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(-) Applied. Thanks. -- viresh
