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

Signed-off-by: Guido Günther <a...@sigxcpu.org>
Reviewed-by: Sam Ravnborg <s...@ravnborg.org>
Reviewed-by: Rob Herring <r...@kernel.org>
Reviewed-by: Fabio Estevam <feste...@gmail.com>
---
 .../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..9b23407233c0
--- /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:
+  - "fsl,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:
+       dphy: dphy@30a0030 {
+               compatible = "fsl,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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