Re: [PATCH v11 5/6] arm64: dts: qcom: monaco: Add OPP-table for ICE UFS and ICE eMMC nodes

Kuldeep Singh <[email protected]>
Newsgroups org.kernel.vger.linux-mmc,org.kernel.vger.linux-arm-msm,org.kernel.vger.linux-devicetree,org.kernel.vger.linux-kernel,org.kernel.vger.linux-scsi
Message-ID <[email protected]>
>>> Since 75 MHz and 201.6 Mhz require the same power level, is the former
>>> OPP any useful?
>>
>> Yes, both use the same power requirements. However recommended by the ICE team,
>> the DT should include all opp/freq supported by the hardware.
> 
> Is there any reason at all where the OS would prefer the lower OPP?
> 
> I think you at one point mentioned some dependency vs the storage
> controller's clock frequency

I think Abhinaba captured all possible frequencies(even lowest ones) as
what the hardware currently describes. It's upto storage controller
running frequency and let it scale ice clocks to higher/lower to it's
max capabilities.

Describing hardware based information also avoid revisiting DTs at later
moment.

-- 
Regards
Kuldeep
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