linux-kernel - Re: [PATCH 1/2] regulator: s5m8767: Modify parse_dt function to parse data related to ramp

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Date:	Thu, 10 Oct 2013 18:36:27 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Mark Rutland <mark.rutland@....com>
Cc:	Chanwoo Choi <cw00.choi@...sung.com>,
	"lgirdwood@...il.com" <lgirdwood@...il.com>,
	"sbkim73@...sung.com" <sbkim73@...sung.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Kyungmin Park <kyungmin.park@...sung.com>
Subject: Re: [PATCH 1/2] regulator: s5m8767: Modify parse_dt function to
 parse data related to ramp

On Thu, Oct 10, 2013 at 05:51:00PM +0100, Mark Rutland wrote:
> On Thu, Oct 10, 2013 at 12:10:53PM +0100, Chanwoo Choi wrote:

> > Turn on ramp control of buck2/3/4.

> Ok, but why does this need to be in the dt?

Ramp control is a hardware system integration decision which people
working with regulators should be familiar with - you're trading off
speed of power on or voltage change for maximum current draw from the
regulator supply.  The term should be sufficiently clear to an engineer
who can make an informed decision about using it.

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