[PATCHv1 2/3] arm: mvebu: add .dts file for Synology DS213j

Hi Ben,

Ben Peddell [off-list ref] writes:

quoted

quoted

The 5000RPM was interpolated from my measured RPM pulse rate (4200PPM)
of the 80mm fan in my DS211j (which uses the 150-32-35 fan config) at
maximum RPM.

Then, I think I need to change the speed map to have 1900 RPM as max
speed. Out of curiosity, how did you measured the RPM pulse rate
exactly?

I hooked a logic analyzer to the sense pin and measured the pulse rate.

Looking at the specifications of the fan in this unit (an EC7025L12ER),
it has a maximum fan speed of 3000RPM, so it looks like it uses two
pulses per revolution and not one as I had assumed when I created the
speed map.

Thanks for this feedback.

Cheers,

a+