Re: [PATCH 2/3] spi / ACPI: add ACPI enumeration support

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[+cc Greg, Peter, Tony since they acked the original patch [1]]

On Thu, Nov 8, 2012 at 1:04 PM, Mika Westerberg
<mika.westerberg@xxxxxxxxxxxxxxx> wrote:
> On Thu, Nov 08, 2012 at 12:32:25PM -0700, Bjorn Helgaas wrote:
>> Struct device_driver is a generic structure, so it seems strange to
>> have to include non-generic things like of_device_id and now
>> acpi_match_table there.
>
> Yes, but in a sense the DT and ACPI are "generic". So that they are used to
> describe the configuration of a machine.

What I meant by "generic" was "useful across all architectures."  The
new acpi_match_table and acpi_handle fields [1] are not generic in
that sense because they're present on all architectures but used only
on x86 and ia64.  The existing of_match_table and of_node are
similarly unused on many architectures.  This doesn't seem like a
scalable strategy to me.  Are we going to add a pnpbios_node for x86
PNPBIOS machines without ACPI, a pdc_hpa for parisc machines with PDC,
etc.?

[1] https://patchwork.kernel.org/patch/1677221/
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