[RFC PATCH 3/3] dt-bindings: pci: xgene pcie device tree bindings

[Tanmay Inamdar]

This patch adds the bindings for X-Gene PCIe driver. The driver resides
under 'drivers/pci/host/pcie-xgene.c' file.

Signed-off-by: Tanmay Inamdar <tinamdar@xxxxxxx>
---
 .../devicetree/bindings/pci/xgene-pcie.txt         |   43 ++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/xgene-pcie.txt

diff --git a/Documentation/devicetree/bindings/pci/xgene-pcie.txt b/Documentation/devicetree/bindings/pci/xgene-pcie.txt
new file mode 100644
index 0000000..d92da4f
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/xgene-pcie.txt
@@ -0,0 +1,43 @@
+* AppliedMicro X-Gene PCIe interface
+
+Required properties:
+- status: Either "ok" or "disabled".
+- device_type: set to "pci"
+- compatible: should contain "xgene,pcie" to identify the core.
+- reg: base addresses and lengths of the pcie controller configuration
+	space register.
+- #address-cells: set to <3>
+- #size-cells: set to <2>
+- ranges: ranges for the PCI memory, I/O regions, config and MSI regions
+- #interrupt-cells: set to <1>
+- interrupt-map-mask and interrupt-map: standard PCI properties
+	to define the mapping of the PCIe interface to interrupt
+	numbers.
+- clocks: from common clock binding: handle to pci clock.
+- clock-names: from common clock binding. Should be "pcieclk".
+
+Example:
+
+SoC specific DT Entry:
+	pcie0: pcie@1f2b0000 {
+		status = "disabled";
+		device_type = "pci";
+		compatible = "xgene,pcie";
+		#interrupt-cells = <1>;
+		#size-cells = <2>;
+		#address-cells = <3>;
+		reg = < 0x00 0x1f2b0000 0x0 0x00010000>;
+		ranges = <0x02000000 0x0 0x00000000 0xe0 0x00000000 0x0 0x10000000 /* mem*/
+			  0x01000000 0x0 0x80000000 0xe0 0x80000000 0x0 0x00010000 /* io */
+			  0x00000000 0x0 0xd0000000 0xe0 0xd0000000 0x0 0x00200000 /* cfg */
+			  0x00000000 0x0 0x79000000 0x00 0x79000000 0x0 0x00800000>; /* msi */
+		interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+		interrupt-map = <0x0 0x0 0x0 0x1 &gic 0x0 0xc2 0x1>;
+		clocks = <&pcie0clk 0>;
+		clock-names = "pcieclk"
+	};
+
+Board specific DT Entry:
+	&pcie0 {
+		status = "ok";
+	};
-- 
1.7.9.5

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