linux-kernel - converting appletouch to usb autosuspend...

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Message-Id: <1178995886.4168.10.camel@localhost>
Date:	Sat, 12 May 2007 20:51:26 +0200
From:	Soeren Sonnenburg <kernel@....de>
To:	linux-usb-devel@...ts.sourceforge.net,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: converting appletouch to usb autosuspend...

Dear all,

I've realized using the great powertop ( http://www.linuxpowertop.org/ )
that loading the appletouch driver (and touching it once) makes consumes
about 0.3 W even when not touching the pad. As rmmod'ing appletouch
fixes this I wonder why the driver does not do this alone. So my
question is what does one have to do to convert a driver (such as
appletouch) to make use of usb autosuspend except for

 .supports_autosuspend = 1

...

While we are at it usb related powerhogs on this macbook pro are
uhci_hcd (usb keyboard) and usb_hcd_poll_rh_status (rh_timer_func)
too...

Soeren.
-- 
Sometimes, there's a moment as you're waking, when you become aware of
the real world around you, but you're still dreaming.
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