On Thu, Jun 5, 2014 at 3:26 AM, Kalle Valo [off-list ref] wrote:

Andy Lutomirski [off-list ref] writes:

quoted

On Thu, May 29, 2014 at 12:48 AM, Michal Kazior [off-list ref] wrote:

quoted

+ath10k@lists.infradead.org

On 28 May 2014 20:35, Andy Lutomirski [off-list ref] wrote:

quoted

It dies with 'otp calibration failed: 2'.

Some older version of the driver seemed to work fine.

ath10k did not verify otp result before so it could load successfully
despite errors.

Someone raised this problem yesterday on IRC. I'm not really sure how
we should deal with this properly.

Ideally, someone from Atheros could figure out what the error is.

Michal already did. The error means that for some reason the
calibaration data was not found from OTP. OTP is the storage area where
the calibration data is normally stored within QCA9880.

Ah -- I misunderstood.  I assumed that the OTP read was failing
mysteriously and that expert input was needed to resolve that mystery
:)

quoted

Barring that, the card seems to work okay without otp (I don't even
know what otp is), so just warning and continuing to load might be
better than bailing.

This means that your card is not properly calibrated and it doesn't
function in an optimal way (for example range or throughput is less than
what it could be).

Do you see that with all Archer C7 v2 devices or with just one? One
possibility is that the calibration data is actually stored outside of
QCA9880 board, for example in the host flash or similar. I don't have
that AP, can someone else see where the calibration data is stored?

I only have one of these.  I put a likely looking directory of the GPL
sources here:

http://web.mit.edu/luto/www/archerc7_gpl/atheros/

I'm not entirely sure what I'm looking for, but this might be it:

http://web.mit.edu/luto/www/archerc7_gpl/atheros/otp.c

I don't really know what I'm looking for, though.

--Andy