staging: comedi: range: introduce range_unipolar2_5

Introduce a simple unipolar 0 to 2.5 range, range_unipolar2_5, for
use by the comedi drivers.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/comedidev.h

@@ -294,6 +294,7 @@ extern const struct comedi_lrange range_bipolar5;
 extern const struct comedi_lrange range_bipolar2_5;
 extern const struct comedi_lrange range_unipolar10;
 extern const struct comedi_lrange range_unipolar5;
+extern const struct comedi_lrange range_unipolar2_5;
 extern const struct comedi_lrange range_unknown;
 
 #define range_digital		range_unipolar5

drivers/staging/comedi/range.c

@@ -35,6 +35,8 @@ const struct comedi_lrange range_unipolar10 = { 1, {UNI_RANGE(10)} };
 EXPORT_SYMBOL(range_unipolar10);
 const struct comedi_lrange range_unipolar5 = { 1, {UNI_RANGE(5)} };
 EXPORT_SYMBOL(range_unipolar5);
+const struct comedi_lrange range_unipolar2_5 = { 1, {UNI_RANGE(2.5)} };
+EXPORT_SYMBOL(range_unipolar2_5);
 const struct comedi_lrange range_unknown = { 1, {{0, 1000000, UNIT_none} } };
 EXPORT_SYMBOL(range_unknown);