Add the documentation for the Microsemi Ocelot pinmuxing and gpio
controller.
Cc: Linus Walleij <linus.walleij@xxxxxxxxxx>
Cc: linux-gpio@xxxxxxxxxxxxxxx
Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx>
Acked-by: Rob Herring <robh@xxxxxxxxxx>
---
.../bindings/pinctrl/mscc,ocelot-pinctrl.txt | 39 ++++++++++++++++++++++
1 file changed, 39 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pinctrl/mscc,ocelot-pinctrl.txt
diff --git a/Documentation/devicetree/bindings/pinctrl/mscc,ocelot-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/mscc,ocelot-pinctrl.txt
new file mode 100644
index 000000000000..24a210e0c59a
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/mscc,ocelot-pinctrl.txt
@@ -0,0 +1,39 @@
+Microsemi Ocelot pin controller Device Tree Bindings
+----------------------------------------------------
+
+Required properties:
+ - compatible : Should be "mscc,ocelot-pinctrl"
+ - reg : Address and length of the register set for the device
+ - gpio-controller : Indicates this device is a GPIO controller
+ - #gpio-cells : Must be 2.
+ The first cell is the pin number and the
+ second cell specifies GPIO flags, as defined in
+ <dt-bindings/gpio/gpio.h>.
+ - gpio-ranges : Range of pins managed by the GPIO controller.
+
+
+The ocelot-pinctrl driver uses the generic pin multiplexing and generic pin
+configuration documented in pinctrl-bindings.txt.
+
+The following generic properties are supported:
+ - function
+ - pins
+
+Example:
+ gpio: pinctrl@71070034 {
+ compatible = "mscc,ocelot-pinctrl";
+ reg = <0x71070034 0x28>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ gpio-ranges = <&gpio 0 0 22>;
+
+ uart_pins: uart-pins {
+ pins = "GPIO_6", "GPIO_7";
+ function = "uart";
+ };
+
+ uart2_pins: uart2-pins {
+ pins = "GPIO_12", "GPIO_13";
+ function = "uart2";
+ };
+ };
--
2.15.1
