linux-kernel - Re: [PATCH 5/9] mfd: Add UART support for the ST-Ericsson CG2900.

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Message-Id: <201012081351.43752.arnd@arndb.de>
Date:	Wed, 8 Dec 2010 13:51:43 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	"Par-Gunnar Hjalmdahl" <pghatwork@...il.com>
Cc:	Pavan Savoy <pavan_savoy@...y.com>,
	Vitaly Wool <vitalywool@...il.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	linus.walleij@...ricsson.com, linux-bluetooth@...r.kernel.org,
	linux-kernel@...r.kernel.org, Marcel Holtmann <marcel@...tmann.org>
Subject: Re: [PATCH 5/9] mfd: Add UART support for the ST-Ericsson CG2900.

On Wednesday 08 December 2010, Par-Gunnar Hjalmdahl wrote:
> > Marcel did previously suggest a bus-driver sort of a structure, where
> > the transport are sort of adapter drivers, the data interpretation
> > logic like splitting HCI-events, FM CH-8 packets all fall into the
> > algos drivers and the actual Bluetooth driver or GPS or FM-V4L2
> > drivers falling into the client/protocol drivers....
> 
> What the cg2900 driver has now turned into is almost like the
> cg2900_core acting as a bus, identifying which chip is connected and
> choosing correct chip driver from this. This cg2900_core module should
> not contain any vendor specific code. When identified, the chip driver
> then uses MFD to setup channels according to the functionality it
> supports (one MFD device per H4 channel). It's hard to explain
> everything of the new architecture here. I would like you to check the
> new patch set I'm trying hard to create at the moment. I will try to
> get it out on Friday, but it's hard to promise anything (there is a
> lot of work to do with it). There you could then see if it is
> something you could consider useful.

It sounds really good, I'm looking forward to your new patch set!
If it's generic enough to replace the ti-st code, that would be a
clear sign that you are on the right track ;-)

I'm not asking to fix their code yourself, but it might be good to
look at it and see if it would work.

	Arnd
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