linux-kernel - Re: [jenny.tc@...el.com: [RFC] power_supply: Introduce generic psy charging driver]

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Message-ID: <20140507132347.GA21687@amd.pavel.ucw.cz>
Date:	Wed, 7 May 2014 15:23:47 +0200
From:	Pavel Machek <pavel@....cz>
To:	Jenny Tc <jenny.tc@...el.com>
Cc:	linux-kernel@...r.kernel.org, dbaryshkov@...il.com,
	cbouatmailru@...il.com, anton.vorontsov@...aro.org,
	tony@...mide.com, linux-omap@...r.kernel.org
Subject: Re: [jenny.tc@...el.com: [RFC] power_supply: Introduce generic psy
 charging driver]

Hi!

> > > +#define PSY_MAX_CV(psy) \
> > > +		psy_get_ps_int_property(psy,\
> > > +			POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX)
> > > +#define PSY_VOLTAGE_NOW(psy) \
> > > +		psy_get_ps_int_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW)
> > > +#define PSY_VOLTAGE_OCV(psy) \
> > > +		psy_get_ps_int_property(psy, POWER_SUPPLY_PROP_VOLTAGE_OCV)
> > > +#define PSY_CURRENT_NOW(psy) \
> > > +		psy_get_ps_int_property(psy, POWER_SUPPLY_PROP_CURRENT_NOW)
> > > +#define PSY_STATUS(psy) \
> > > +		psy_get_ps_int_property(psy, POWER_SUPPLY_PROP_STATUS)
> > > +#define PSY_TEMPERATURE(psy) \
> > > +		psy_get_ps_int_property(psy, POWER_SUPPLY_PROP_TEMP)
> > > +#define PSY_BATTERY_TYPE(psy) \
> > > +		psy_get_ps_int_property(psy, POWER_SUPPLY_PROP_TECHNOLOGY)
> > > +#define PSY_ONLINE(psy) \
> > > +		psy_get_ps_int_property(psy, POWER_SUPPLY_PROP_ONLINE)
> > 
> > This looks like bad idea. Just opencode it.
> 
> This was to make it more readable, and avoids open codes in multiple places.
> Initially Anton had positive thoughts about this. Isn't it more readable with
> the macros?

Well... I'd expect PSY_ONLINE() macro to do something like (psy &
0x01), not call function. Yes, it is shorter, but IMO it is not
clearer.

But if Anton likes it...

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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