netdev - Re: [PATCH net-next v2 1/2] dt-bindings: dsa: Rewrite Micrel KS8995 in schema

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <657d5801-5b4d-4a82-ae16-124d833dc393@lunn.ch>
Date: Wed, 25 Jun 2025 09:55:17 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Linus Walleij <linus.walleij@...aro.org>
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>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Imre Kaloz <kaloz@...nwrt.org>,
	Frederic Lambert <frdrc66@...il.com>,
	Gabor Juhos <juhosg@...nwrt.org>,
	Philipp Zabel <p.zabel@...gutronix.de>, netdev@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH net-next v2 1/2] dt-bindings: dsa: Rewrite Micrel KS8995
 in schema

On Wed, Jun 25, 2025 at 08:51:24AM +0200, Linus Walleij wrote:
> After studying the datasheets for some of the KS8995 variants
> it becomes pretty obvious that this is a straight-forward
> and simple MII DSA switch with one port in (CPU) and four outgoing
> ports, and it even supports custom tags by setting a bit in
> a special register, and elaborate VLAN handling as all DSA
> switches do.
> 
> What is a bit odd with KS8995 is that it uses an extra MII-P5
> port to access one of the PHYs separately, on the side of the
> switch fabric, such as when using a WAN port separately from
> a LAN switch in a home router.
> 
> Rewrite the terse bindings to YAML, and move to the proper
> subdirectory. Include a verbose example to make things clear.
> 
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>

The way this 5th PHY is used is different to any other switch i have
seen. By following phandles, i think there is enough information to
work out how to configure it.

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew