Hi Arnd,
On Fri, May 9, 2014 at 10:45 AM, Arnd Bergmann <arnd@xxxxxxxx> wrote:
> On Friday 09 May 2014 10:28:39 Lucas Stach wrote:
>> Am Freitag, den 09.05.2014, 08:58 +0200 schrieb Arnd Bergmann:
>> > The pci-rcar driver is enabled for compile tests, and this has
>> > now shown that the driver cannot build without CONFIG_OF,
>> > following the inclusion of f8f2fe7355fb "PCI: rcar: Use new OF
>> > interrupt mapping when possible":
>> >
>> > drivers/built-in.o: In function `rcar_pci_map_irq':
>> > :(.text+0x1cc7c): undefined reference to `of_irq_parse_and_map_pci'
>> >
>> > As pointed out by Ben Dooks and Geert Uytterhoeven, this is actually
>> > supposed to build fine, which we can achieve if we make the
>> > declaration of of_irq_parse_and_map_pci conditional on CONFIG_OF
>> > and provide an empty inline function otherwise, as we do for
>> > a lot of other of interfaces.
>> >
>> > This lets us build the rcar_pci driver again without CONFIG_OF,
>> > which won't work but give us compile time coverage.
>> >
>> This part of the commit message is confusing. The driver is explicitly
>> written to fall back to a platform irq when OF interrupt mapping doesn't
>> work (return 0 or error), to keep non DT enabled boards working.
>>
>> I hadn't thought of the compile time dependency, so thanks for fixing
>> this up.
>
> I thought it was meant to keep old DTBs working. AFAIK, there is no
> legacy board file support for rcar-gen2, so we don't actually have to
> worry about that.
arch/arm/mach-shmobile/board-lager.c does intantiate platform devices
for it, and I guess they're still to be added to .../board-koelsch.c.
However, all legacy board configs in arch/arm/mach-shmobile/Kconfig
do "select USE_OF", so the file will always be build with OF=y.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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