PCI: iproc: Add DT docs for Broadcom iProc PCIe driver

Document the Broadcom iProc PCIe platform interface device tree binding.

Signed-off-by: Ray Jui <rjui@broadcom.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>

diff --git a/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt b/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
new file mode 100644 (file)
index 0000000..f7ce50e
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+++ b/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
@@ -0,0 +1,63 @@
+* Broadcom iProc PCIe controller with the platform bus interface
+
+Required properties:
+- compatible: Must be "brcm,iproc-pcie"
+- reg: base address and length of the PCIe controller I/O register space
+- #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
+- linux,pci-domain: PCI domain ID. Should be unique for each host controller
+- bus-range: PCI bus numbers covered
+- #address-cells: set to <3>
+- #size-cells: set to <2>
+- device_type: set to "pci"
+- ranges: ranges for the PCI memory and I/O regions
+
+Optional properties:
+- phys: phandle of the PCIe PHY device
+- phy-names: must be "pcie-phy"
+
+Example:
+       pcie0: pcie@18012000 {
+               compatible = "brcm,iproc-pcie";
+               reg = <0x18012000 0x1000>;
+
+               #interrupt-cells = <1>;
+               interrupt-map-mask = <0 0 0 0>;
+               interrupt-map = <0 0 0 0 &gic GIC_SPI 100 IRQ_TYPE_NONE>;
+
+               linux,pci-domain = <0>;
+
+               bus-range = <0x00 0xff>;
+
+               #address-cells = <3>;
+               #size-cells = <2>;
+               device_type = "pci";
+               ranges = <0x81000000 0 0          0x28000000 0 0x00010000
+                         0x82000000 0 0x20000000 0x20000000 0 0x04000000>;
+
+               phys = <&phy 0 5>;
+               phy-names = "pcie-phy";
+       };
+
+       pcie1: pcie@18013000 {
+               compatible = "brcm,iproc-pcie";
+               reg = <0x18013000 0x1000>;
+
+               #interrupt-cells = <1>;
+               interrupt-map-mask = <0 0 0 0>;
+               interrupt-map = <0 0 0 0 &gic GIC_SPI 106 IRQ_TYPE_NONE>;
+
+               linux,pci-domain = <1>;
+
+               bus-range = <0x00 0xff>;
+
+               #address-cells = <3>;
+               #size-cells = <2>;
+               device_type = "pci";
+               ranges = <0x81000000 0 0          0x48000000 0 0x00010000
+                         0x82000000 0 0x40000000 0x40000000 0 0x04000000>;
+
+               phys = <&phy 1 6>;
+               phy-names = "pcie-phy";
+       };