[PATCH 2/3] ACPI / ARM64: Remove EXPERT dependency for ACPI on ARM64

Olof Johansson olof at lixom.net
Fri Apr 15 10:48:50 PDT 2016

On Fri, Apr 15, 2016 at 12:53 AM, Mark Brown <broonie at kernel.org> wrote:
> When ACPI was originally merged for arm64 it had only been tested on
> emulators and not on real physical platforms and no platforms were
> relying on it.  This meant that there were concerns that there might be
> serious issues attempting to use it on practical systems so it had a
> dependency on EXPERT added to warn people that it was in an early stage
> of development with very little practical testing.  Since then things
> have moved on a bit.  We have seen people testing on real hardware and
> now have people starting to produce some platforms (the most prominent
> being the 96boards Cello) which only have ACPI support and which build
> and run to some useful extent with mainline.
> This is not to say that ACPI support or support for these systems is
> completely done, there are still areas being worked on such as PCI, but
> at this point it seems that we can be reasonably sure that ACPI will be
> viable for use on ARM64 and that the already merged support works for
> the cases it handles.  For the AMD Seattle based platforms support
> outside of PCI has been fairly complete in mainline a few releases now.
> This is also not to say that we don't have vendors working with ACPI who
> are trying do things that we would not consider optimal but it does not
> appear that the EXPERT dependency is having a substantial impact on
> these vendors.
> Given all this it seems that at this point the EXPERT dependency mainly
> creates inconvenience for users with systems that are doing the right
> thing and gets in the way of including the ACPI code in the testing that
> people are doing on mainline.  Removing it should help our ongoing
> testing cover those platforms with only ACPI support and help ensure
> that when ACPI code is merged any problems it causes for other users are
> more easily discovered.
> Signed-off-by: Mark Brown <broonie at kernel.org>
> Acked-by: Graeme Gregory <graeme.gregory at linaro.org>
> Acked-by: Ard Biesheuvel <ard.biesheuvel at linaro.org>
> Reviewed-by: Al Stone <ahs3 at redhat.com>
> Acked-by: Hanjun Guo <hanjun.guo at linaro.org>
> Acked-by: Catalin Marinas <catalin.marinas at arm.com>

Acked-by: Olof Johansson <olof at lixom.net>


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