linux-kernel - Re: [PATCH 06/15] twl4030_charger: split uA calculation into a function.

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Message-ID: <20150304202033.653292df@notabene.brown>
Date:	Wed, 4 Mar 2015 20:20:33 +1100
From:	NeilBrown <neilb@...e.de>
To:	Pavel Machek <pavel@....cz>
Cc:	Samuel Ortiz <sameo@...ux.intel.com>,
	Tony Lindgren <tony@...mide.com>,
	Lee Jones <lee.jones@...aro.org>,
	Sebastian Reichel <sre@...nel.org>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	GTA04 owners <gta04-owner@...delico.com>,
	linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org
Subject: Re: [PATCH 06/15] twl4030_charger: split uA calculation into a
 function.

On Mon, 2 Mar 2015 22:05:18 +0100 Pavel Machek <pavel@....cz> wrote:

> On Tue 2015-02-24 15:33:51, NeilBrown wrote:
> > We will need this calculation in other places, so
> > create functions to map between register value and uA value.
> > 
> > Signed-off-by: NeilBrown <neilb@...e.de>
> 
> Acked-by: Pavel Machek <pavel@....cz>

Thanks.


> 
> > +static int regval2ua(int regval, bool cgain)
> > +{
> > +	if (cgain)
> > +		return (regval * 16618 - 8500 * 1000) / 5;
> > +	else
> > +		return (regval * 16618 - 8500 * 1000) / 10;
> > +}
> 
>    int res = (regval * 16618 - 8500 * 1000);
>    if (cgain)
>       return res / 5;
>    return res / 10;
> 
> ?
> 									Pavel

Maybe ... not sure it is really more readable.  I think I'll leave it as is.

Thanks,
NeilBrown

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