regulator: add binding for the SY8824C voltage regulator

SY8824C is an I2C-controlled adjustable voltage regulator made by
Silergy Corp.

Add its device tree binding.

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Link: https://lore.kernel.org/r/20190827163341.61df63a7@xhacker.debian
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/devicetree/bindings/regulator/sy8824x.txt b/Documentation/devicetree/bindings/regulator/sy8824x.txt
new file mode 100644 (file)
index 0000000..ff8d1af
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/sy8824x.txt
@@ -0,0 +1,20 @@
+SY8824C Voltage regulator
+
+Required properties:
+- compatible: Must be "silergy,sy8824c"
+- reg: I2C slave address
+
+Any property defined as part of the core regulator binding, defined in
+./regulator.txt, can also be used.
+
+Example:
+
+       vcore: regulator@00 {
+               compatible = "silergy,sy8824c";
+               reg = <0x66>;
+               regulator-name = "vcore";
+               regulator-min-microvolt = <800000>;
+               regulator-max-microvolt = <1150000>;
+               regulator-boot-on;
+               regulator-always-on;
+       };