Re: [PATCH RESEND] ACPI: processor: Use Apple-specific methods for P/C-states

[Rafael J. Wysocki (Intel)]

On Fri, Oct 30, 2026 at 2:44 AM Atharva Tiwari
<atharvatiwarilinuxdev@xxxxxxxxx> wrote:
>
> > You haven't provided a motivation for the change and I know nothing
> > about Apple platforms, sorry.
>
> APSS provides more P-states than _PSS on apple macs, for example on MacBookPro11,3
>
> _PSS provides 17 P-states ranging from 800Mhz to 2301 Mhz, while
> APSS provides 28 P-states ranging from 800Mhz to 3500 Mhz
>
> Same with ACST, on Xserve3,1 _CST provides 2 C-states (C1, C6)
> while ACST provides 3 C-states (C1, C2, C6).
>
> This is also used in older macs only (before 2015).

Which one is used in older Macs, ACST?

> And also macOS uses these.

Information like the above should go into the patch changelog.