linux-kernel - Re: [PATCH 00/10] mscc: ocelot: add support for SerDes muxing configuration

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Message-ID: <20180730132441.GC13198@lunn.ch>
Date:   Mon, 30 Jul 2018 15:24:41 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Quentin Schulz <quentin.schulz@...tlin.com>
Cc:     alexandre.belloni@...tlin.com, ralf@...ux-mips.org,
        paul.burton@...s.com, jhogan@...nel.org, robh+dt@...nel.org,
        mark.rutland@....com, davem@...emloft.net, kishon@...com,
        f.fainelli@...il.com, linux-mips@...ux-mips.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, allan.nielsen@...rosemi.com,
        thomas.petazzoni@...tlin.com
Subject: Re: [PATCH 00/10] mscc: ocelot: add support for SerDes muxing
 configuration

> The SerDes configuration is in the middle of an address space (HSIO) that
> is used to configure some parts in the MAC controller driver, that is why
> we need to use a syscon so that we can write to the same address space from
> different drivers safely using regmap.

Hi Quentin

I assume breaking backwards compatibility is not an issue here, since
there currently is only one board using the DT binding. But it would
be good to give a warning in the cover notes. git bisect will also
break for this one particular board. And since these changes are going
through different trees, it could be quite a big break.

	Andrew