linux-kernel - Re: [PATCH] uio/pdrv

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Date:	Mon, 4 Apr 2011 19:31:49 +0200
From:	Wolfram Sang <w.sang@...gutronix.de>
To:	"Hans J. Koch" <hjk@...sjkoch.de>
Cc:	Grant Likely <grant.likely@...retlab.ca>,
	Michal Simek <monstr@...str.eu>,
	devicetree-discuss@...ts.ozlabs.org, john.williams@...alogix.com,
	linux-kernel@...r.kernel.org, gregkh@...e.de
Subject: Re: [PATCH] uio/pdrv_genirq: Add OF support

Hi Hans,

> > If the generic driver is not sufficent for a user and he
> > patches it, he can simply patch the version string, too?
> 
> Or better write a dedicated driver. Patching a generic thing like uio_pdrv_genirq
> can only be done in specialized drivers in a project. That's hackery that won't
> make it into mainline anyway.

I exactly meant that, maybe didn't make it clear enough. Of course, a seperate
driver would be better, but guess what will happen in most projects.

> > Or can we use the notifiers to set up an individual version? That could also be
> > the place to do special board-setup connected to the selected version.
> 
> How could that look like? If you have an idea for a generic solution, you're
> welcome.

That was more a brainstorming question; there are notifiers which help
populating function-pointers which also can't be expressed in a device-tree.
I just wanted to make sure this approach doesn't get overlooked.

So, the solution for now is to simply add a default value and we can check
later if it can be modified at runtime?

Regards,

   Wolfram

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

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