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USB: add power/level sysfs attribute

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This patch (as874) adds another piece to the user-visible part of the
USB autosuspend interface.  The new power/level sysfs attribute allows
users to force the device on (with autosuspend off), force the device
to sleep (with autoresume off), or return to normal automatic operation.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2007-03-20 14:59:39 -04:00 • committed by Greg Kroah-Hartman
parent 13f6be01db
commit 2add5229d7
5 changed files with 118 additions and 8 deletions
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include/linux/usb.h
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@ -398,6 +398,8 @@ struct usb_device {
unsigned auto_pm:1; /* autosuspend/resume in progress */
unsigned do_remote_wakeup:1; /* remote wakeup should be enabled */
unsigned autosuspend_disabled:1; /* autosuspend and autoresume */
unsigned autoresume_disabled:1; /* disabled by the user */
#endif
};
#define to_usb_device(d) container_of(d, struct usb_device, dev)