linux-kernel - Re: Re[2]: Where did find

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Date:	Tue, 21 Nov 2006 14:02:26 -0500
From:	"Dmitry Torokhov" <dmitry.torokhov@...il.com>
To:	"Paul Sokolovsky" <pmiscml@...il.com>
Cc:	"Greg KH" <gregkh@...e.de>,
	"Arjan van de Ven" <arjan@...radead.org>,
	"Jiri Slaby" <jirislaby@...il.com>, linux-kernel@...r.kernel.org,
	"Adrian Bunk" <bunk@...sta.de>, kernel-discuss@...dhelds.org
Subject: Re: Re[2]: Where did find_bus() go in 2.6.18?

On 11/20/06, Paul Sokolovsky <pmiscml@...il.com> wrote:
>
> [Uninteresting specific case]
>
>  Ok, so the situation is following: we have a kind of multi-layered
> driver here. Lowest level is a w1_slave bus driver, talking to a
> specific chip and providing low-level API for accessing data in terms
> of this chip (or chip class) notions. Above it, we have higher-level
> driver which interprets data from the low-level one, converting it to
> a standard device-independent form, plus possibly does some other
> minor things, like providing feedback indication on these data.
> (Forgot to say that this is battery driver.)
>
>  So, just in case if some reader of this has quick suggestion of
> merging these drivers into one, thanks, but they do different things,
> and we want to keep them nicely decoupled. But now issue of how these
> drivers talk between themselves raises, and that's exactly the grief
> point.
>

My suggestion would be do define a class for your device independent
data and have low-level driver create a class device (or just a device
if Greg has his way with driver core) and change your high-level
driver to become a class interface.

And then you won't have to rescan w1 bus every 5 seconds for that battery...

-- 
Dmitry
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