regulator: add documentation for ACT8945A's regulator DT bindings

This patch adds documentation for the DT bindings of the regulator
subdevice of ACT8945A MFD.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 80 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/regulator/act8945a-regulator.txt b/Documentation/devicetree/bindings/regulator/act8945a-regulator.txt
new file mode 100644
index 000000000000..5c80a7779552
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/act8945a-regulator.txt
@@ -0,0 +1,80 @@
+Device-Tree bindings for regulators of Active-semi ACT8945A Multi-Function Device
+
+Required properties:
+ - compatible: "active-semi,act8945a", please refer to ../mfd/act8945a.txt.
+
+Optional properties:
+- active-semi,vsel-high: Indicates if the VSEL pin is set to logic-high.
+  If this property is missing, assume the VSEL pin is set to logic-low.
+
+Optional input supply properties:
+  - vp1-supply: The input supply for REG_DCDC1
+  - vp2-supply: The input supply for REG_DCDC2
+  - vp3-supply: The input supply for REG_DCDC3
+  - inl45-supply: The input supply for REG_LDO1 and REG_LDO2
+  - inl67-supply: The input supply for REG_LDO3 and REG_LDO4
+
+Any standard regulator properties can be used to configure the single regulator.
+
+The valid names for regulators are:
+        REG_DCDC1, REG_DCDC2, REG_DCDC3, REG_LDO1, REG_LDO2, REG_LDO3, REG_LDO4.
+
+Example:
+        pmic@5b {
+                compatible = "active-semi,act8945a";
+                reg = <0x5b>;
+                status = "okay";
+
+                active-semi,vsel-high;
+
+                regulators {
+                        vdd_1v35_reg: REG_DCDC1 {
+                                regulator-name = "VDD_1V35";
+                                regulator-min-microvolt = <1350000>;
+                                regulator-max-microvolt = <1350000>;
+                                regulator-always-on;
+                        };
+
+                        vdd_1v2_reg: REG_DCDC2 {
+                                regulator-name = "VDD_1V2";
+                                regulator-min-microvolt = <1100000>;
+                                regulator-max-microvolt = <1300000>;
+                                regulator-always-on;
+                        };
+
+                        vdd_3v3_reg: REG_DCDC3 {
+                                regulator-name = "VDD_3V3";
+                                regulator-min-microvolt = <3300000>;
+                                regulator-max-microvolt = <3300000>;
+                                regulator-always-on;
+                        };
+
+                        vdd_fuse_reg: REG_LDO1 {
+                                regulator-name = "VDD_FUSE";
+                                regulator-min-microvolt = <2500000>;
+                                regulator-max-microvolt = <2500000>;
+                                regulator-always-on;
+                        };
+
+                        vdd_3v3_lp_reg: REG_LDO2 {
+                                regulator-name = "VDD_3V3_LP";
+                                regulator-min-microvolt = <3300000>;
+                                regulator-max-microvolt = <3300000>;
+                                regulator-always-on;
+                        };
+
+                        vdd_led_reg: REG_LDO3 {
+                                regulator-name = "VDD_LED";
+                                regulator-min-microvolt = <3300000>;
+                                regulator-max-microvolt = <3300000>;
+                                regulator-always-on;
+                        };
+
+                        vdd_sdhc_1v8_reg: REG_LDO4 {
+                                regulator-name = "VDD_SDHC_1V8";
+                                regulator-min-microvolt = <1800000>;
+                                regulator-max-microvolt = <1800000>;
+                                regulator-always-on;
+                        };
+                };
+        };