[media] devices.txt: add video4linux device for Software Defined Radio

Add new video4linux device named /dev/swradio for Software Defined
Radio use. V4L device minor numbers are allocated dynamically
nowadays, but there is still configuration option for old fixed style.
Add note to mention that configuration option too.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/Documentation/devices.txt b/Documentation/devices.txt
index 10378cc48374..8f3e2cb5c4c5 100644
--- a/Documentation/devices.txt
+++ b/Documentation/devices.txt
@@ -1491,10 +1491,17 @@ Your cooperation is appreciated.
                  64 = /dev/radio0       Radio device
                     ...
                 127 = /dev/radio63      Radio device
+                128 = /dev/swradio0     Software Defined Radio device
+                    ...
+                191 = /dev/swradio63    Software Defined Radio device
                 224 = /dev/vbi0         Vertical blank interrupt
                     ...
                 255 = /dev/vbi31        Vertical blank interrupt
 
+                Minor numbers are allocated dynamically unless
+                CONFIG_VIDEO_FIXED_MINOR_RANGES (default n)
+                configuration option is set.
+
  81 block       I2O hard disk
                   0 = /dev/i2o/hdq      17th I2O hard disk, whole disk
                  16 = /dev/i2o/hdr      18th I2O hard disk, whole disk