linux-kernel - Re: [PATCH 1/2] power_supply: Add charge control struct in power supply class

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Message-ID: <20130107053519.GA24341@lizard.gateway.2wire.net>
Date:	Sun, 6 Jan 2013 21:35:19 -0800
From:	Anton Vorontsov <anton@...msg.org>
To:	"Tc, Jenny" <jenny.tc@...el.com>
Cc:	"Pallala, Ramakrishna" <ramakrishna.pallala@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Myungjoo Ham <myungjoo.ham@...sung.com>
Subject: Re: [PATCH 1/2] power_supply: Add charge control struct in power
 supply class

On Mon, Jan 07, 2013 at 05:23:36AM +0000, Tc, Jenny wrote:
> > 
> > > > +struct power_supply_charger_control {
> > > > +	const char *name;
> > > > +	/* get charging status */
> > > > +	int (*is_charging_enabled)(void);
> > > > +	int (*is_charger_enabled)(void);
> > > > +
> > > > +	/* set charging parameters */
> > > > +	int (*set_in_current_limit)(int uA);
> > > > +	int (*set_charge_current)(int uA);
> > > > +	int (*set_charge_voltage)(int uV);
> > > > +
> > > > +	/* control battery charging */
> > > > +	int (*enable_charging)(void);
> > > > +	int (*disable_charging)(void);
> > > > +
> > > > +	/* control VSYS or system supply */
> > > > +	int (*turnon_charger)(void);
> > > > +	int (*turnoff_charger)(void);
> > > > +};
> > > > +
> > >
> > > I'm all for this patch, but why do you need to place it into
> > > power_supply.h and power_supply_core.c? :) I see nothing generic here,
> > > it's pure charger-manager stuff. So, place everything into charger-
> > manager.{c,h}.
> > 
> > Hi Anton,
> > 
> > The main reason for keeping this stuff in power_supply.h and
> > power_supply_core.c is to make these interfaces uniform Across multiple
> > charger frameworks and to avoid each charger framework define it's own
> > interfaces. If there is need for new callback They can add to the existing struct
> > defined above and it will available to all the frameworks. Also the work
> > required to support a new Framework will be reduced if the driver already
> > support any one of the existing frameworks.
> > 
> 
> Rama,
> 
> The similar functionalities are exposed by patch https://lkml.org/lkml/2012/10/18/219.
> As per Anton's review comments on this patch, I'll be moving the macros to power_supply.h.
> Wouldn't that be enough ?

Btw, how do these two sets relate to each other? Both seem to control
chargers in some way... But yours approach uses properties, which I like
more.

I guess you should coordinate on this?

Thanks,
Anton
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