Re: [linux-fbdev] Retrace

On Tue, Feb 8, 2000, Gabriel Paubert [off-list ref] wrote:

deviobase = ioport_ptr(dev->resource[0]);

data = inl(deviobase+register_offset);

and for an MMIO mapped area:

mmioptr = ioremap(ioremap_ptr(dev->resource[1]));

data = readl(mmioptr+register_offset);

Is it possible to "walk up" the resource tree from dev->resource[0] ? I
mean, the ioport_ptr function, to work on those weird Apple bridges, need
to go thru a special routine that looks up the device in OF device tree
to find out on which sub-bridge it is.
In order to do that, it needs the pci dev_fn. Can this be retreived from
dev->resource[0] ?

Also, this doesn't solve the userland problem.


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