Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / extcon / extcon-rt8973a.txt

diff --git a/kernel/Documentation/devicetree/bindings/extcon/extcon-rt8973a.txt b/kernel/Documentation/devicetree/bindings/extcon/extcon-rt8973a.txt
new file mode 100644 (file)
index 0000000..6dede7d
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/extcon/extcon-rt8973a.txt
@@ -0,0 +1,25 @@
+
+* Richtek RT8973A - Micro USB Switch device
+
+The Richtek RT8973A is Micro USB Switch with OVP and I2C interface. The RT8973A
+is a USB port accessory detector and switch that is optimized to protect low
+voltage system from abnormal high input voltage (up to 28V) and supports high
+speed USB operation. Also, RT8973A support 'auto-configuration' mode.
+If auto-configuration mode is enabled, RT8973A would control internal h/w patch
+for USB D-/D+ switching.
+
+Required properties:
+- compatible: Should be "richtek,rt8973a-muic"
+- reg: Specifies the I2C slave address of the MUIC block. It should be 0x14
+- interrupt-parent: Specifies the phandle of the interrupt controller to which
+  the interrupts from rt8973a are delivered to.
+- interrupts: Interrupt specifiers for detection interrupt sources.
+
+Example:
+
+       rt8973a@14 {
+               compatible = "richtek,rt8973a-muic";
+               interrupt-parent = <&gpx1>;
+               interrupts = <5 0>;
+               reg = <0x14>;
+       };