From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=5.135.140.105 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793299346; b=D5EVwwEvrH18EBfJdZr0ZEazc6t5terQkG2h24FCv+eHGceWmz9tKsSuyqbAVdHr/NiF 8j+7VP/zOy3BBF/yviSrxxNtvw6jWsHG1vUF93Qf/VTZCEdP8WfcKCgCUSKEiBqA6gycc 2rLFTS5Y9emEcGinplELGQGO446IYpJ2uHabKd7ehefOTgGDz3YEzOPBJp4WSwnEVPchk fmG1wKzuMa4O6ohnafVy0h/V2gsva3SS/bEVFblUitAcJvKyDB+RVKPXaCIQL6q3oK+WL xHhyoQlVfBb8DYK37rCi4hQ+5aYATlODVP/5PrjkrXZy8slq7GuPo2eBHwEf1rWUrUg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793299346; h=DMARC-Filter:Received:DKIM-Signature:From:To:Cc:Subject:Date: Message-Id:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding:X-Last-TLS-Session-Version; bh=VY1Y9Wrs674y7GrLGEyeMMqNpydE7jf2tJurMnaK9fI=; b=VaU9WQp+XE05Ug+aOnoPnzG0Gp8Vpvpdi/TF+IcVDCIFE1TslqF4VL0B6VJu0NVGqOQQ G0EnwfoXaqOPSYP5e/34iLPPpGh0rQ5ZlHVzyd3Ax2L6bfM6618IYlDZX/zKDZ8Ra24d+ Uwck2y5mqpOYYdREQGzvoHvrEBx/Uh1lyGFb34lA7d8S+tkQNSoacRcKFO6zyIxH7E8yk Sb8RzDbetQQnn2vgxn5FEI6sWCHt2V8utONznGwfwmMn0BLXkrRcMII3LYO3l5M+KkRWh 9GhwPNB2seWPBl0tPGH7T6u/xZl4Q4qx816zfA6+SVkDPgVeh7IsVqgbnAUXLgEMwEA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=cjdns.fr; spf=pass smtp.mailfrom=cjdns.fr; dkim=pass header.d=cjdns.fr header.i=@cjdns.fr header.a=rsa-sha256 header.s=dkim header.b=NELsSHRp; arc=none smtp.remote-ip=5.135.140.105 Received: from mail.cjdns.fr (mail.cjdns.fr [5.135.140.105]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 185B7606A31F; Thu, 29 Oct 2026 18:42:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 185B7606A31F Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=cjdns.fr Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=cjdns.fr Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=cjdns.fr header.i=@cjdns.fr header.a=rsa-sha256 header.s=dkim header.b=NELsSHRp Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id D73911AA31C; Thu, 29 Oct 2026 19:42:20 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cjdns.fr; s=dkim; t=1793299343; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding:in-reply-to:references; bh=VY1Y9Wrs674y7GrLGEyeMMqNpydE7jf2tJurMnaK9fI=; b=NELsSHRpm5LMd7qDM9rSeMlKqQW3jloxpskiGZPcQDDu5LUaXRnYaRO8nRknwkxWRK6GhL ssJngc4y5g81ySxtxmdRMic2waS/UCNYnHWv/sacCFj7yCK2YJjvz5ndtxd7YWwXvYVObr 3EjnNGt17JMV7owm/JsHVaav/Xk5KF3KsBGGyCGDXX0IV+Hp5+NfJlYh7x4dRgplm28qDX QGKoqGR1yHNa0hJqqdkpS4VsnkYTSlKk5qZbCkqyKZm+Fow3voVxlBRf+jkwLuPRTNeHan pdHq7H+d0Mqd0nJqbFdLzKkzVGoSJpW97XWRGNIxs8GLR0Zci6cYiKZ2kl4ydg== From: Caleb James DeLisle To: netdev@vger.kernel.org Cc: andrew@lunn.ch, olteanv@gmail.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, chester.a.unal@arinc9.com, daniel@makrotopia.org, linux@armlinux.org.uk, arinc.unal@arinc9.com, Landen.Chao@mediatek.com, dqfext@gmail.com, sean.wang@mediatek.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, naseefkm@gmail.com, b.larsson@gmx.com, Caleb James DeLisle Subject: [PATCH v4 2/7] dt-bindings: net: dsa: mediatek,mt7530: describe 'passthrough' hierarchy Date: Thu, 29 Oct 2026 18:41:57 +0000 Message-Id: <20261029184202.1859843-3-cjd@cjdns.fr> In-Reply-To: <20261029184202.1859843-1-cjd@cjdns.fr> References: <20261029184202.1859843-1-cjd@cjdns.fr> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Last-TLS-Session-Version: TLSv1.3 Due to hardware limitations, full switch hierarchies are not supported with DSA based on the mt7530 DSA tag, however it does support a simplified hierarchy in which one or more switches act as passthrough conduits with only one CPU port and one DSA port active. Document this capability. Signed-off-by: Caleb James DeLisle --- .../devicetree/bindings/net/dsa/mediatek,mt7530.yaml | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml index 90b3582b7619..f98b9113ad12 100644 --- a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml +++ b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml @@ -73,6 +73,11 @@ description: | Check out example 7. + The MT7530 and MT7531 switches offer limited support for switch hierarchies, + particularly in the case where one or more switches have only one upstream + and one downstream port, and can act as blind pass-throughs to a fully + featured switch downstream. + properties: compatible: oneOf: -- 2.39.5