linux-kernel - Re: [patch 2.6.29-rc3-git 2/2] USB: disable twl4030 USB regulators when cable unplugged

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Message-Id: <200902261440.04129.david-b@pacbell.net>
Date:	Thu, 26 Feb 2009 14:40:03 -0800
From:	David Brownell <david-b@...bell.net>
To:	Liam Girdwood <lrg@...mlogic.co.uk>
Cc:	Mark Brown <broonie@...ena.org.uk>,
	lkml <linux-kernel@...r.kernel.org>, linux-usb@...r.kernel.org,
	OMAP <linux-omap@...r.kernel.org>,
	Kalle Jokiniemi <kalle.jokiniemi@...ia.com>
Subject: Re: [patch 2.6.29-rc3-git 2/2] USB: disable twl4030 USB regulators when cable unplugged

On Thursday 26 February 2009, Liam Girdwood wrote:
> On Sun, 2009-02-08 at 10:52 -0800, David Brownell wrote:
> > From: Kalle Jokiniemi <kalle.jokiniemi@...ia.com>
> > 
> > This patch disables LDO regulators VUSB1V5, VUSB1V8, and VUSB3V1
> > when the USB cable is unplugged, to eliminate that source of power
> > waste.  (Enabled LDOs consume power at all times.)
> > 
> > Signed-off-by: Kalle Jokiniemi <kalle.jokiniemi@...ia.com>
> > Signed-off-by: David Brownell <dbrownell@...rs.sourceforge.net>
> > ---
> > Depends on the twl4030 regulator driver, so I'm suggesting this
> > be merged (with that driver) through the regulator patch queue
> > to simplify things.
> > 
> >  drivers/usb/otg/twl4030-usb.c |   30 ++++++++++++++++++++++++------
> >  1 file changed, 24 insertions(+), 6 deletions(-)
> 
> Applied.

Better suggestion:  grab Kalle's updated patch from Greg's USB
queue:

  http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/gregkh-04-usb/

patch name usb-twl-disable-vusb-regulators-when-cable-unplugged.patch

- Dave
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