1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/media/video/pvrusb2/pvrusb2-cx2584x-v4l.c b/drivers/media/video/pvrusb2/pvrusb2-cx2584x-v4l.c
index ffdc45c324e5..97350b048b8d 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-cx2584x-v4l.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-cx2584x-v4l.c
@@ -84,7 +84,9 @@ static const struct routing_scheme_item routing_schemegv[] = {
                 .vid = CX25840_COMPOSITE2,
                 .aud = CX25840_AUDIO5,
         },
-        [PVR2_CVAL_INPUT_RADIO] = { /* Treat the same as composite */
+        [PVR2_CVAL_INPUT_RADIO] = {
+                /* line-in is used for radio and composite.  A GPIO is
+                   used to switch between the two choices. */
                 .vid = CX25840_COMPOSITE1,
                 .aud = CX25840_AUDIO_SERIAL,
         },