I just bought a Raspberry Pi4B with 8 GB of RAM. Apparently, this is an “updated” version of the RPi that can be run at 1.8 GHz (instead of 1.5 GHz) in turbo mode.
You can recognize the board that supports the higher speed by looking for dedicated switch-mode power supply (“switcher”) for the SoC core voltage rail.
Seems like there is also a new revision of the SoC that changes from Rev B0 to Rev C0 (BCM2711C0) but it is unclear whether or not you need to have this revision to be able to use higher clock speed?
Not sure what OS is supposed to do to bump the clock speed but if you look at the article referenced above only latest version of Raspberry OS (Bullseye) supports 1.8 GHz?
From what I understand the new version of the OS automatically tests the presence of the switcher and if found set the freq to 1.8
This is why I was asking if this behavior is or will be done in HAOS
But it is interesting to know that HAOS will use arm_freq if set. Thanks