From: bgat@billgatliff.com (Bill Gatliff)
To: linux-arm-kernel@lists.infradead.org
Subject: [POWER] battery calibration parameters from sysfs
Date: Mon, 14 Dec 2009 21:02:42 -0600 [thread overview]
Message-ID: <4B26FC52.6060307@billgatliff.com> (raw)
In-Reply-To: <ed62800912141543v2ab7ef63v4b6b2c33018b3296@mail.gmail.com>
Aras Vaichas wrote:
> Unfortunately the simple coulomb counting chips have the disadvantage
> that the CPU has to be running to accumulate the pulses. Of course,
> the pulses could wake the CPU from a suspend mode, but I'd rather not
> do that just to add "one" to a counter ...
>
Could you have the coulomb-counting chip connected to a tiny
microcontroller, or even a dedicated hardware counter? Then the main
CPU wouldn't need to wake as often, it could just ask the
microcontroller over I2C, or read/reset the hardware counter.
b.g.
--
Bill Gatliff
bgat at billgatliff.com
next prev parent reply other threads:[~2009-12-15 3:02 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <A6D19A13FE030A409EC4362C172E091F0E0495F6@eseldmw101.eemea.ericsson.se>
[not found] ` <20091204104930.GA28625@sirena.org.uk>
[not found] ` <A6D19A13FE030A409EC4362C172E091F0E071EB9@eseldmw101.eemea.ericsson.se>
[not found] ` <20091207114825.GA26965@rakim.wolfsonmicro.main>
[not found] ` <A6D19A13FE030A409EC4362C172E091F0E0A1FA1@eseldmw101.eemea.ericsson.se>
[not found] ` <20091207165628.GA24981@rakim.wolfsonmicro.main>
2009-12-13 13:24 ` [POWER] battery calibration parameters from sysfs Pavel Machek
2009-12-14 12:12 ` Mark Brown
2009-12-14 21:22 ` Pavel Machek
2009-12-14 23:43 ` Aras Vaichas
2009-12-15 3:02 ` Bill Gatliff [this message]
2009-12-15 22:58 ` Aras Vaichas
2009-12-15 23:32 ` Stanislav Brabec
2009-12-16 9:40 ` Andy Green
2009-12-18 8:48 ` Pavel Machek
2009-12-16 22:53 ` Pavel Machek
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