linux-kernel - Re: [PATCH] ARM: dts: ls1021a: Specify TBIPA register address

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Date:   Sun, 08 Apr 2018 12:45:09 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     esben.haabendal@...il.com
Cc:     netdev@...r.kernel.org, robh+dt@...nel.org, mark.rutland@....com,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        claudiu.manoil@...escale.com, garsilva@...eddedor.com, eha@...f.com
Subject: Re: [PATCH] ARM: dts: ls1021a: Specify TBIPA register address

From: Esben Haabendal <esben.haabendal@...il.com>
Date: Fri,  6 Apr 2018 14:46:35 +0200

> From: Esben Haabendal <eha@...f.com>
> 
> The current (mildly evil) fsl_pq_mdio code uses an undocumented shadow of
> the TBIPA register on LS1021A, which happens to be read-only.
> Changing TBI PHY address therefore does not work on LS1021A.
> 
> The real (and documented) address of the TBIPA registere lies in the eTSEC
> block and not in MDIO/MII, which is read/write, so using that fixes
> the problem.
> 
> Signed-off-by: Esben Haabendal <eha@...f.com>

Applied.