31.08.2020 11:41, Viresh Kumar пишет:

On 31-08-20, 10:54, Dmitry Osipenko wrote:

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31.08.2020 07:39, Viresh Kumar пишет:
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Dmitry, I think there is further scope of simplifying stuff here by
using the opp-microvolt-<name> property and corresponding
dev_pm_opp_set_prop_name() call.

Any inputs on this Dmitry ?

Could you please give an example?

There are many users of it in the kernel. grep for "opp-microvolt-" in
the DT files and you will see.

The use of this property is to specific multiple microvolt properties
to the same frequency without a need to create separate nodes for them
all. The right microvolt property will be selected based on the call
made to dev_pm_opp_set_prop_name(), search for that too in kernel.

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.