[PATCH 1/2] gpio: Add DT bindings for Gateworks PLD GPIO

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

This adds device tree bindings for the Gateworks PLD
GPIO chip, a simple I2C GPIO controller.

Cc: devicetree@xxxxxxxxxxxxxxx
Cc: Imre Kaloz <kaloz@xxxxxxxxxxx>
Cc: Tim Harvey <tharvey@xxxxxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
 .../bindings/gpio/gateworks,pld-gpio.txt      | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/gateworks,pld-gpio.txt

diff --git a/Documentation/devicetree/bindings/gpio/gateworks,pld-gpio.txt b/Documentation/devicetree/bindings/gpio/gateworks,pld-gpio.txt
new file mode 100644
index 000000000000..6e81f8b755c5
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gateworks,pld-gpio.txt
@@ -0,0 +1,20 @@
+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>;
+};
-- 
2.20.1