PNI RM3100 magnetometer is a high resolution, large signal immunity
magnetometer, composed of 3 single sensors and a processing chip.
PNI is currently not in the vendors list, so this is also adding it.
+++ b/Documentation/devicetree/bindings/iio/magnetometer/pni,rm3100.txt
@@ -0,0 +1,57 @@
+* PNI RM3100 9-axis magnetometer sensor
+
+I2C Bus:
+
+Required properties:
+
+- compatible : should be "pni,rm3100-i2c"
+- reg : the I2C address of the magnetometer
+
+SPI Bus:
+
+Required properties:
+
+- compatible : should be "pni,rm3100-spi"
+- reg : address of sensor, usually 0 or 1.
+