Add DT bindings for Maxim MAX96714 GMSL2 Deserializer. Reviewed-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx> Signed-off-by: Julien Massot <julien.massot@xxxxxxxxxxxxx> --- Change since v6: - Remove 'bus-type' serializer property in the example Change since v5: - Reverse the fallback MAX96714 can fallback to MAX96714F - Use const instead of enum for MAX96714F compatible Change since v4: - Add compatible for MAX96714 and use it as a fallback for MAX96714F - Remove extra '|' for decriptions - Reference 'i2c-gate' instead of 'i2c-controller' Change since v3: - Renamed file to maxim,max96714.yaml dropped the 'f' suffix - Removed mention to C-PHY since it's not supported by MAX96714 deserializers - Removed bus-type requirement on CSI endpoint since the device only support D-PHY - Removed the clock-lanes property in the dt example Change since v2: - remove reg description - rename enable gpio to powerdown - use generic node name: i2c, serializer, deserializer --- .../bindings/media/i2c/maxim,max96714.yaml | 174 ++++++++++++++++++ 1 file changed, 174 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/i2c/maxim,max96714.yaml diff --git a/Documentation/devicetree/bindings/media/i2c/maxim,max96714.yaml b/Documentation/devicetree/bindings/media/i2c/maxim,max96714.yaml new file mode 100644 index 000000000000..3ace50e11921 --- /dev/null +++ b/Documentation/devicetree/bindings/media/i2c/maxim,max96714.yaml @@ -0,0 +1,174 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +# Copyright (C) 2024 Collabora Ltd. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/media/i2c/maxim,max96714.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Maxim MAX96714 GMSL2 to CSI-2 Deserializer + +maintainers: + - Julien Massot <julien.massot@xxxxxxxxxxxxx> + +description: + The MAX96714 deserializer converts GMSL2 serial inputs into MIPI + CSI-2 D-PHY formatted output. The device allows the GMSL2 link to + simultaneously transmit bidirectional control-channel data while forward + video transmissions are in progress. The MAX96714 can connect to one + remotely located serializer using industry-standard coax or STP + interconnects. The device cans operate in pixel or tunnel mode. In pixel mode + the MAX96714 can select individual video stream, while the tunnel mode forward all + the MIPI data received by the serializer. + + The GMSL2 serial link operates at a fixed rate of 3Gbps or 6Gbps in the + forward direction and 187.5Mbps in the reverse direction. + MAX96714F only supports a fixed rate of 3Gbps in the forward direction. + +properties: + compatible: + oneOf: + - const: maxim,max96714f + - items: + - enum: + - maxim,max96714 + - const: maxim,max96714f + + reg: + maxItems: 1 + + powerdown-gpios: + maxItems: 1 + description: + Specifier for the GPIO connected to the PWDNB pin. + + ports: + $ref: /schemas/graph.yaml#/properties/ports + + properties: + port@0: + $ref: /schemas/graph.yaml#/properties/port + unevaluatedProperties: false + description: GMSL Input + properties: + endpoint: + $ref: /schemas/media/video-interfaces.yaml# + unevaluatedProperties: false + description: + Endpoint for GMSL2-Link port. + + port@1: + $ref: /schemas/graph.yaml#/$defs/port-base + unevaluatedProperties: false + description: CSI-2 Output port + + properties: + endpoint: + $ref: /schemas/media/video-interfaces.yaml# + unevaluatedProperties: false + + properties: + data-lanes: + minItems: 1 + maxItems: 4 + + lane-polarities: + minItems: 1 + maxItems: 5 + + link-frequencies: + maxItems: 1 + + required: + - data-lanes + + required: + - port@1 + + i2c-gate: + $ref: /schemas/i2c/i2c-gate.yaml + unevaluatedProperties: false + description: + The MAX96714 will pass through and forward the I2C requests from the + incoming I2C bus over the GMSL2 link. Therefore it supports an i2c-gate + subnode to configure a serializer. + + port0-poc-supply: + description: Regulator providing Power over Coax for the GMSL port + +required: + - compatible + - reg + - ports + +additionalProperties: false + +examples: + - | + #include <dt-bindings/gpio/gpio.h> + #include <dt-bindings/media/video-interfaces.h> + + i2c { + #address-cells = <1>; + #size-cells = <0>; + + deserializer@28 { + compatible = "maxim,max96714f"; + reg = <0x28>; + powerdown-gpios = <&main_gpio0 37 GPIO_ACTIVE_LOW>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + port@0 { + reg = <0>; + max96714_gmsl_in: endpoint { + remote-endpoint = <&max96917f_gmsl_out>; + }; + }; + + port@1 { + reg = <1>; + max96714_csi_out: endpoint { + data-lanes = <1 2 3 4>; + link-frequencies = /bits/ 64 <400000000>; + remote-endpoint = <&csi_in>; + }; + }; + }; + + i2c-gate { + #address-cells = <1>; + #size-cells = <0>; + + serializer@40 { + compatible = "maxim,max96717f"; + reg = <0x40>; + gpio-controller; + #gpio-cells = <2>; + #clock-cells = <0>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + max96717f_csi_in: endpoint { + data-lanes = <1 2>; + lane-polarities = <1 0 1>; + remote-endpoint = <&sensor_out>; + }; + }; + + port@1 { + reg = <1>; + max96917f_gmsl_out: endpoint { + remote-endpoint = <&max96714_gmsl_in>; + }; + }; + }; + }; + }; + }; + }; +... -- 2.44.0
