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-rw-r--r--Documentation/usb/proc_usb_info.txt21
1 files changed, 11 insertions, 10 deletions
diff --git a/Documentation/usb/proc_usb_info.txt b/Documentation/usb/proc_usb_info.txt
index 22c5331260c..077e9032d0c 100644
--- a/Documentation/usb/proc_usb_info.txt
+++ b/Documentation/usb/proc_usb_info.txt
@@ -213,15 +213,16 @@ C:* #Ifs=dd Cfg#=dd Atr=xx MPwr=dddmA
Interface descriptor info (can be multiple per Config):
-I: If#=dd Alt=dd #EPs=dd Cls=xx(sssss) Sub=xx Prot=xx Driver=ssss
-| | | | | | | |__Driver name
-| | | | | | | or "(none)"
-| | | | | | |__InterfaceProtocol
-| | | | | |__InterfaceSubClass
-| | | | |__InterfaceClass
-| | | |__NumberOfEndpoints
-| | |__AlternateSettingNumber
-| |__InterfaceNumber
+I:* If#=dd Alt=dd #EPs=dd Cls=xx(sssss) Sub=xx Prot=xx Driver=ssss
+| | | | | | | | |__Driver name
+| | | | | | | | or "(none)"
+| | | | | | | |__InterfaceProtocol
+| | | | | | |__InterfaceSubClass
+| | | | | |__InterfaceClass
+| | | | |__NumberOfEndpoints
+| | | |__AlternateSettingNumber
+| | |__InterfaceNumber
+| |__ "*" indicates the active altsetting (others are " ")
|__Interface info tag
A given interface may have one or more "alternate" settings.
@@ -277,7 +278,7 @@ of the USB devices on a system's root hub. (See more below
on how to do this.)
The Interface lines can be used to determine what driver is
-being used for each device.
+being used for each device, and which altsetting it activated.
The Configuration lines could be used to list maximum power
(in milliamps) that a system's USB devices are using.