Messages in this thread | | | Date | Thu, 27 Dec 2012 10:51:40 +0100 | Subject | Re: What does ISA/PCI really mean to ARM architecture? | From | Geert Uytterhoeven <> |
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On Thu, Dec 27, 2012 at 9:27 AM, Woody Wu <narkewoody@gmail.com> wrote: > Can a peripheral chip that claims to be ISA or PCI device be used in a > ARM based embedded system? For these kind of chips, I only concern > about the planar kind of devices, means they are not on a dedicated > expansion card. > > From hardware point of view, to attach a ISA or PCI planar chip, is > there any requirement need to fulfill on a ARM bard? > > From Linux driver point of view, what are needed to support an ISA or > PCI driver in ARM architecture? More important, is ISA or PCI device a > platform device? If not, how to add these kind of devices in my board > definition?
An ISA device is typically a platform device. For ARM, which uses device trees, this means you define it in the device tree.
A PCI device is not a platform device, as devices on a PCI bus can be probed automatically. The PCI host bridge is typically a platform device, though, so it it should be in your device tree.
Gr{oetje,eeting}s,
Geert
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
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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