[Bug 207419] Add ACPI support for RTC/CMOS device

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=207419

--- Comment #3 from Anthony Jenkins <Scoobi_doo at yahoo.com> ---
The upstream thread actually mirrors the evolution of my OSPM patch.  I first
tried adding code to the ACPICA code, then, based on some helpful suggestions
from acpi@, moved it to the atrtc(4) driver.  I agree with the last thread post
(https://lists.acpica.org/pipermail/devel/2016-February/000874.html) - that
support for RTC/CMOS devices belongs in the OSPM, not in the ACPICA.  If you
look closely at the OP's proposed ACPICA patch, the AcpiOs(Read|Write)Cmos()
handlers are no-ops (Read returns 0, Write does nothing).

I mean I can toss my $0.02 into the thread, but it'll be little more than "I
agree this shouldn't be added to ACPICA"...

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