Merge branches 'for-3.7/upstream-fixes', 'for-3.8/hidraw', 'for-3.8/i2c-hid', 'for...

[can-eth-gw-linux.git] / Documentation / devicetree / bindings / gpio / gpio-74x164.txt

diff --git a/Documentation/devicetree/bindings/gpio/gpio-74x164.txt b/Documentation/devicetree/bindings/gpio/gpio-74x164.txt
new file mode 100644 (file)
index 0000000..cc26080
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-74x164.txt
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+* Generic 8-bits shift register GPIO driver
+
+Required properties:
+- compatible : Should be "fairchild,74hc595"
+- reg : chip select number
+- 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
+- registers-number: Number of daisy-chained shift registers
+
+Example:
+
+gpio5: gpio5@0 {
+       compatible = "fairchild,74hc595";
+       reg = <0>;
+       gpio-controller;
+       #gpio-cells = <2>;
+       registers-number = <4>;
+       spi-max-frequency = <100000>;
+};