netdev - Re: [PATCH net-next 4/4] net: dsa: ks8995: Add basic switch set-up

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Message-ID: <CACRpkdYO=HuGou5OWkyCQH+7Uu98k3eqjfTYiCvEpjFiN+2MCg@mail.gmail.com>
Date: Tue, 19 Aug 2025 14:30:10 +0200
From: Linus Walleij <linus.walleij@...aro.org>
To: Andrew Lunn <andrew@...n.ch>
Cc: Vladimir Oltean <olteanv@...il.com>, "David S. Miller" <davem@...emloft.net>, 
	Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	Heiner Kallweit <hkallweit1@...il.com>, Russell King <linux@...linux.org.uk>, netdev@...r.kernel.org
Subject: Re: [PATCH net-next 4/4] net: dsa: ks8995: Add basic switch set-up

On Sat, Aug 16, 2025 at 1:12 AM Andrew Lunn <andrew@...n.ch> wrote:

> > +static enum
> > +dsa_tag_protocol ks8995_get_tag_protocol(struct dsa_switch *ds,
> > +                                      int port,
> > +                                      enum dsa_tag_protocol mp)
> > +{
> > +     /* This switch actually uses the 6 byte KS8995 protocol */
> > +     return DSA_TAG_PROTO_NONE;
>
> Is this protocol documented somewhere?

Yeah it's in the datasheets, albeit in text and not with proper binary
descriptions and examples of how the special tag should look etc :/

My plan is to implement the custom DSA tag if I can get around to
painstakingly trial-and-error-implement it.

Yours,
Linus Walleij