On Fri, Apr 15, 2016 at 12:53 AM, Mark Brown <broonie@xxxxxxxxxx> 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@xxxxxxxxxx> > Acked-by: Graeme Gregory <graeme.gregory@xxxxxxxxxx> > Acked-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx> > Reviewed-by: Al Stone <ahs3@xxxxxxxxxx> > Acked-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx> > Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx> Acked-by: Olof Johansson <olof@xxxxxxxxx> -Olof -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
