mfd: wm831x: Add device tree binding document

Add a device tree binding document for the wm831x series of PMICs.
Currently only support for the registering the device and the GPIOs are
actually implemented in the driver.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/Documentation/devicetree/bindings/mfd/wm831x.txt b/Documentation/devicetree/bindings/mfd/wm831x.txt
new file mode 100644 (file)
index 0000000..9f8b743
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/wm831x.txt
@@ -0,0 +1,81 @@
+Cirrus Logic/Wolfson Microelectronics wm831x PMICs
+
+System PMICs with a wide range of additional features.
+
+Required properties:
+
+  - compatible : One of the following chip-specific strings:
+        "wlf,wm8310"
+        "wlf,wm8311"
+        "wlf,wm8312"
+        "wlf,wm8320"
+        "wlf,wm8321"
+        "wlf,wm8325"
+        "wlf,wm8326"
+
+  - reg : I2C slave address when connected using I2C, chip select number
+    when using SPI.
+
+  - 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 is used to specify optional parameters (currently unused).
+
+  - interrupts : The interrupt line the IRQ signal for the device is
+    connected to.
+  - interrupt-parent : The parent interrupt controller.
+
+  - interrupt-controller : wm831x devices contain interrupt controllers and
+    may provide interrupt services to other devices.
+  - #interrupt-cells: Must be 2. The first cell is the IRQ number, and the
+    second cell is the flags, encoded as the trigger masks from
+    ../interrupt-controller/interrupts.txt
+
+Optional sub-nodes:
+  - regulators : Contains sub-nodes for each of the regulators supplied by
+    the device. The regulators are bound using their names listed below:
+
+    dcdc1 : DCDC1
+    dcdc2 : DCDC2
+    dcdc3 : DCDC3
+    dcdc4 : DCDC3
+    isink1 : ISINK1
+    isink2 : ISINK2
+    ldo1 : LDO1
+    ldo2 : LDO2
+    ldo3 : LDO3
+    ldo4 : LDO4
+    ldo5 : LDO5
+    ldo7 : LDO7
+    ldo11 : LDO11
+
+    The bindings details of each regulator can be found in:
+    ../regulator/regulator.txt
+
+Example:
+
+wm8310: pmic@36 {
+       compatible = "wlf,wm8310";
+       reg = <0x36>;
+
+       gpio-controller;
+       #gpio-cells = <2>;
+
+       interrupts = <347>;
+       interrupt-parent = <&gic>;
+
+       interrupt-controller;
+       #interrupt-cells = <2>;
+
+       regulators {
+               dcdc1: dcdc1 {
+                       regulator-name = "DCDC1";
+                       regulator-min-microvolt = <600000>;
+                       regulator-max-microvolt = <600000>;
+               };
+               ldo1: ldo1 {
+                       regulator-name = "LDO1";
+                       regulator-min-microvolt = <1700000>;
+                       regulator-max-microvolt = <1700000>;
+               };
+       };
+};

diff --git a/MAINTAINERS b/MAINTAINERS
index c265a5fe48481f548629079cb529137e0a377f31..dfe761bb49984f0c501b83a64d168d5bb82f4b43 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -13600,6 +13600,7 @@ F:      Documentation/hwmon/wm83??
 F:     Documentation/devicetree/bindings/extcon/extcon-arizona.txt
 F:     Documentation/devicetree/bindings/regulator/arizona-regulator.txt
 F:     Documentation/devicetree/bindings/mfd/arizona.txt
+F:     Documentation/devicetree/bindings/mfd/wm831x.txt
 F:     arch/arm/mach-s3c64xx/mach-crag6410*
 F:     drivers/clk/clk-wm83*.c
 F:     drivers/extcon/extcon-arizona.c