Messages in this thread | | | Date | Tue, 31 May 2022 16:00:29 +0530 | From | Viresh Kumar <> | Subject | Re: [RFC PATCH v2 4/6] PM: opp: allow control of multiple clocks |
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On 19-05-22, 10:03, Krzysztof Kozlowski wrote: > Yes, true. The clock frequencies are still changed with each gear, but > in general the UFS indeed operates on gear concept.
Hi Krzysztof,
I have redesigned the OPP core a bit (two patchsets until now) to make it easier to add multiple clock support going forward. I need some inputs from you before moving forward with it now. Will this work for your use case:
- Add support for multiple clocks, where none of them is primary.
- Which means you won't be able to use dev_pm_opp_set_rate() but will need something like dev_pm_opp_set_level(), will add it.
- That is, your OPP table will need to implement levels (I think of them as UFS gears) and then call dev_pm_opp_set_level() instead.
- This new API will work just like dev_pm_opp_set_rate(), except that it will find the target OPP based on level instead of freq and support configuration of multiple clock frequencies.
- Of course both these APIs will share most of the code.
-- viresh
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