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

Roy Franz (HPE) roy.lists at gmail.com
Fri Apr 15 09:19:42 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: Roy Franz <roy.franz at hpe.com>
> ---
>  drivers/acpi/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
> index 2fcf87a6d270..fa0d319283e3 100644
> --- a/drivers/acpi/Kconfig
> +++ b/drivers/acpi/Kconfig
> @@ -5,7 +5,7 @@
>  menuconfig ACPI
>         bool "ACPI (Advanced Configuration and Power Interface) Support"
>         depends on !IA64_HP_SIM
> -       depends on IA64 || X86 || (ARM64 && EXPERT)
> +       depends on IA64 || X86 || ARM64
>         depends on PCI
>         select PNP
>         default y if (IA64 || X86)
> --
> 2.8.0.rc3
> --
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