Re: [linux-fbdev] Re: request_region for MMIO?
Geert Uytterhoeven (Geert.Uytterhoeven@cs.kuleuven.ac.be)
Mon, 1 Feb 1999 14:33:27 +0100 (CET)
On 1 Feb 1999, Jes Sorensen wrote:
> >>>>> "Geert" == Geert Uytterhoeven <Geert.Uytterhoeven@cs.kuleuven.ac.be> writes:
> Geert> On 1 Feb 1999, Jes Sorensen wrote:
> >> >>>>> "Geert" == Geert Uytterhoeven
> >> <Geert.Uytterhoeven@cs.kuleuven.ac.be> writes:
> Geert> Is it OK to use request_region() for claiming memory mapped I/O
> Geert> registers?
> >> Certainly not.
> >>
> Geert> Is there any good reason why
>
> Oh did I get you wrong here, do you mean PCI I/O registers that just
> happen to be mem mapped on non x86 architectures or do you actually
> mean PCI shared memory type registers?
I mean anything I can map with ioremap(). Before I map it, I have to make sure
it's not yet in use by a(nother) driver. For I/O ports, we have
request_region() for that purpose.
Greetings,
Geert
--
Geert Uytterhoeven Geert.Uytterhoeven@cs.kuleuven.ac.be
Wavelets, Linux/{m68k~Amiga,PPC~CHRP} http://www.cs.kuleuven.ac.be/~geert/
Department of Computer Science -- Katholieke Universiteit Leuven -- Belgium
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