Documentation: Add LP3943 DT bindings and document

Bindings for LP3943 MFD, GPIO and PWM controller are added.

Signed-off-by: Milo Kim <milo.kim@ti.com>
Acked-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 37 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/gpio/gpio-lp3943.txt b/Documentation/devicetree/bindings/gpio/gpio-lp3943.txt
new file mode 100644
index 000000000000..80fcb7d70e13
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-lp3943.txt
@@ -0,0 +1,37 @@
+TI/National Semiconductor LP3943 GPIO controller
+
+Required properties:
+  - compatible: "ti,lp3943-gpio"
+  - gpio-controller: Marks the device node as a GPIO controller.
+  - #gpio-cells: Should be 2. See gpio.txt in this directory for a
+                 description of the cells format.
+
+Example:
+Simple LED controls with LP3943 GPIO controller
+
+&i2c4 {
+        lp3943@60 {
+                compatible = "ti,lp3943";
+                reg = <0x60>;
+
+                gpioex: gpio {
+                        compatible = "ti,lp3943-gpio";
+                        gpio-controller;
+                        #gpio-cells = <2>;
+                };
+        };
+};
+
+leds {
+        compatible = "gpio-leds";
+        indicator1 {
+                label = "indi1";
+                gpios = <&gpioex 9 GPIO_ACTIVE_LOW>;
+        };
+
+        indicator2 {
+                label = "indi2";
+                gpios = <&gpioex 10 GPIO_ACTIVE_LOW>;
+                default-state = "off";
+        };
+};