[PATCH] dt-bindings: add device tree binding for Allwinner XR819 SDIO Wi-Fi

[Icenowy Zheng]

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 <icen...@aosc.io>
---
 .../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.
+
+Example:
+
+mmc1: mmc@01c10000 {
+       #address-cells = <1>;
+       #size-cells = <0>;
+
+       pinctrl-names = "default";
+       pinctrl-0 = <&mmc1_pins_a>;
+       vmmc-supply = <&reg_vcc_wifi>;
+       mmc-pwrseq = <&wifi_pwrseq>;
+       bus-width = <4>;
+       non-removable;
+       status = "okay";
+
+       xr819: sdio_wifi@1 {
+               reg = <1>;
+               compatible = "allwinner,xr819";
+               interrupt-parent = <&pio>;
+               interrupts = <6 10 IRQ_TYPE_EDGE_RISING>;
+       };
+};
-- 
2.13.0