PCI: Add DT binding for Sigma Designs Tango PCIe controller

Binding for the Sigma Designs SMP8759 SoC.

Signed-off-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rob Herring <robh@kernel.org>

diff --git a/Documentation/devicetree/bindings/pci/tango-pcie.txt b/Documentation/devicetree/bindings/pci/tango-pcie.txt
new file mode 100644 (file)
index 0000000..2446838
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/tango-pcie.txt
@@ -0,0 +1,29 @@
+Sigma Designs Tango PCIe controller
+
+Required properties:
+
+- compatible: "sigma,smp8759-pcie"
+- reg: address/size of PCI configuration space, address/size of register area
+- bus-range: defined by size of PCI configuration space
+- device_type: "pci"
+- #size-cells: <2>
+- #address-cells: <3>
+- msi-controller
+- ranges: translation from system to bus addresses
+- interrupts: spec for misc interrupts, spec for MSI
+
+Example:
+
+       pcie@2e000 {
+               compatible = "sigma,smp8759-pcie";
+               reg = <0x50000000 0x400000>, <0x2e000 0x100>;
+               bus-range = <0 3>;
+               device_type = "pci";
+               #size-cells = <2>;
+               #address-cells = <3>;
+               msi-controller;
+               ranges = <0x02000000 0x0 0x00400000  0x50400000  0x0 0x3c00000>;
+               interrupts =
+                       <54 IRQ_TYPE_LEVEL_HIGH>, /* misc interrupts */
+                       <55 IRQ_TYPE_LEVEL_HIGH>; /* MSI */
+       };