svn commit: r193159 - head/sys/powerpc/powermac
jhb at freebsd.org
Mon Jun 1 17:25:30 UTC 2009
On Monday 01 June 2009 12:01:04 pm Nathan Whitehorn wrote:
> John Baldwin wrote:
> > On Sunday 31 May 2009 6:02:20 am Nathan Whitehorn wrote:
> >> Author: nwhitehorn
> >> Date: Sun May 31 10:02:20 2009
> >> New Revision: 193159
> >> URL: http://svn.freebsd.org/changeset/base/193159
> >> Log:
> >> Provide an analogous sysctl to hw.acpi.acline (dev.pmu.0.acline) to
> >> determine whether the computer is plugged in to mains power.
> > I wonder if it would be a good idea to introduce a
> > platform-independent 'acline' sysctl? Something like 'hw.acline'? For now
> > we could simply have these devices create it. We could do something fancier
> > where AC adapter drivers register with a centralized thingie at some point
> > and it exports a global setting that is true so long as at least one adapter
> > is online. I'm not sure that level of complexity is warranted until we have
> > platforms with multiple AC lines exposed to the OS though.
> That would be nice, and easy to implement, though the existing one
> should be kept for a while for compatibility. In the longer term, pmu(4)
> also provides an ACPI-alike interface to battery status under dev.pmu.*,
> which it would likewise be good to report in a platform-independent way.
Yes, the existing names would have to stay around for a while for compatability.
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