This commit adds the documentation for the Device Tree binding used to
describe the Aardvark PCIe controller, found on Marvell Armada 3700
ARM64 SoCs.

Signed-off-by: Thomas Petazzoni <redacted>
---
 .../devicetree/bindings/pci/aardvark-pci.txt       | 56 ++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/aardvark-pci.txt

diff --git a/Documentation/devicetree/bindings/pci/aardvark-pci.txt b/Documentation/devicetree/bindings/pci/aardvark-pci.txt
new file mode 100644
index 0000000..683830d
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/aardvark-pci.txt

@@ -0,0 +1,56 @@
+Aardvark PCIe controller
+
+This PCIe controller is used on the Marvell Armada 3700 ARM64 SoC.
+
+The Device Tree node describing an Aardvark PCIe controller must
+contain the following properties:
+
+ - compatible: Should be "marvell,armada-3700-pcie"
+ - reg: range of registers for the PCIe controller
+ - interrupts: the interrupt line of the PCIe controller
+ - #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
+ - #interrupt-cells: set to <1>
+ - msi-controller: indicates that the PCIe controller can itself
+   handled MSI interrupts