linux-kernel - Re: [PATCH] regulator: rk808: Fix min

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Message-ID: <20140930225241.GO4273@sirena.org.uk>
Date:	Tue, 30 Sep 2014 23:52:41 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Heiko Stübner <heiko@...ech.de>
Cc:	Doug Anderson <dianders@...omium.org>,
	Chris Zhong <zyw@...k-chips.com>,
	linux-rockchip@...ts.infradead.org,
	Liam Girdwood <lgirdwood@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] regulator: rk808: Fix min_uV for DCDC1 & DCDC2

On Tue, Sep 30, 2014 at 06:57:51PM +0200, Heiko Stübner wrote:
> Am Dienstag, 30. September 2014, 09:43:47 schrieb Doug Anderson:
> > On Tue, Sep 30, 2014 at 2:44 AM, Chris Zhong <zyw@...k-chips.com> wrote:

> > > -       REGULATOR_LINEAR_RANGE(700000, 0, 63, 12500),
> > > +       REGULATOR_LINEAR_RANGE(712500, 0, 63, 12500),

> > I have no problem with this (and the current "dts" file I see don't go
> > this low anyway), but it doesn't match the datasheet I have right now
> > which says "0.700 V" is the min.

> Then it would be problem.

> The original statement above says, that a register value of "0" equals 700mV, 
> so changing this in this way would mean everything runs 12.5mV above the 
> target voltage.

> And I can confirm, that the current datasheet lists 700mV as equallying 
> register value 0.

Has anyone got a voltmeter?

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