Date: Mon, 01 Jun 2009 18:01:04 +0200 From: Nathan Whitehorn <nwhitehorn@freebsd.org> To: John Baldwin <jhb@freebsd.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r193159 - head/sys/powerpc/powermac Message-ID: <4A23FB40.1050405@freebsd.org> In-Reply-To: <200906010822.19951.jhb@freebsd.org> References: <200905311002.n4VA2K6c037776@svn.freebsd.org> <200906010822.19951.jhb@freebsd.org>
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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. -Nathan
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