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From: Colin Leroy <colin@colino.net>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev <linuxppc-dev@ozlabs.org>
Subject: Re: PMU questions
Date: Wed, 20 Oct 2004 09:46:51 +0200	[thread overview]
Message-ID: <20041020094651.5ceff814@pirandello> (raw)
In-Reply-To: <1098168058.15029.45.camel@gaston>

On 19 Oct 2004 at 16h10, Benjamin Herrenschmidt wrote:

Hi Ben, 

> > > Then, do a full charge, and drain it again completely. 
> > > Do that a few times. 
> > 
> > Without resetting the PMU ?
> 
> Yes

Thanks for your advice, it works a bit. I started with a
max_charge : 597

After the first charge/drain it went up to 
max_charge : 1854

Strangely enough after a second cycle it's now
max_charge : 1573

I can't find a logic in this stuff... Do you think there's a special
reason why Apple uses such a complicated method instead of 
a) charging until voltage stays equals for a few minutes
b) draining until voltage goes under 13.5 volts (or 13, or whatever)

In my uninformed opinion that would work better, wouldn't it?

-- 
Colin

  reply	other threads:[~2004-10-20  7:47 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-10-18 21:20 PMU questions Colin Leroy
2004-10-18 23:49 ` Benjamin Herrenschmidt
2004-10-19  6:34   ` Colin Leroy
2004-10-19  6:40     ` Benjamin Herrenschmidt
2004-10-20  7:46       ` Colin Leroy [this message]
2004-10-20  7:49         ` Benjamin Herrenschmidt
2004-10-20  8:57         ` John Steele Scott
2004-10-21 12:35   ` Jon Masters

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