This patch adds the bindings for X-Gene PCIe driver. The driver resides
under 'drivers/pci/host/pci-xgene.c' file.
Signed-off-by: Tanmay Inamdar <tinamdar@xxxxxxx>
---
.../devicetree/bindings/pci/xgene-pci.txt | 52 ++++++++++++++++++++
1 file changed, 52 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pci/xgene-pci.txt
diff --git a/Documentation/devicetree/bindings/pci/xgene-pci.txt b/Documentation/devicetree/bindings/pci/xgene-pci.txt
new file mode 100644
index 0000000..60e4a54
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/xgene-pci.txt
@@ -0,0 +1,52 @@
+* AppliedMicro X-Gene PCIe interface
+
+Required properties:
+- device_type: set to "pci"
+- compatible: should contain "xgene,pcie" to identify the core.
+- reg: A list of physical base address and length for each set of controller
+ registers. Must contain an entry for each entry in the reg-names
+ property.
+- reg-names: Must include the following entries:
+ "csr": controller configuration registers.
+ "cfg": pcie configuration space registers.
+- #address-cells: set to <3>
+- #size-cells: set to <2>
+- ranges: ranges for the outbound memory, I/O regions.
+- dma-ranges: ranges for the inbound memory 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.
+
+Optional properties:
+- status: Either "ok" or "disabled".
+
+Example:
+
+SoC specific DT Entry:
+ pcie0: pcie@1f2b0000 {
+ status = "disabled";
+ device_type = "pci";
+ compatible = "apm,xgene-pcie";
+ #interrupt-cells = <1>;
+ #size-cells = <2>;
+ #address-cells = <3>;
+ reg = < 0x00 0x1f2b0000 0x0 0x00010000 /* Controller registers */
+ 0xe0 0xd0000000 0x0 0x00200000>; /* PCI config space */
+ reg-names = "csr", "cfg";
+ ranges = <0x01000000 0x00 0x00000000 0xe0 0x00000000 0x00 0x00010000 /* io */
+ 0x02000000 0x00 0x10000000 0xe0 0x10000000 0x00 0x80000000>; /* mem */
+ dma-ranges = <0x42000000 0x40 0x00000000 0x40 0x00000000 0x40 0x00000000>;
+ interrupt-map-mask = <0x0 0x0 0x0 0x7>;
+ interrupt-map = <0x0 0x0 0x0 0x1 &gic 0x0 0xc2 0x1
+ 0x0 0x0 0x0 0x2 &gic 0x0 0xc3 0x1
+ 0x0 0x0 0x0 0x3 &gic 0x0 0xc4 0x1
+ 0x0 0x0 0x0 0x4 &gic 0x0 0xc5 0x1>;
+ clocks = <&pcie0clk 0>;
+ };
+
+Board specific DT Entry:
+ &pcie0 {
+ status = "ok";
+ };
--
1.7.9.5
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