From: Lorenzo Bianconi <lorenzo@kernel•org>
To: Andrew Lunn <andrew+netdev@lunn•ch>,
"David S. Miller" <davem@davemloft•net>,
Eric Dumazet <edumazet@google•com>,
Jakub Kicinski <kuba@kernel•org>,
Paolo Abeni <pabeni@redhat•com>, Rob Herring <robh@kernel•org>,
Krzysztof Kozlowski <krzk+dt@kernel•org>,
Conor Dooley <conor+dt@kernel•org>,
Lorenzo Bianconi <lorenzo@kernel•org>
Cc: Christian Marangi <ansuelsmth@gmail•com>,
Benjamin Larsson <benjamin.larsson@genexis•eu>,
linux-arm-kernel@lists•infradead.org,
linux-mediatek@lists•infradead.org, netdev@vger•kernel.org,
devicetree@vger•kernel.org
Subject: [PATCH net-next v9 1/6] dt-bindings: net: airoha: Add GDM port ethernet child node
Date: Wed, 03 Jun 2026 08:00:15 +0200 [thread overview]
Message-ID: <20260603-airoha-eth-multi-serdes-v9-1-5d476bc2f426@kernel.org> (raw)
In-Reply-To: <20260603-airoha-eth-multi-serdes-v9-0-5d476bc2f426@kernel.org>
EN7581 and AN7583 SoCs support connecting multiple external SerDes to GDM3
or GDM4 ports via a hw arbiter that manages the traffic in a TDM manner.
As a result multiple net_devices can connect to the same GDM{3,4} port
and there is a theoretical "1:n" relation between GDM ports and
net_devices.
Introduce the ethernet node child of a specific GDM port in order to model
a given net_device that is connected via the external arbiter to the
GDM{3,4} port. This new ethernet node is defined by the "airoha,eth-port"
compatible string. Please note GDM1 and GDM2 does not support the
connection with the external arbiter and they are represented by an
ethernet node defined by the "airoha,eth-mac" compatible string.
Reviewed-by: Rob Herring (Arm) <robh@kernel•org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel•org>
---
.../devicetree/bindings/net/airoha,en7581-eth.yaml | 56 +++++++++++++++++++++-
1 file changed, 55 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/net/airoha,en7581-eth.yaml b/Documentation/devicetree/bindings/net/airoha,en7581-eth.yaml
index fbe2ddcdd909..17fe2edf4886 100644
--- a/Documentation/devicetree/bindings/net/airoha,en7581-eth.yaml
+++ b/Documentation/devicetree/bindings/net/airoha,en7581-eth.yaml
@@ -130,6 +130,42 @@ patternProperties:
maximum: 4
description: GMAC port identifier
+ allOf:
+ - if:
+ properties:
+ reg:
+ contains:
+ items:
+ - enum:
+ - 3
+ - 4
+ then:
+ properties:
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ patternProperties:
+ "^ethernet@[0-5]$":
+ type: object
+ unevaluatedProperties: false
+ $ref: ethernet-controller.yaml#
+ description: External ethernet port ID available on the GDM port
+
+ properties:
+ compatible:
+ const: airoha,eth-port
+
+ reg:
+ maximum: 5
+ description: External ethernet port identifier
+
+ required:
+ - reg
+ - compatible
+
required:
- reg
- compatible
@@ -191,9 +227,27 @@ examples:
#address-cells = <1>;
#size-cells = <0>;
- mac: ethernet@1 {
+ ethernet@1 {
compatible = "airoha,eth-mac";
reg = <1>;
};
+
+ ethernet@4 {
+ compatible = "airoha,eth-mac";
+ reg = <4>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ethernet@0 {
+ compatible = "airoha,eth-port";
+ reg = <0>;
+ };
+
+ ethernet@1 {
+ compatible = "airoha,eth-port";
+ reg = <1>;
+ };
+ };
};
};
--
2.54.0
next prev parent reply other threads:[~2026-06-03 6:01 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-03 6:00 [PATCH net-next v9 0/6] net: airoha: Support multiple net_devices connected to the same GDM port Lorenzo Bianconi
2026-06-03 6:00 ` Lorenzo Bianconi [this message]
2026-06-03 6:00 ` [PATCH net-next v9 2/6] net: airoha: Remove private net_device pointer in airoha_gdm_dev struct Lorenzo Bianconi
2026-06-03 6:00 ` [PATCH net-next v9 3/6] net: airoha: Support multiple net_devices for a single FE GDM port Lorenzo Bianconi
2026-06-04 8:41 ` Lorenzo Bianconi
2026-06-03 6:00 ` [PATCH net-next v9 4/6] net: airoha: Do not stop GDM port if it is shared Lorenzo Bianconi
2026-06-03 6:00 ` [PATCH net-next v9 5/6] net: airoha: Introduce WAN device flag Lorenzo Bianconi
2026-06-03 6:00 ` [PATCH net-next v9 6/6] net: airoha: Support multiple LAN/WAN interfaces for hw MAC address configuration Lorenzo Bianconi
2026-06-04 9:20 ` Lorenzo Bianconi
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