kern/43702: hpet* at acpi? needs more work

[Jukka Ruohonen <jruohonen%iki.fi@localhost>]

>Number:         43702
>Category:       kern
>Synopsis:       hpet* at acpi? needs more work
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Aug 04 11:00:01 +0000 2010
>Originator:     Jukka Ruohonen
>Release:        5.0 - HEAD
>Organization:
-
>Environment:
>Description:

Currently hpet(4) -- which, btw, also lacks a manual page -- attachs to
acpi0 based only the PNP/HID -information.  This however does not work on
some ACPI-based systems that expose the HPET information via a so-called
IA-PC High Precision Event Timer Table.

>How-To-Repeat:

Code and DSDT exploration.

>Fix:

Make it optionally attach also via information from the HPET table.