The accelerometer's power supplies could be controllable on some
platforms, add property "vdd/vddio" power supply to let device tree
to pass phandles to the regulators to driver.

Signed-off-by: Anson Huang <anson.hu...@nxp.com>
---
 Documentation/devicetree/bindings/iio/accel/mma8452.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/accel/mma8452.txt 
b/Documentation/devicetree/bindings/iio/accel/mma8452.txt
index 2100e9a..e132394 100644
--- a/Documentation/devicetree/bindings/iio/accel/mma8452.txt
+++ b/Documentation/devicetree/bindings/iio/accel/mma8452.txt
@@ -20,6 +20,10 @@ Optional properties:
   - interrupt-names: should contain "INT1" and/or "INT2", the accelerometer's
                     interrupt line in use.
 
+  - vdd-supply: phandle to the regulator that provides vdd power to the 
accelerometer.
+
+  - vddio-supply: phandle to the regulator that provides vddio power to the 
accelerometer.
+
 Example:
 
        mma8453fc@1d {
-- 
2.7.4

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