linux-kernel - Re: UIO device tree bindings.

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Message-ID: <20130402024212.GA19431@roeck-us.net>
Date:	Mon, 1 Apr 2013 19:42:12 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Pavel Machek <pavel@...x.de>
Cc:	sr@...x.de, w.sang@...gutronix.de, magnus.damm@...il.com,
	hjk@...utronix.de, Greg KH <greg@...ah.com>,
	linux-kernel@...r.kernel.org, dzu@...x.de
Subject: Re: UIO device tree bindings.

On Mon, Apr 01, 2013 at 05:40:08PM +0200, Pavel Machek wrote:
> On Mon 2013-04-01 16:23:36, Pavel Machek wrote:
> > Hi!
> > 
> > I'd like to get uio device tree bindings to work -- with recent FPGA
> > parts it will be important. Latest version I see is 
> > 
> > https://lists.ozlabs.org/pipermail/linuxppc-dev/2009-June/073087.html
> > 
> > ... Is there anything newer?
> > 
> > I red the discussion, and main problem seems to be the "tell kernel to
> > drive this device tree device", right?
> 
Problem seems to be the notion that the proposed devicetree entry would not
describe the hardware, but its use. Not really sure I understand the problem,
as I would see the hardware description to be "A hardware device which is
compatible to and managed by the generic-uio driver". I would argue that
this _is_ a hardware description (if not, what is ?), but I am not the one
to make the call.

> So... here's the port to recent kernels. Not for mainline.
> 
> Signed-off-by: Pavel Machek <pavel@...x.de>
> 
Turns out this is exactly what I need, and your post saves me the time
I would have spent writing essentially the same code and submitting it,
only to have it rejected.

Thanks a lot for digging this up!

Guenter
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