Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / gpio / gpio-clps711x.txt

diff --git a/kernel/Documentation/devicetree/bindings/gpio/gpio-clps711x.txt b/kernel/Documentation/devicetree/bindings/gpio/gpio-clps711x.txt
new file mode 100644 (file)
index 0000000..e0d0446
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/gpio/gpio-clps711x.txt
@@ -0,0 +1,28 @@
+Cirrus Logic CLPS711X GPIO controller
+
+Required properties:
+- compatible: Should be "cirrus,clps711x-gpio"
+- reg: Physical base GPIO controller registers location and length.
+  There should be two registers, first is DATA register, the second
+  is DIRECTION.
+- gpio-controller: Marks the device node as a gpio controller.
+- #gpio-cells: Should be two. The first cell is the pin number and
+  the second cell is used to specify the gpio polarity:
+    0 = active high
+    1 = active low
+
+Note: Each GPIO port should have an alias correctly numbered in "aliases"
+node.
+
+Example:
+
+aliases {
+       gpio0 = &porta;
+};
+
+porta: gpio@80000000 {
+       compatible = "cirrus,clps711x-gpio";
+       reg = <0x80000000 0x1>, <0x80000040 0x1>;
+       gpio-controller;
+       #gpio-cells = <2>;
+};