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Subject: Re: AP6335 with mainline kernel
To:     Vanessa Maegima <vanessa.maegima@nxp.com>,
        "festevam@gmail.com" <festevam@gmail.com>
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Cc:     "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>,
        "van.ayumi@gmail.com" <van.ayumi@gmail.com>,
        "embed3d@gmail.com" <embed3d@gmail.com>,
        Cameron Kellough <cameron@paloaltoinnovation.com>
From:   Arend van Spriel <arend.vanspriel@broadcom.com>
Message-ID: <05ab43bd-0033-fc45-a992-0a20b91a0e74@broadcom.com>
Date:   Wed, 14 Nov 2018 12:40:57 +0100
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+ Cameron

On 3/26/2018 3:34 PM, Vanessa Maegima wrote:
> On Seg, 2018-03-26 at 09:24 -0300, Vanessa Maegima wrote:
>> Hi Arend,
>>
>>>
>>> Here's the hexdump: http://code.bulix.org/trv3o7-306254
>>>
>> The link above provides the hexdump from the html nvram, which makes
>> wifi work on pico-imx7d.
>>
>> I also got the hexdump of the nvram file provided by TechNexion for
>> comparison, which returns the error "brcmfmac: brcmf_sdio_htclk: HT
>> Avail timeout (1000000): clkctl 0x50": http://code.bulix.org/mw4x62-3
>> 09
>> 095
>
> Fixing second URL: http://code.bulix.org/mw4x62-309095

Hi Vanessa,

It has been a while, but recently I was contacted by Cameron who was 
facing same/similar issue. After some email exchanges with him he 
uncovered that the problem with the TechNexion nvram file is with the 
boardflags3 entry. On my suggestion he change the value from 0x08101188 
to 0x101188. The dropped bit forces the clock hierarchy in the chip to 
select external LPO. I found some schematics showing a 32kHz signal 
hooked up to the LPO input coming from GPIO1_IO03. Could it be that it 
is not properly setup? Devicetree maybe?

Regards,
Arend