mfd: Add ROHM BD9571MWV-M PMIC DT bindings

Add DT bindings for the ROHM BD9571MWV-M PMIC. This PMIC has
the following features:
- multiple voltage monitors for 1V8, 2V5, 3V3 voltage rail
- one voltage regulator for DVFS
- two GPIOs

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/Documentation/devicetree/bindings/mfd/bd9571mwv.txt b/Documentation/devicetree/bindings/mfd/bd9571mwv.txt
new file mode 100644 (file)
index 0000000..9ab216a
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/bd9571mwv.txt
@@ -0,0 +1,49 @@
+* ROHM BD9571MWV Power Management Integrated Circuit (PMIC) bindings
+
+Required properties:
+ - compatible          : Should be "rohm,bd9571mwv".
+ - reg                 : I2C slave address.
+ - interrupt-parent    : Phandle to the parent interrupt controller.
+ - interrupts          : The interrupt line the device is connected to.
+ - interrupt-controller        : Marks the device node as an interrupt controller.
+ - #interrupt-cells    : The number of cells to describe an IRQ, should be 2.
+                           The first cell is the IRQ number.
+                           The second cell is the flags, encoded as trigger
+                           masks from ../interrupt-controller/interrupts.txt.
+ - gpio-controller      : Marks the device node as a GPIO Controller.
+ - #gpio-cells          : Should be two.  The first cell is the pin number and
+                            the second cell is used to specify flags.
+                            See ../gpio/gpio.txt for more information.
+ - regulators:          : List of child nodes that specify the regulator
+                            initialization data. Child nodes must be named
+                            after their hardware counterparts:
+                            - vd09
+                            - vd18
+                            - vd25
+                            - vd33
+                            - dvfs
+                           Each child node is defined using the standard
+                           binding for regulators.
+
+Example:
+
+       pmic: pmic@30 {
+               compatible = "rohm,bd9571mwv";
+               reg = <0x30>;
+               interrupt-parent = <&gpio2>;
+               interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+               interrupt-controller;
+               #interrupt-cells = <2>;
+               gpio-controller;
+               #gpio-cells = <2>;
+
+               regulators {
+                       dvfs: dvfs {
+                               regulator-name = "dvfs";
+                               regulator-min-microvolt = <750000>;
+                               regulator-max-microvolt = <1030000>;
+                               regulator-boot-on;
+                               regulator-always-on;
+                       };
+               };
+       };