[PATCH 1/2] Documentation: bindings: add dt documentation for Rockchip PCIe PHY

[Shawn Lin <shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>]

This patch adds a binding that describes the Rockchip PCIe PHY
found on Rockchip SoCs PCIe interface.

Signed-off-by: Shawn Lin <shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
---

 .../devicetree/bindings/phy/rockchip-pcie-phy.txt  | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/rockchip-pcie-phy.txt

diff --git a/Documentation/devicetree/bindings/phy/rockchip-pcie-phy.txt b/Documentation/devicetree/bindings/phy/rockchip-pcie-phy.txt
new file mode 100644
index 0000000..ba8c406
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/rockchip-pcie-phy.txt
@@ -0,0 +1,22 @@
+Rockchip PCIE PHY
+-----------------------
+
+Required properties:
+ - compatible: rockchip,rk3399-pcie-phy
+ - #phy-cells: must be 0
+
+Example:
+
+grf: syscon@ff770000 {
+	compatible = "rockchip,rk3399-grf", "syscon", "simple-mfd";
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	...
+
+	pcie_phy: phy@e220 {
+		compatible = "rockchip,rk3399-pcie-phy";
+		#phy-cells = <0>;
+	};
+};
+
-- 
2.3.7


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