Messages in this thread | | | Subject | Re: [PATCH 4/4] [RFC] UIO: generic platform driver | From | Ben Nizette <> | Date | Fri, 11 Apr 2008 11:34:34 +1000 |
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On Thu, 2008-04-10 at 23:17 +0200, Hans J. Koch wrote: > On Thu, Apr 10, 2008 at 10:08:19PM +0200, Uwe Kleine-König wrote: > > On Thu, Apr 10, 2008 at 02:37:03PM +0200, Uwe Kleine-König wrote: > > > Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.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?
I've seen this kind of thing hacked up by a few people already, mainly as a replacement for /dev/mem. Many people are being scared off using /dev/mem (and rightly so) because - They've seen discussions regarding future plans whereby /dev/mem wouldn't be allowed access to physical memory - They don't have anything like X forcing them to have /dev/mem and therefore want to disable it completely for (perceived?) security reasons.
I like it, it'll sure be used.
--Ben.
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