newbus ioport usage

[Nate Lawson]

On Mon, 26 Jan 2004, M. Warner Losh wrote:
> In message: <20040126165523.W30461 at root.org>
>             Nate Lawson <nate at root.org> writes:
> : Ok, I'm doing the set/alloc and it works.  However, one weird thing.  If I
> : allocate all ports at boot time, it succeeds.  My driver goes through
> : multiple release/allocate cycles and it all works as expected.  However if
> : I boot and attach to only one of the registers, subsequent attempts to
> : attach the second one fail.  The resources are 2 IO ports, 0x101c and
> : 0x101d.  Both are 1 byte.
>
> Deos devinfo -r show any cause for the problem?  Maybe you aren't
> releasing them properly?  Also, why not allocate them as a block of 2?

I'll look into that.  I can't allocate them in one block as they come and
go, based on system state.  In one state, one is available and in another,
both are available.  If I boot while only one is available and then you
plug in the AC adapter, new ones appear.  This is acpi, btw.

-Nate