The Cadence MIPI-CSI2 RX controller is a CSI2RX bridge that supports up to
4 CSI-2 lanes, and can route the frames to up to 4 streams, depending on
the hardware implementation.
It can operate with an external D-PHY, an internal one or no D-PHY at all
in some configurations.
Signed-off-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>
---
.../devicetree/bindings/media/cdns-csi2rx.txt | 87 ++++++++++++++++++++++
1 file changed, 87 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/cdns-csi2rx.txt
diff --git a/Documentation/devicetree/bindings/media/cdns-csi2rx.txt b/Documentation/devicetree/bindings/media/cdns-csi2rx.txt
new file mode 100644
index 000000000000..b5bcb6ad18fc
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/cdns-csi2rx.txt
@@ -0,0 +1,87 @@
+Cadence CSI2RX controller
+=========================
+
+The Cadence CSI2RX controller is a CSI-2 bridge supporting up to 4 CSI
+lanes in input, and 4 different pixel streams in output.
+
+Required properties:
+ - compatible: must be set to "cdns,csi2rx"
+ - reg: base address and size of the memory mapped region
+ - clocks: phandles to the clocks driving the controller
+ - clock-names: must contain:
+ * sys_clk: main clock
+ * p_clk: register bank clock
+ * p_free_clk: free running register bank clock
+ * pixel_ifX_clk: pixel stream output clock, one for each stream
+ implemented in hardware, between 0 and 3
+ * dphy_rx_clk: D-PHY byte clock, if implemented in hardware
+ - phys: phandle to the external D-PHY
+ - phy-names: must contain dphy, if the implementation uses an
+ external D-PHY
+
+Required subnodes:
+ - ports: A ports node with endpoint definitions as defined in
+ Documentation/devicetree/bindings/media/video-interfaces.txt. The
+ first port subnode should be the input endpoint, the second one the
+ outputs
+
+ The output port should have as many endpoints as stream supported by
+ the hardware implementation, between 1 and 4, their ID being the
+ stream output number used in the implementation.
+
+Example:
+
+csi2rx: csi-bridge@0d060000 {
+ compatible = "cdns,csi2rx";
+ reg = <0x0d060000 0x1000>;
+ clocks = <&byteclock>, <&byteclock>, <&byteclock>,
+ <&coreclock>, <&coreclock>,
+ <&coreclock>, <&coreclock>;
+ clock-names = "sys_clk", "p_clk", "p_free_clk",
+ "pixel_if0_clk", "pixel_if1_clk",
+ "pixel_if2_clk", "pixel_if3_clk";
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0>;
+
+ csi2rx_in_sensor: endpoint@0 {
+ reg = <0>;
+ remote-endpoint = <&sensor_out_csi2rx>;
+ clock-lanes = <0>;
+ data-lanes = <1 2>;
+ };
+ };
+
+ port@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <1>;
+
+ csi2rx_out_grabber0: endpoint@0 {
+ reg = <0>;
+ remote-endpoint = <&grabber0_in_csi2rx>;
+ };
+
+ csi2rx_out_grabber1: endpoint@1 {
+ reg = <1>;
+ remote-endpoint = <&grabber1_in_csi2rx>;
+ };
+
+ csi2rx_out_grabber2: endpoint@2 {
+ reg = <2>;
+ remote-endpoint = <&grabber2_in_csi2rx>;
+ };
+
+ csi2rx_out_grabber3: endpoint@3 {
+ reg = <3>;
+ remote-endpoint = <&grabber3_in_csi2rx>;
+ };
+ };
+ };
+};
--
2.13.0
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