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SubjectRe: Re: [PATCH 5/5] max17042: Change capacity property to use reported SOC register
Anton Vorontsov<cbouatmailru@gmail.com>, 2012-03-14 03:34 (GMT+09:00)
> On Tue, Jan 24, 2012 at 09:26:08AM -0800, dirk.brandewie@gmail.com wrote:
> > From: Dirk Brandewie
> >
> > The SOC register (0dh) reports the state of charge before empty
> > compensation adjustments are applied. The max value reported by this
> > register will decrease as the battery ages.
> >
> > Use the RepSOC register (06h) to report the capacity of the
> > battery. RepSOC contains a filtered version of the battery capacity
> > after empty compensation adjustments have been applied.
> >
> > Reported-by: Gary Keyes
> >
> > Signed-off-by: Dirk Brandewie
> > ---
> > drivers/power/max17042_battery.c | 2 +-
> > 1 files changed, 1 insertions(+), 1 deletions(-)
> >
> > diff --git a/drivers/power/max17042_battery.c b/drivers/power/max17042_battery.c
> > index 6e96b58..2194278 100644
> > --- a/drivers/power/max17042_battery.c
> > +++ b/drivers/power/max17042_battery.c
> > @@ -160,7 +160,7 @@ static int max17042_get_property(struct power_supply *psy,
> > break;
> > case POWER_SUPPLY_PROP_CAPACITY:
> > val->intval = max17042_read_reg(chip->client,
> > - MAX17042_SOC) / 256;
> > + MAX17042_RepSOC) / 256;
>
> Applied. But I don't get it: PROP_CAPACITY should report
> percents! And it looks that it reports something very
> different.

The 8 most significant bits show values in percents. The least 8 bits show 1/256 percents.

>
> Also, if you look down the file, you'll see this:
>
> case POWER_SUPPLY_PROP_CHARGE_FULL:

I've just sent a patch to correct this problem: "max17042: fix CHARGE_FULL representation."



Cheers!
MyungJoo

--
MyungJoo Ham (함명주), PHD
System S/W Lab, S/W Platform Team, Software Center
Samsung Electronics
Cell: +82-10-6714-2858
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