From: chenjh <redacted>

Add device tree bindings documentation for Rockchip's RK805 PMIC

Signed-off-by: chenjh <redacted>
---
 .../devicetree/bindings/gpio/gpio-rk805.txt        | 37 ++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/gpio-rk805.txt

diff --git a/Documentation/devicetree/bindings/gpio/gpio-rk805.txt b/Documentation/devicetree/bindings/gpio/gpio-rk805.txt
new file mode 100644
index 0000000..98b75fa
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-rk805.txt

@@ -0,0 +1,37 @@
+RK805 GPIO controller
+
+This driver follows the usual GPIO bindings found in
+Documentation/devicetree/bindings/gpio/gpio.txt
+
+Required properties:
+- #gpio-cells: Should be two. The first cell is the pin number and the
+  second is the GPIO flags.
+- gpio-controller: Marks the device node as a GPIO controller.
+
+These properties must be added in the RK805 PMIC node, documented in
+Documentation/devicetree/bindings/mfd/rk808.txt
+
+Example:
+
+rk805: pmic@18 {
+	compatible = "rockchip,rk808";
+	clock-output-names = "xin32k", "rk808-clkout2";
+	interrupt-parent = <&gpio0>;
+	interrupts = <4 IRQ_TYPE_LEVEL_LOW>;
+	reg = <0x1a>;
+	rockchip,system-power-controller;
+	wakeup-source;
+	#clock-cells = <1>;
+	...
+	gpio-controller;
+	#gpio-cells = <2>;
+};
+
+
+Example of a peripheral using the PMIC GPIOs:
+
+wireless-bluetooth {
+		compatible = "bluetooth-platdata";