linux-kernel - Re: power supply gating with ltc2978

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Message-ID: <20140816132050.GH28623@sirena.org.uk>
Date:	Sat, 16 Aug 2014 14:20:50 +0100
From:	Mark Brown <broonie@...nel.org>
To:	atull <atull@...nsource.altera.com>
Cc:	Guenter Roeck <linux@...ck-us.net>,
	Jean Delvare <jdelvare@...e.de>, lm-sensors@...sensors.org,
	linux-kernel@...r.kernel.org, Liam Girdwood <lgirdwood@...il.com>
Subject: Re: power supply gating with ltc2978

On Fri, Aug 15, 2014 at 04:34:49PM -0500, atull wrote:

> I am interested in adding functionality to be able to gate power supplies 
> going through a ltc2978.  I see that there is a hwmon driver already 
> existing (hwmon/pmbus/ltc2978.c).  I see some of the other hwmon drivers 
> have MFD's.  It looks like this ltc driver would need a MFD and a 
> regulator driver added.  However I don't see other pmbus hwmon drivers
> using MFD.

> So I am asking for recommendations and reservations on how to proceed here 
> before I get too far with this.

Without knowing anything at all about pmbus or this particular hardware
it's hard to comment but what you're saying here sounds sensible (though
I do see that apparently splitting the drivers may not actually be
sensible from Guenter's followup).

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