Documentation: mfd: Add DT bindings for the LP873X

The lp873x series of PMICs have a bunch of regulators and a couple
of GPO(General Purpose Outputs).
Add information for the MFD and regulator drivers.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/Documentation/devicetree/bindings/mfd/lp873x.txt b/Documentation/devicetree/bindings/mfd/lp873x.txt
new file mode 100644 (file)
index 0000000..52766c2
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/lp873x.txt
@@ -0,0 +1,59 @@
+TI LP873X PMIC MFD driver
+
+Required properties:
+  - compatible:        "ti,lp8732", "ti,lp8733"
+  - reg:               I2C slave address.
+  - 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.
+Example:
+
+pmic: lp8733@60 {
+       compatible = "ti,lp8733";
+       reg = <0x60>;
+       gpio-controller;
+       #gpio-cells = <2>;
+
+       regulators {
+               lp8733_buck0: buck0 {
+                       regulator-name = "lp8733-buck0";
+                       regulator-min-microvolt = <800000>;
+                       regulator-max-microvolt = <1400000>;
+                       regulator-min-microamp = <1500000>;
+                       regulator-max-microamp = <4000000>;
+                       regulator-ramp-delay = <10000>;
+                       regulator-always-on;
+                       regulator-boot-on;
+               };
+
+               lp8733_buck1: buck1 {
+                       regulator-name = "lp8733-buck1";
+                       regulator-min-microvolt = <800000>;
+                       regulator-max-microvolt = <1400000>;
+                       regulator-min-microamp = <1500000>;
+                       regulator-max-microamp = <4000000>;
+                       regulator-ramp-delay = <10000>;
+                       regulator-boot-on;
+                       regulator-always-on;
+               };
+
+               lp8733_ldo0: ldo0 {
+                       regulator-name = "lp8733-ldo0";
+                       regulator-min-microvolt = <800000>;
+                       regulator-max-microvolt = <3000000>;
+                       regulator-boot-on;
+                       regulator-always-on;
+               };
+
+               lp8733_ldo1: ldo1 {
+                       regulator-name = "lp8733-ldo1";
+                       regulator-min-microvolt = <800000>;
+                       regulator-max-microvolt = <3000000>;
+                       regulator-always-on;
+                       regulator-boot-on;
+               };
+       };
+};