[PATCH v4 2/3] dt-bindings: phy: Add documentation for mixel dphy

["Guido Günther" <agx@sigxcpu.org>]

Add support for the MIXEL DPHY IP as found in the NXP's i.MX8MQ.

Signed-off-by: Guido Günther <agx@sigxcpu.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
---
 .../bindings/phy/mixel,mipi-dsi-phy.txt       | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/mixel,mipi-dsi-phy.txt

diff --git a/Documentation/devicetree/bindings/phy/mixel,mipi-dsi-phy.txt b/Documentation/devicetree/bindings/phy/mixel,mipi-dsi-phy.txt
new file mode 100644
index 000000000000..d3646580412a
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/mixel,mipi-dsi-phy.txt
@@ -0,0 +1,29 @@
+Mixel DSI PHY for i.MX8
+
+The Mixel MIPI-DSI PHY IP block is e.g. found on i.MX8 platforms (along the
+MIPI-DSI IP from Northwest Logic). It represents the physical layer for the
+electrical signals for DSI.
+
+Required properties:
+- compatible: Must be:
+  - "mixel,imx8mq-mipi-dphy"
+- clocks: Must contain an entry for each entry in clock-names.
+- clock-names: Must contain the following entries:
+  - "phy_ref": phandle and specifier referring to the DPHY ref clock
+- reg: the register range of the PHY controller
+- #phy-cells: number of cells in PHY, as defined in
+  Documentation/devicetree/bindings/phy/phy-bindings.txt
+  this must be <0>
+
+Optional properties:
+- power-domains: phandle to power domain
+
+Example:
+	mipi_dphy: mipi_dphy@30A0030 {
+		compatible = "mixel,imx8mq-mipi-dphy";
+		clocks = <&clk IMX8MQ_CLK_DSI_PHY_REF>;
+		clock-names = "phy_ref";
+		reg = <0x30A00300 0x100>;
+		power-domains = <&pd_mipi0>;
+		#phy-cells = <0>;
+        };
-- 
2.20.1


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