Allwinner XR819 is a SDIO Wi-Fi chip, which has the functionality to use
an out-of-band interrupt pin instead of SDIO in-band interrupt.

Add the device tree binding of this chip, in order to make it possible
to add this interrupt pin to device trees.

Signed-off-by: Icenowy Zheng <redacted>
---
 .../bindings/net/wireless/allwinner,xr819.txt      | 37 ++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/wireless/allwinner,xr819.txt

diff --git
a/Documentation/devicetree/bindings/net/wireless/allwinner,xr819.txt
b/Documentation/devicetree/bindings/net/wireless/allwinner,xr819.txt
new file mode 100644
index 000000000000..64dd9c1c0584

--- /dev/null
+++ b/Documentation/devicetree/bindings/net/wireless/allwinner,xr819.txt

@@ -0,0 +1,37 @@
+Allwinner XRadio wireless SDIO devices
+
+This node provides properties for controlling the XRadio wireless device. The
+node is expected to be specified as a child node to the SDIO controller that
+connects the device to the system.
+
+Required properties:
+
+ - compatible : Should be "allwinner,xr819".
+
+Optional properties:
+ - interrupt-parent : the phandle for the interrupt controller to which the
+	device interrupts are connected.
+ - interrupts : specifies attributes for the out-of-band interrupt (host-wake).
+	When not specified the device will use in-band SDIO interrupts.