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Date:	Mon, 7 Feb 2011 02:00:50 +0200
From:	Felipe Contreras <>
To:	Lars-Peter Clausen <>
Cc:	Anton Vorontsov <>,
	Rodolfo Giometti <>,
	Grazvydas Ignotas <>,,
	Pali Rohár <>
Subject: Re: [PATCH 00/14] POWER: BQ27x00: New Properties, fixes, bq27000 support

On Mon, Feb 7, 2011 at 1:09 AM, Lars-Peter Clausen <> wrote:
> On 02/06/2011 11:47 PM, Felipe Contreras wrote:
>> Hi,
>> On Sun, Feb 6, 2011 at 2:47 AM, Lars-Peter Clausen <> wrote:
>>> This patch series contains a few updates for the bq27x00 driver:
>>> * Support for additional power supply properties
>>> * Support for the bq27000 battery which is identical to the bq27200 but is
>>>  connected through the HDQ bus.
>>> * Adds a register cache to the driver and introduces polling the batteries state
>>> * Minor improvements and cleanups
>>> The last patch in this series is not specific to the bq27x00 driver but is
>>> required for uevents to be generated properly for this driver.
>>> The patch makes properties which return -ENODATA to be ignored when generating
>>> uevents. Previously in such a case uevent generation would have been aborted
>>> with an error. But since the bq27x00 return -ENODATA for the TIME_TO_FULL
>>> property when the battery is not charging and for the TIME_TO_EMPTY property
>>> when the battery is not discharging and at least one of them is always true
>>> uevent generation would always fail.
>>> This series has so far been tested with the bq27000 and the bq27200 battery, but
>>> not with the bq27500 battery, so it would be nice if somebody with a board
>>> containing such a battery could test the patches to make sure that there are no
>>> regressions.
>> This might be a bit off-topic, but I have tried to get the battery on
>> the Nokia N900 working, and so far I'm only able to query the
>> remaining capacity, but not really to enabling charging. This is very
>> annoying, as I can only hack a certain amount of time, and then I have
>> to reflash, reboot, and wait for the batter to charge with the
>> official system (if there's enough power to flash).
>> Do you have any hints how to do that?
> Sorry, I've never worked with the N900, so I have no idea. But Pali has tested this
> patch series on his N900, so he might have an idea.

Well, it has a bq27200 AFAIK.

Felipe Contreras
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