linux-kernel - Re: [PATCH 11/14] drivers: net: dsa: qca8k: apply switch revision fix

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Date:   Sun, 25 Apr 2021 12:45:54 +0800
From:   DENG Qingfang <dqfext@...il.com>
To:     Ansuel Smith <ansuelsmth@...il.com>
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 11/14] drivers: net: dsa: qca8k: apply switch revision fix

Hi Ansuel,

On Sat, Apr 24, 2021 at 11:18:20PM +0200, Ansuel Smith wrote:
> 
> I'm starting to do some work with this and a problem arised. Since these
> value are based on the switch revision, how can I access these kind of
> data from the phy driver? It's allowed to declare a phy driver in the
> dsa directory? (The idea would be to create a qca8k dir with the dsa
> driver and the dedicated internal phy driver.) This would facilitate the
> use of normal qca8k_read/write (to access the switch revision from the
> phy driver) using common function?

In case of different switch revision, the PHY ID should also be different.
I think you can reuse the current at803x.c PHY driver, as they seem to
share similar registers.

> 
> > -- 
> > Florian