This adds device tree bindings for the Gateworks PLD
GPIO chip, a simple I2C GPIO controller.
Cc: devicetree@vger.kernel.org
Cc: Imre Kaloz <kaloz@openwrt.org>
Cc: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
--- /dev/null
+Gateworks PLD GPIO controller bindings
+
+The GPIO controller should be a child node on an I2C bus,
+see: i2c/i2c.txt for details.
+
+Required properties:
+- compatible: Should be "gateworks,pld-gpio"
+- reg: I2C slave address
+- gpio-controller: Marks the device node as a GPIO controller.
+- #gpio-cells: Should be <2>. The first cell is the gpio number and
+ the second cell is used to specify optional parameters.
+
+Example:
+
+pld@56 {
+ compatible = "gateworks,pld-gpio";
+ reg = <0x56>;
+ gpio-controller;
+ #gpio-cells = <2>;
+};