dt-bindings: iio: document envelope-detector bindings

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index e63719d..76c3124 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6127,6 +6127,12 @@
 F:	Documentation/devicetree/bindings/iio/dac/dpot-dac.txt
 F:	drivers/iio/dac/dpot-dac.c
 
+IIO ENVELOPE DETECTOR
+M:	Peter Rosin <peda@axentia.se>
+L:	linux-iio@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/iio/adc/envelope-detector.txt
+
 IIO SUBSYSTEM AND DRIVERS
 M:	Jonathan Cameron <jic23@kernel.org>
 R:	Hartmut Knaack <knaack.h@gmx.de>