regulator: Add DT bindings for max77802 PMIC regulators

Add Device Tree binding documentation for the regulators
present in the Maxim 77802 Power Management IC.

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/Documentation/devicetree/bindings/regulator/max77802.txt b/Documentation/devicetree/bindings/regulator/max77802.txt
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+Binding for Maxim MAX77802 regulators
+
+This is a part of device tree bindings of MAX77802 multi-function device.
+More information can be found in bindings/mfd/max77802.txt file.
+
+The MAX77802 PMIC has 10 high-efficiency Buck and 32 Low-dropout (LDO)
+regulators that can be controlled over I2C.
+
+Following properties should be present in main device node of the MFD chip.
+
+Optional node:
+- regulators : The regulators of max77802 have to be instantiated
+  under subnode named "regulators" using the following format.
+
+       regulator-name {
+               standard regulator constraints....
+       };
+       refer Documentation/devicetree/bindings/regulator/regulator.txt
+
+The regulator node name should be initialized with a string to get matched
+with their hardware counterparts as follow. The valid names are:
+
+       -LDOn   :       for LDOs, where n can lie in ranges 1-15, 17-21, 23-30
+                       and 32-35.
+                       example: LDO1, LDO2, LDO35.
+       -BUCKn  :       for BUCKs, where n can lie in range 1 to 10.
+                       example: BUCK1, BUCK5, BUCK10.
+Example:
+
+       max77802@09 {
+               compatible = "maxim,max77802";
+               interrupt-parent = <&wakeup_eint>;
+               interrupts = <26 0>;
+               reg = <0x09>;
+               #address-cells = <1>;
+               #size-cells = <0>;
+
+               regulators {
+                       ldo11_reg: LDO11 {
+                               regulator-name = "vdd_ldo11";
+                               regulator-min-microvolt = <1900000>;
+                               regulator-max-microvolt = <1900000>;
+                               regulator-always-on;
+                       };
+
+                       buck1_reg: BUCK1 {
+                               regulator-name = "vdd_mif";
+                               regulator-min-microvolt = <950000>;
+                               regulator-max-microvolt = <1300000>;
+                               regulator-always-on;
+                               regulator-boot-on;
+                       };
+       };