Describe the Texas Instruments DS90UB954-Q1, a 2-input video deserializer with I2C Address Translator and remote GPIOs.
Signed-off-by: Luca Ceresoli <[email protected]> --- Changes RFCv1 -> RFCv2: - add explicit aliases for the FPD-link RX ports (optional) - add proper remote GPIO description --- .../bindings/media/i2c/ti,ds90ub954-q1.txt | 194 ++++++++++++++++++ 1 file changed, 194 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/i2c/ti,ds90ub954-q1.txt diff --git a/Documentation/devicetree/bindings/media/i2c/ti,ds90ub954-q1.txt b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub954-q1.txt new file mode 100644 index 000000000000..73ce21ecc3b6 --- /dev/null +++ b/Documentation/devicetree/bindings/media/i2c/ti,ds90ub954-q1.txt @@ -0,0 +1,194 @@ +Texas Instruments DS90UB954-Q1 dual video deserializer +====================================================== + +The TI DS90UB954-Q1 is a MIPI CSI-2 video deserializer that forwards video +streams from up to two FPD-Link 3 connections to a MIPI CSI-2 output. It +also allows access to remote I2C and GPIO. + +Required properties: + + - compatible: must be "ti,ds90ub954-q1" + + - reg: main I2C slave address; optionally aliases for RX port registers + and remote serializers. The main address is mandatory and must be the + first, others are optional and fall back to defaults if not + specified. See "reg-names". + + - reset-gpios: chip reset GPIO, active low (connected to PDB pin of the chip) + - i2c-alias-pool: list of I2C addresses that are known to be available on the + "local" (SoC-to-deser) I2C bus; they will be picked at + runtime and used as aliases to reach remove I2C chips + - gpio-controller + - #gpio-cells: must be 3: FPD-Link 3 RX port number, remote gpio number, flags + +Optional properties: + + - reg-names: names of I2C address used to communicate with the chip, must + match the "reg" values; mandatory if there are 2 or more + addresses + - "main": the main I2C address, used to access shared registers + - "rxport0", "rxport1": I2C alias to access FPD-link RX port specific + registers; must not be used by other slaves on the same bus + - "ser0", "ser1": I2C alias to access the remote serializer connected + on each FPD-link RX port; must not be used by other slaves on the + same bus + - interrupts: interrupt pin from the chip + +Required subnodes: + + - ports: A ports node with one port child node per device input and output + port, in accordance with the video interface bindings defined in + Documentation/devicetree/bindings/media/video-interfaces.txt. The + port nodes are numbered as follows: + + Port Description + ------------------------------------ + 0 Input from FPD-Link 3 RX port 0 + 1 Input from FPD-Link 3 RX port 1 + 2 CSI-2 output + + Each port must have a "remote-chip" subnode that defines the remote + chip (serializer) with at least a "compatible" property + + - i2c-atr: contains one child per RX port, each describes the I2C bus on + the remote side + + Required properties: + - #address-cells = <1>; + - #size-cells = <0>; + + Subnodes: one per each FPD-link RX port, each having: + + Required properties for "i2c-atr" child bus nodes: + - reg: The number of the port where the remove chip is connected + - #address-cells = <1>; + - #size-cells = <0>; + + Optional properties for "i2c-atr" child bus nodes: + - Other properties specific to the remote hardware + - Child nodes conforming to i2c bus binding + + +Device node example +------------------- + +&i2c0 { + deser: deser@3d { + compatible = "ti,ds90ub954-q1"; + reg-names = "main", "rxport0", "rxport1", "ser0", "ser1"; + reg = <0x3d>, <0x40>, <0x41>, <0x44>, <0x45>; + clocks = <&clk_25M>; + interrupt-parent = <&gic>; + interrupts = <3 1 IRQ_TYPE_LEVEL_HIGH>; + reset-gpios = <&gpio_ctl 4 GPIO_ACTIVE_LOW>; + + i2c-alias-pool = /bits/ 16 <0x4a 0x4b 0x4c 0x4d 0x4e 0x4f>; + + gpio-controller; + #gpio-cells = <3>; /* rxport, remote gpio num, flags */ + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + ds90ub954_fpd3_in0: endpoint { + remote-endpoint = <&sensor_0_out>; + }; + }; + + port@1 { + reg = <1>; + ds90ub954_fpd3_in1: endpoint { + remote-endpoint = <&sensor_1_out>; + }; + }; + + port@2 { + reg = <2>; + ds90ub954_mipi_out0: endpoint { + data-lanes = <1 2 3 4>; + /* Actually a REFCLK multiplier */ + data-rate = <1600000000>; + remote-endpoint = <&csirx_0_in>; + }; + }; + }; + + i2c-atr { + #address-cells = <1>; + #size-cells = <0>; + + remote_i2c0: i2c@0 { + reg = <0>; + #address-cells = <1>; + #size-cells = <0>; + }; + + remote_i2c1: i2c@1 { + reg = <1>; + #address-cells = <1>; + #size-cells = <0>; + }; + }; + }; +}; + +&ds90ub954_fpd3_in0 { + remote-chip { + compatible = "ti,ds90ub953-q1"; + gpio-functions = <DS90_GPIO_FUNC_OUTPUT_REMOTE + DS90_GPIO_FUNC_UNUSED + DS90_GPIO_FUNC_UNUSED + DS90_GPIO_FUNC_UNUSED>; + }; +}; + +&ds90ub954_fpd3_in1 { + remote-chip { + compatible = "ti,ds90ub953-q1"; + gpio-functions = <DS90_GPIO_FUNC_OUTPUT_REMOTE + DS90_GPIO_FUNC_UNUSED + DS90_GPIO_FUNC_UNUSED + DS90_GPIO_FUNC_UNUSED>; + }; +}; + +&remote_i2c0 { + sensor_0@3c { + compatible = "sony,imx274"; + reg = <0x3c>; + + reset-gpios = <&deser 0 0 GPIO_ACTIVE_LOW>; + + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + sensor_0_out: endpoint { + remote-endpoint = <&ds90ub954_fpd3_in0>; + }; + }; + }; +}; + +&remote_i2c1 { + sensor_0@3c { + compatible = "sony,imx274"; + reg = <0x3c>; + + reset-gpios = <&deser 1 0 GPIO_ACTIVE_LOW>; + + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + sensor_1_out: endpoint { + remote-endpoint = <&ds90ub954_fpd3_in1>; + }; + }; + }; +}; -- 2.17.1
