Re: [Patch v6 6/9] cpufreq: tegra194: add OPP support and set bandwidth

[Sumit Gupta]

On 18/04/23 14:43, Viresh Kumar wrote:
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>
> On 11-04-23, 16:29, Sumit Gupta wrote:
> > Add support to use OPP table from DT in Tegra194 cpufreq driver.
> > Tegra SoC's receive the frequency lookup table (LUT) from BPMP-FW.
> > Cross check the OPP's present in DT against the LUT from BPMP-FW
> > and enable only those DT OPP's which are present in LUT also.
> >
> > The OPP table in DT has CPU Frequency to bandwidth mapping where
> > the bandwidth value is per MC channel. DRAM bandwidth depends on the
> > number of MC channels which can vary as per the boot configuration.
> > This per channel bandwidth from OPP table will be later converted by
> > MC driver to final bandwidth value by multiplying with number of
> > channels before sending the request to BPMP-FW.
> >
> > If OPP table is not present in DT, then use the LUT from BPMP-FW
> > directy as the CPU frequency table and not do the DRAM frequency
> > scaling which is same as the current behavior.
> >
> > Now, as the CPU Frequency table is being controlling through OPP
> > table in DT. Keeping fewer entries in the table will create less
> > frequency steps and can help to scale fast to high frequencies
> > when required.
> >
> > Signed-off-by: Sumit Gupta <sumitg@xxxxxxxxxx>
> > ---
> >   drivers/cpufreq/tegra194-cpufreq.c | 156 ++++++++++++++++++++++++++---
> >   1 file changed, 143 insertions(+), 13 deletions(-)
>
> Can this be applied independently of the rest of the series ?
>
> --
> viresh

Yes, this can be applied independently.

Thank you,
Sumit Gupta