dts: bindings: wifi: Support SPI for Infineon AIROC driver

Additional bindings to configure SPI support.

Signed-off-by: Steve Boylan <stephen.boylan@beechwoods.com>

dts/bindings/wifi/infineon,airoc-wifi-spi.yaml

@@ -0,0 +1,33 @@
+description: |
+ AIROC Wi-Fi Connectivity over SPI.
+
+compatible: "infineon,airoc-wifi"
+
+include: [spi-device.yaml, "infineon,airoc-wifi.yaml"]
+
+properties:
+ wifi-host-wake-gpios:
+ required: true
+
+ bus-select-gpios:
+ required: true
+ description: |
+ Select bus mode. This gpio must be held low before
+ wifi-reg-on-gpios goes high to select SPI bus mode.
+ type: phandle-array
+
+ spi-half-duplex:
+ description:
+ Use half-duplex communication; if not present, full-
+ duplex operation is assumed.
+ type: boolean
+
+ spi-word-size:
+ description:
+ SPI word size in bits.
+ type: int
+ enum:
+ - 8
+ - 16
+ - 32
+ default: 8