From 5459bc1281e628e6f57ee16c69eaf8a9622912e8 Mon Sep 17 00:00:00 2001
From: Ian Abbott <abbotti@mev.co.uk>
Date: Mon, 21 Sep 2015 18:52:53 +0100
Subject: [PATCH] staging: comedi: comedidev.h: document struct comedi_lrange
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/comedi/comedidev.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h
index cfb7d520d82f8..195fa5791c13b 100644
--- a/drivers/staging/comedi/comedidev.h
+++ b/drivers/staging/comedi/comedidev.h
@@ -606,6 +606,17 @@ extern const struct comedi_lrange range_unknown;
#define GCC_ZERO_LENGTH_ARRAY 0
#endif
+/**
+ * struct comedi_lrange - Describes a COMEDI range table
+ * @length: Number of entries in the range table.
+ * @range: Array of &struct comedi_krange, one for each range.
+ *
+ * Each element of @range[] describes the minimum and maximum physical range
+ * range and the type of units. Typically, the type of unit is %UNIT_volt
+ * (i.e. volts) and the minimum and maximum are in millionths of a volt.
+ * There may also be a flag that indicates the minimum and maximum are merely
+ * scale factors for an unknown, external reference.
+ */
struct comedi_lrange {
int length;
struct comedi_krange range[GCC_ZERO_LENGTH_ARRAY];
--
2.30.2