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Subject: Re: [PATCH v3] ath9k: fix firmware bug in some Mikrotik R11e-2HPnD
 cards
To:     Denis Kalashnikov <denis281089@gmail.com>
Cc:     linux-wireless@vger.kernel.org, Kalle Valo <kvalo@codeaurora.org>
References: <20200110132142.7737-1-denis281089@gmail.com>
 <aab66c75-49ae-0955-03a8-f817685b0925@nbd.name>
 <CAKoLU8P3MyauCUevcRHtzMj8HSZQLD-hYyEaZyRH9OfLye6knQ@mail.gmail.com>
From:   Felix Fietkau <nbd@nbd.name>
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Date:   Mon, 13 Jan 2020 17:27:38 +0100
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On 2020-01-13 15:13, Denis Kalashnikov wrote:
> I read value from the SREV register of AR9582 -- got 0x001c04ff. I
> looked through the code of ath9k and found out that in this case the
> revision is 4. So, since AR_SREV_REVISION_9580_10 is defined as 4, I
> logically concluded that AR_SREV_9580_10 would do the job. But you
> suspicions turned to be right. I tested AR9580 now and it has the same
> value as AR9582 in the SREV register -- 0x001c04ff. PCI Subsystem ID
> is zero on those Mikrotik cards, so it is not useful. Felix, guys, may
> be somebody have any thoughts how we can distinguish AR9582? Or that a
> chip has only 2 chains? May be values from other registers?
I'm not aware of any register that would have this information. Maybe
you could send those cards back to Mikrotik because they have faulty
EEPROM data?

- Felix