[PATCH v3 2/2] dt-bindings: max3421: Add bindings documentation

[Jules Maselbas <jules.maselbas-l+/54qjP3hgoQXW8ST3Jvw@public.gmane.org>]

Adds bindings documentation for the max3421 driver.

Signed-off-by: Jules Maselbas <jules.maselbas-l+/54qjP3hgoQXW8ST3Jvw@public.gmane.org>
Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
---
 .../devicetree/bindings/usb/maxim,max3421.txt      | 25 ++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/usb/maxim,max3421.txt

diff --git a/Documentation/devicetree/bindings/usb/maxim,max3421.txt b/Documentation/devicetree/bindings/usb/maxim,max3421.txt
new file mode 100644
index 000000000000..5c699e52ce3f
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/maxim,max3421.txt
@@ -0,0 +1,25 @@
+Maxim Integrated SPI-based USB 2.0 host controller MAX3421E
+
+Required properties:
+ - compatible: Should be "maxim,max3421"
+ - spi-max-frequency: maximum frequency for this device must not exceed 26 MHz.
+ - reg: chip select number to which this device is connected.
+ - maxim,vbus-en-pin: <GPOUTx ACTIVE_LEVEL>
+   GPOUTx is the number (1-8) of the GPOUT pin of MAX3421E to drive Vbus.
+   ACTIVE_LEVEL is 0 or 1.
+ - interrupts: the interrupt line description for the interrupt controller.
+   The driver configures MAX3421E for active low level triggered interrupts,
+   configure your interrupt line accordingly.
+
+Optional property:
+ - interrupt-parent: the phandle to the associated interrupt controller.
+
+Example:
+	usb@0 {
+		compatible = "maxim,max3421";
+		reg = <0>;
+		maxim,vbus-en-pin = <3 1>;
+		spi-max-frequency = <26000000>;
+		interrupt-parent = <&PIC>;
+		interrupts = <42>;
+	};
-- 
2.14.2

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