num_rf_chains problem

Kalle Valo kvalo at
Mon Dec 22 23:52:42 PST 2014

Wilco Baan Hofman <wilco at> writes:

> I'm currently setting up openwrt with the latest git ath10k on the
> Engenius ESR1750.
> A couple of things are off:
> - My chip shipped with regdomain code 0x00
> - OTP calibration is missing?
> - DFS pattern detector is not working, possibly because of OTP missing
> - num_rf_chains is reported as 2, which is wrong, it should be 3.

Most likely the calibration data is somewhere in the host flash (a small
MTD partion), there are already products which do that. The size of the
calibration data should be 2116 bytes.

That would explain why the OTP in the chip itself is empty.

Kalle Valo

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