On 09-10-20, 12:10, Nicola Mazzucato wrote: > I thought about it and looked for other platforms' DT to see if can reuse > existing opp information. Unfortunately I don't think it is optimal. The reason > being that, because cpus have the same opp table it does not necessarily mean > that they share a clock wire. It just tells us that they have the same > capabilities (literally just tells us they have the same V/f op points). No. > Unless I am missing something? Yes. Here are the different scenarios which can happen. - Two CPUs have separate OPP tables, even if they are exact copy of each other, these CPUs don't share a clock line, but just v/f points as you said. - Two CPUs use the same OPP table, i.e. both point to it, but "opp-shared" property is missing. This is same as above case. They just share the v/f points and this is the preferred way instead of duplicate OPP tables. - Case two with "opp-shared" property present in the OPP table. The CPUs share clock-lines. And this is exactly how we find out today if CPUs share a policy or not. -- viresh
