Dynamic Frequency Scaling

[zephyrbot]

Reported by Robert Beatty:

As a user of Zephyr I need support for core dynamic frequency scaling so that overall power and performance can be optimized.

(Imported from Jira ZEP-1828)

[zephyrbot]

by Youvedeep Singh:

Hi Robert Beatty

Can you please clarify on following-
Are we looking here for implementation for frequency governor (something like cpufreq/ondemand governor present in Linux side) ?
Which SOC we are targeting for this feature ?

My understating is main power saving comes from scaling Voltage as
Power consumption = C * V ^2 *f.
So main power consumption will come on scaling of frequency and Voltage.
Also we need sustainable voltage incase we want to increase the frequency.

[zephyrbot]

by Robert Beatty:

Youvedeep Singh , I'll respond via direct email.

[zephyrbot]

by Youvedeep Singh:

De priortizing this story as we do not have any device which support dynamic voltage and freq.

[ramakrishnapallala]

deprioritized, we will revisit again based on the requirement and DVFS supported HW.