svn commit: r193159 - head/sys/powerpc/powermac
nwhitehorn at freebsd.org
Mon Jun 1 16:01:09 UTC 2009
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
>> 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.
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