }; > + }; > + }; > + }; > + > + i2c@2 { > + #address-cells = <1>; > + #size-cells = <0>; > + reg = <2>; > + > + camera@53 { > + compatible = "imi,rdacm20"; > + reg = <0x53 0x63>; > + port { > + rdacm20_out2: endpoint { > + remote-endpoint = <&max9286_in2>; > + }; > + }; > + }; > + }; > + > + i2c@3 { > + #address-cells = <1>; > + #size-cells = <0>; > + reg = <3>; > + > + camera@54 { > + compatible = "imi,rdacm20"; > + reg = <0x54 0x64>; > + port { > + rdacm20_out3: endpoint { > + remote-endpoint = <&max9286_in3>; > + }; > + }; > + }; > + }; > + }; > -- > 2.22.0 >
