linux-kernel - Re: [RESEND PATCH v10 4/4] power: wm831x_power: Support USB charger current limit management

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Message-ID: <20160503105718.GL6292@sirena.org.uk>
Date:	Tue, 3 May 2016 11:57:18 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Manish Badarkhe <badarkhe.manish@...il.com>
Cc:	Baolin Wang <baolin.wang@...aro.org>, balbi@...nel.org,
	gregkh@...uxfoundation.org, sre@...nel.org,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	David Woodhouse <dwmw2@...radead.org>, robh@...nel.org,
	m.szyprowski@...sung.com, ruslan.bilovol@...il.com,
	peter.chen@...escale.com, stern@...land.harvard.edu,
	r.baldyga@...sung.com, yoshihiro.shimoda.uh@...esas.com,
	Lee Jones <lee.jones@...aro.org>,
	ckeepax@...nsource.wolfsonmicro.com,
	patches@...nsource.wolfsonmicro.com, linux-pm@...r.kernel.org,
	linux-usb@...r.kernel.org,
	device-mainlining@...ts.linuxfoundation.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RESEND PATCH v10 4/4] power: wm831x_power: Support USB charger
 current limit management

On Tue, May 03, 2016 at 09:30:48AM +0530, Manish Badarkhe wrote:
> On Tue, May 3, 2016 at 9:00 AM, Baolin Wang <baolin.wang@...aro.org> wrote:

> > +static const unsigned int wm831x_usb_limits[] = {
> > +       0,
> > +       2,
> > +       100,
> > +       500,
> > +       900,
> > +       1500,
> > +       1800,
> > +       550,
> > +};

> Just for curiosity, How these current limits are getting decided?
> Can we have some proper defines over here so that it can be grasped easily?

They're in the silicon, it's just a table of values that were put into
the silicon at design time.  The defines would just be TABLE_ENTRY_1 or
whatever.

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