Re: [PATCH/RFC 2/2]ACPI PNP driver

[Bjorn Helgaas <bjorn.helgaas-VXdhtT5mjnY@public.gmane.org>]

On Wednesday 22 September 2004 1:29 pm, Alan Cox wrote:
> On Mer, 2004-09-22 at 19:52, Bjorn Helgaas wrote:
> > PNP currently depends on ISA.  ia64 doesn't set ISA.  So if you
> > pull ACPI support out of serial/floppy/etc, those devices will
> > stop working on ia64.  Are you planning to remove the ISA
> > dependency?
> 
> Please be more precise. There are four kinds of "PnP" at least.
> IEEE1394 (parallel PnP) and serial PnP are independant of ACPI.
> BIOS PnP serves the same purpose and is replaced by the ACPI ability to
> enumerate system devices. ISA PnP enumerates devices on legacy ISA
> busses.

CONFIG_PNP currently depends on CONFIG_ISA.  The patch posted adds
CONFIG_PNPACPI, which depends on CONFIG_PNP (and hence on CONFIG_ISA).

8250_pnp.o is only built if CONFIG_PNP.  ia64 has no support for
CONFIG_ISA, so as things stand today, ia64 can't build 8250_pnp.o.
If I understand Li correctly, he's suggesting that 8250_acpi.o
(which ia64 currently uses) may eventually be removed because 
8250_pnp.o will be sufficient.

Perhaps there's a way to make CONFIG_PNPACPI independent of both
CONFIG_PNP and CONFIG_X86, or at least independent of CONFIG_ISA?


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