From: Caleb James DeLisle <cjd@cjdns.fr>
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 <cjd@cjdns.fr>
Subject: [PATCH v4 2/7] dt-bindings: net: dsa: mediatek,mt7530: describe 'passthrough' hierarchy
Date: Thu, 29 Oct 2026 18:41:57 +0000 [thread overview]
Message-ID: <20261029184202.1859843-3-cjd@cjdns.fr> (raw)
In-Reply-To: <20261029184202.1859843-1-cjd@cjdns.fr>
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 <cjd@cjdns.fr>
---
.../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
next prev parent reply other threads:[~2026-10-29 18:42 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-29 18:41 [PATCH v4 0/7] net: dsa: mt7530: support EcoNet EN751221 Caleb James DeLisle
2026-10-29 18:41 ` [PATCH v4 1/7] net: dsa: mt7530: get ctrl phy addr using a function Caleb James DeLisle
2026-10-29 18:41 ` Caleb James DeLisle [this message]
2026-10-29 18:41 ` [PATCH v4 3/7] net: dsa: mediatek: add support for passthrough mode Caleb James DeLisle
2026-10-29 18:41 ` [PATCH v4 4/7] net: dsa: mediatek: support PLL setup on MMIO MT7530 Caleb James DeLisle
2026-10-29 18:42 ` [PATCH v4 5/7] net: dsa: mediatek: support MDIO switch downstream of MMIO switch Caleb James DeLisle
2026-10-29 18:42 ` [PATCH v4 6/7] dt-bindings: net: dsa: mediatek,mt7530: add EcoNet EN751221 switches Caleb James DeLisle
2026-10-29 18:42 ` [PATCH v4 7/7] net: dsa: mediatek: support EN751221 switch Caleb James DeLisle
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