On Tuesday 17 April 2007 12:53 pm, David Brownell wrote:
> On Friday 13 April 2007 8:59 am, Pavel Machek wrote:
>
> > ...
> > > Assuming they all adopt that same "parallel tree" model, that seems
> > > like a good idea. The tools will likely need to understand how ACPI
> > > and OF differ, but there's no point in reserving more names than we
> > > really need. Though it may be that "parallel trees" should go away.
> >
> > If mapping is indeed 1-to-1 in acpi... it would be nice to just merge
> > the trees.
>
> Could you elaborate a bit ... what do you mean by "merge"?
>
> One way to merge the trees would be to relocate
>
> /sys/devices/pci* --> ... this *HAS* a PNP node
> /sys/devices/pnp*/X --> /sys/devices/acpi_system*/.../X
>
> Not having the PCI root be its PNPACPI node seems more buglike
> to me than anything else. And for other nodes...
Looks like the i8042 serial nodes will be bizarre too:
/sys/devices/pnp0/00:09
... touchpad's PNP node
/sys/devices/acpi_system:00/device:00/PNP0A03:00/device:15/PNP0F13:00
... its ACPI node
/sys/devices/platform/i8042/serio4
... its serio node
That seems like two nodes too many, but without me trying to twist
my mind around i8042 issues, I can't quite speculate why struct
serio "is-a" device rather than "has-a" device (the PNP node) as
would be the case with a more normal driver structure.
But the existence of that device_add() in serio.c sure explains why
the PNP node doesn't get associated with the input class device one
would expect from knowing that 00:09 is the touchpad.
And hmm, just this morning I saw email from Greg re-affirming that
drivers should not device_add(). Converting such legacy drivers is
simple though, right? :)
- Dave
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
