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-rw-r--r--Documentation/usb/sn9c102.txt9
1 files changed, 8 insertions, 1 deletions
diff --git a/Documentation/usb/sn9c102.txt b/Documentation/usb/sn9c102.txt
index 541b17fd27f6..c6b76414172c 100644
--- a/Documentation/usb/sn9c102.txt
+++ b/Documentation/usb/sn9c102.txt
@@ -111,6 +111,12 @@ corresponding modules must be compiled:
#
CONFIG_VIDEO_DEV=m
+To enable advanced debugging functionality on the device through /sysfs:
+
+ # Multimedia devices
+ #
+ CONFIG_VIDEO_ADV_DEBUG=y
+
# USB support
#
CONFIG_USB=m
@@ -208,7 +214,8 @@ Default: 2
8. Optional device control through "sysfs" [1]
==========================================
-It is possible to read and write both the SN9C10x and the image sensor
+If the kernel has been compiled with the CONFIG_VIDEO_ADV_DEBUG option enabled,
+it is possible to read and write both the SN9C10x and the image sensor
registers by using the "sysfs" filesystem interface.
Every time a supported device is recognized, a write-only file named "green" is