linux-kernel - Re: [PATCH 4/7] gpiolib: implement dev_gpiochip

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Message-Id: <1224737145.7654.387.camel@pasglop>
Date:	Thu, 23 Oct 2008 15:45:45 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	David Brownell <david-b@...bell.net>
Cc:	avorontsov@...mvista.com, linux-kernel@...r.kernel.org,
	linuxppc-dev@...abs.org, i2c@...sensors.org,
	Jean Delvare <khali@...ux-fr.org>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH 4/7] gpiolib: implement dev_gpiochip_{add,remove} calls

On Wed, 2008-10-22 at 14:04 -0700, David Brownell wrote:
> > So if we register the board infos after 
> > the controller registered, then nobody will probe the board infos.
> 
> See above.  If you're doing it right, there's no problem.
> That is, scan the OF tables early.  Just like PNP tables
> get scanned early, for example.

It's still pretty yucky in that case to scan the device-tree to convert
it into some kind of fugly board info ... I'd rather have the end
drivers that actually use those GPIOs scan the device-tree directly.

But then, I'm not a believer in generic drivers for things like GPIOs,
i2c devices, etc.. :-)

Ben.


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