linux-kernel - Re: [PATCH 08/15] twl4030_charger: distinguish between USB current and 'AC' current

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Date:	Wed, 4 Mar 2015 17:53:02 +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 08/15] twl4030_charger: distinguish between USB current
 and 'AC' current

On Mon, 2 Mar 2015 22:05:10 +0100 Pavel Machek <pavel@....cz> wrote:

> Hi!
> 
> > The twl4030 charger has two current sources, 'USB' and 'AC' (which is
> > really DC of course...).
> > 
> > If 'AC' is providing current, we should set the current limit
> > differently to when it isn't (and so USB is used).
> > So split 'cur' into 'usb_cur' and 'ac_cur' and use accordingly.
> > 
> > Now we must review the current setting on any interrupt or USB
> > event which might indicate that the charger-source has changed.
> > 
> > Signed-off-by: NeilBrown <neilb@...e.de>
> 
> > @@ -103,7 +104,9 @@ struct twl4030_bci {
> >  	/* ichg values in uA. If any are 'large', we set CGAIN to
> 
> ichg/_cur values
> 
> >  	 * '1' which doubles the range for half the precision.
> >  	 */
> > -	int			ichg_eoc, ichg_lo, ichg_hi, cur;
> > +	int			ichg_eoc, ichg_lo, ichg_hi;
> > +	int			usb_cur, ac_cur;
> 
> > +	/* If VAC exceeds 4.5V (MADC 11) and ac is enabled, set current
> > +	 * for 'ac'
> 
> 	/*
> 	 * If AC voltage exceeds 4.5V (MADC 11) and AC is enabled, set current
> 	 * for 'ac'.
> 
> 
> Acked-by: Pavel Machek <pavel@....cz>
> 

Thanks - I made those changes, or something much like them.

NeilBrown

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