linux-kernel - Re: [PATCH 4/4] [RFC] UIO: generic platform driver

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Message-ID: <20080410200819.GA16292@digi.com>
Date:	Thu, 10 Apr 2008 22:08:19 +0200
From:	Uwe Kleine-König <Uwe.Kleine-Koenig@...i.com>
To:	"Hans J. Koch" <hjk@...utronix.de>
Cc:	Greg Kroah-Hartman <gregkh@...e.de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] [RFC] UIO: generic platform driver

Hello Hans,

Hans J. Koch wrote:
> On Thu, Apr 10, 2008 at 02:37:03PM +0200, Uwe Kleine-König wrote:
> > Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@...i.com>
> > ---
> >  drivers/uio/Kconfig    |    7 ++
> >  drivers/uio/Makefile   |    1 +
> >  drivers/uio/uio_pdrv.c |  165 ++++++++++++++++++++++++++++++++++++++++++++++++
> >  3 files changed, 173 insertions(+), 0 deletions(-)
> >  create mode 100644 drivers/uio/uio_pdrv.c
> 
> I'm a bit slow today, I don't really understand what this is good for.
> It's to complicated to serve as a template, and it doesn't support
> interrupts, so it's not good for any real device, too. So the only
> usecase would be an irq-less platform_device that just needs its memory
> mapped. Is this what you intended? What do _you_ use it for?
In my use case I don't use an irq, but you're free to provide a handler
when you create the platform device.  Attached is the file that provides
an uio platform device.  Current vanilla's support for ns9xxx isn't
(yet) complete enough to compile that, but you should be able to see how
it works.

Best regards
Uwe

-- 
Uwe Kleine-König, Software Engineer
Digi International GmbH Branch Breisach, Küferstrasse 8, 79206 Breisach, Germany
Tax: 315/5781/0242 / VAT: DE153662976 / Reg. Amtsgericht Dortmund HRB 13962

View attachment "plat-uio.c" of type "text/x-csrc" (2388 bytes)