linux-kernel - [PATCH v1 1/3] dt-bindings: Document MIPID02 bindings

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Date:   Tue, 12 Mar 2019 07:44:03 +0100
From:   Mickael Guene <mickael.guene@...com>
To:     <linux-media@...r.kernel.org>
CC:     Mickael Guene <mickael.guene@...com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        "Mark Rutland" <mark.rutland@....com>
Subject: [PATCH v1 1/3] dt-bindings: Document MIPID02 bindings

This adds documentation of device tree for MIPID02 CSI-2 to PARALLEL
bridge.

Signed-off-by: Mickael Guene <mickael.guene@...com>
---

 .../bindings/media/i2c/st,st-mipid02.txt           | 69 ++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/i2c/st,st-mipid02.txt

diff --git a/Documentation/devicetree/bindings/media/i2c/st,st-mipid02.txt b/Documentation/devicetree/bindings/media/i2c/st,st-mipid02.txt
new file mode 100644
index 0000000..a1855da
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/st,st-mipid02.txt
@@ -0,0 +1,69 @@
+STMicroelectronics MIPID02 CSI-2 to PARALLEL bridge
+
+MIPID02 has two CSI-2 input ports, only one of those ports can be active at a
+time. Active port input stream will be de-serialized and its content outputted
+through PARALLEL output port.
+CSI-2 first input port is a dual lane 800Mbps whereas CSI-2 second input port is
+a single lane 800Mbps. Both ports support clock and data lane polarity swap.
+First port also supports data lane swap.
+PARALLEL output port has a maximum width of 12 bits.
+Supported formats are RAW6, RAW7, RAW8, RAW10, RAW12, RGB565, RGB888, RGB444,
+YUV420 8-bit, YUV422 8-bit and YUV420 10-bit.
+
+Required Properties:
+- compatible: should be "st,st-mipid02"
+- clocks: reference to the xclk input clock.
+- clock-names: should be "xclk".
+- VDDE-supply: sensor digital IO supply. Must be 1.8 volts.
+- VDDIN-supply: sensor internal regulator supply. Must be 1.8 volts.
+
+Optional Properties:
+- reset-gpios: reference to the GPIO connected to the xsdn pin, if any.
+	       This is an active low signal to the mipid02.
+
+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    CSI-2 first input port
+	   1    CSI-2 second input port
+	   2    PARALLEL output
+
+Example:
+
+mipid02: mipid02@14 {
+	compatible = "st,st-mipid02";
+	reg = <0x14>;
+	status = "okay";
+	clocks = <&clk_ext_camera_12>;
+	clock-names = "xclk";
+	VDDE-supply = <&vdd>;
+	VDDIN-supply = <&vdd>;
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		port@0 {
+			reg = <0>;
+
+			ep0: endpoint {
+				clock-lanes = <0>;
+				data-lanes = <1 2>;
+				remote-endpoint = <&mipi_csi2_in>;
+			};
+		};
+		port@2 {
+			reg = <2>;
+
+			ep2: endpoint {
+				bus-width = <8>;
+				hsync-active = <0>;
+				vsync-active = <0>;
+				remote-endpoint = <&parallel_out>;
+			};
+		};
+	};
+};
-- 
2.7.4