linux-kernel - RE: [RFC 1/4] power_supply: Introduce charging object table

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Message-ID: <20ADAB092842284E95860F279283C5642EEC90C3@BGSMSX104.gar.corp.intel.com>
Date:	Mon, 9 Mar 2015 12:26:21 +0000
From:	"Tc, Jenny" <jenny.tc@...el.com>
To:	'Sebastian Reichel' <sre@...nel.org>
CC:	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Anton Vorontsov" <anton.vorontsov@...aro.org>,
	David Woodhouse <dwmw2@...radead.org>,
	"jonghwa3.lee@...sung.com" <jonghwa3.lee@...sung.com>,
	"myungjoo.ham@...il.com" <myungjoo.ham@...il.com>,
	"Pallala, Ramakrishna" <ramakrishna.pallala@...el.com>
Subject: RE: [RFC 1/4] power_supply: Introduce charging object table


Hi,

> > +#define PSY_MAX_BAT_NAME_LEN 8
> > +#define PSY_MAX_TEMP_ZONE 6
> > +
> > +struct psy_charging_obj {
> 
> This is not just about charging data, but also about the batteries
> thermal limits, technology and full capacity, so how about
> 
> struct psy_battery_information {

Ok, Agree.
> 
> > +	char name[PSY_MAX_BAT_NAME_LEN];
> 
> char *name;
> 
> No need for arbitrary length limitation.

The length limitation is introduced to form a packed structure so that
the data can be read directly from memory without parsing.

> 
> > +	int battery_type;
> > +	int temp_max;
> > +	int temp_min;
> > +	int full_condition_soc;
> 
> Please be more verbose about the information being stored here.

Ok..Agree.
> 
> > +	int full_condition_capacity;
> > +	int full_condition_voltage;
> > +	int iterm; /* charge termination current */
> > +	/* CC/CV table for different temperature range */
> > +	int temp_mon_count; /* number of entries in temp_mon_table */
> > +	struct psy_temp_mon_table temp_mon_table[PSY_MAX_TEMP_ZONE];
> 
> No need to embed this into the struct. Just point to the array and
> remove the size limitation.

This is to make sure that the array is packed so that the data can be
read directly from memory without parsing.

-Jenny
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