netdev - Re: Ethernet not working on a different SoC with same eth HW

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Date:   Tue, 8 Nov 2016 16:41:23 +0100
From:   Mason <slash.tmp@...e.fr>
To:     netdev <netdev@...r.kernel.org>
Cc:     Mans Rullgard <mans@...sr.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Timur Tabi <timur@...eaurora.org>,
        Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        Zefir Kurtisi <zefir.kurtisi@...atec.com>,
        Martin Blumenstingl <martin.blumenstingl@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Uwe Kleine-Konig <u.kleine-koenig@...gutronix.de>,
        Daniel Mack <zonque@...il.com>,
        Sebastian Frias <sf84@...oste.net>
Subject: Re: Ethernet not working on a different SoC with same eth HW

On 31/10/2016 16:29, Mason wrote:

> I'm using these net drivers:
> 
>   drivers/net/ethernet/aurora/nb8800.c
>   drivers/net/phy/at803x.c
> 
> With a smp8758 board, they work great.
> I've been trying to use them on a different board:
> 
>   same eth PHY (Atheros AR8035)
>   same eth MAC (Aurora SSN8800)
>   different SoC (same base address for MAC block)
> 
> It doesn't work, and I'm not sure where to look first...

Sweet baby Jesus on a pogo stick...

After oh-so-many days making increasingly random changes,
hoping something would magically un-break, we did find a
*local* commit for an exotic platform (chip emulator) that
was causing the issue.

Regards.