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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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2
drivers/usb/core/quirks.c
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@@ -42,7 +42,7 @@ static void usb_autosuspend_quirk(struct usb_device *udev)
{
#ifdef CONFIG_USB_SUSPEND
/* disable autosuspend, but allow the user to re-enable it via sysfs */
udev->autosuspend_delay = 0;
udev->autosuspend_disabled = 1;
#endif
}