Re: N900 DT

From: Pali RohÃr
Date: Sat Oct 26 2013 - 09:27:54 EST

On Saturday 26 October 2013 02:25:02 Sebastian Reichel wrote:
> Hi Pali,
> On Fri, Oct 25, 2013 at 08:39:40PM +0200, Pali RohÃr wrote:
> > Now I found this patch and it looks like it will be in
> > mainline kernel. And after that it could be simple to
> > listen for needed events from isp driver in my bq driver
> > (without touching isp).
> >
> >
> >
> > Can you look at isp1704 driver for DT support? I think that
> > only one gpio needs to be passed to driver from board data.
> I had a quick overview over Jenny's patchset [0] (the patch
> you referenced is part of a bigger patchset). I don't think
> the scenario found in the Nokia N900 is covered by it, but
> probably now is the time to change it :)
> So for everybody new to this thread:
> Multiple chips are involved in the charging of the Nokia N900
> battery:
> bq27200: This chip is used for reading battery status. AFAIK
> it's not directly involved in charging the battery.
> bq24150a: This chip takes care of actually charging the
> battery. It has no clue about USB related stuff. The maximum
> current it draws can be configured, though. isp1704: USB
> charger detector. This chip is used to detect how much
> current may be used by the bq24150a chip. rx51-temp: Analog
> temperature sensor for the battery, which is connected via an
> analog-digital-converter.
> The question is how to connected these driver with each other
> if device tree is used to boot the system. Any suggestions?
> [0]
> -- Sebastian

What I need is receive property change event (from isp1704) in
bq24150a. And with this patch
bq24150a driver can receive them and use only these which comes
from driver specified in DT (on n900 from isp1704).

Pali RohÃr

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