Add device tree binding information for mt6315 regulator driver.
Example bindings for mt6315 are added.

Signed-off-by: Hsin-Hsiung Wang <hsin-hsiung.w...@mediatek.com>
---
 .../bindings/regulator/mt6315-regulator.txt        | 45 ++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 
Documentation/devicetree/bindings/regulator/mt6315-regulator.txt

diff --git a/Documentation/devicetree/bindings/regulator/mt6315-regulator.txt 
b/Documentation/devicetree/bindings/regulator/mt6315-regulator.txt
new file mode 100644
index 0000000..1c14537
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/mt6315-regulator.txt
@@ -0,0 +1,45 @@
+Mediatek MT6315 Regulator
+
+Required properties:
+- compatible: Must be one of the following.
+       "mediatek,mt6315_3-regulator"
+       "mediatek,mt6315_6-regulator"
+       "mediatek,mt6315_7-regulator"
+- reg: SPMI slave id.
+- regulators: List of regulators provided by this controller.
+  The definition for each of these nodes is defined using the standard binding
+  for regulators at Documentation/devicetree/bindings/regulator/regulator.txt.
+
+The valid names for regulators are:
+BUCK:
+  vbuck1, vbuck3, vbuck4
+
+Example:
+       mt6315_3: mt6315@3 {
+               compatible = "mediatek,mt6315_3-regulator";
+               reg = <0x3 0 0xb 1>;
+
+               mt6315_3_vbuck1: vbuck1 {
+                       regulator-compatible = "vbuck1";
+                       regulator-min-microvolt = <300000>;
+                       regulator-max-microvolt = <1193750>;
+                       regulator-enable-ramp-delay = <256>;
+                       regulator-allowed-modes = <0 1 2 4>;
+               };
+
+               mt6315_3_vbuck3: vbuck3 {
+                       regulator-compatible = "vbuck3";
+                       regulator-min-microvolt = <300000>;
+                       regulator-max-microvolt = <1193750>;
+                       regulator-enable-ramp-delay = <256>;
+                       regulator-allowed-modes = <0 1 2 4>;
+               };
+
+               mt6315_3_vbuck3: vbuck3 {
+                       regulator-compatible = "vbuck3";
+                       regulator-min-microvolt = <300000>;
+                       regulator-max-microvolt = <1193750>;
+                       regulator-enable-ramp-delay = <256>;
+                       regulator-allowed-modes = <0 1 2 4>;
+               };
+       };
-- 
2.6.4

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