Re: [PATCH 3/3] ARM: tegra: Pass multiple versions in opp-supported-hw property

[Viresh Kumar]

On 31-08-20, 12:54, Dmitry Osipenko wrote:
> It's not clear to me how it could be applicable to the Tegra CPU OPP
> because Tegra depends on a combination of SPEEDO + PROCESS versions.
> 
> It's not like all voltages are the same for all OPPs that have the same
> PROCESS ID, otherwise it indeed would be nice to have
> "opp-microvolt-process0", but unfortunately this variant is not suitable
> for Tegra because some freqs have different voltages using the same
> PROCESS ID and the same applies to the SPEEDO ID.

How exactly do you know what voltage belongs to a particular OPP ?

		opp@216000000 {
			clock-latency-ns = <400000>;
			opp-supported-hw = <0x0F 0x0003>;
			opp-hz = /bits/ 64 <216000000>;
			opp-microvolt-fast-process0 = <750000 750000 1125000>;
			opp-microvolt-slow-process0 = <750000 850000 1125000>;

		};

		opp@312000000 {
			clock-latency-ns = <400000>;
			opp-supported-hw = <0x0F 0x0003>;
			opp-hz = /bits/ 64 <312000000>;
			opp-microvolt-fast-process0 = <750000 750000 1125000>;
			opp-microvolt-slow-process0 = <750000 850000 1125000>;
		};

You can make any combinations of such names that come from speedo,
process, or something else. If you can get this done as a fixed
formula then it is workable.

-- 
viresh