linux-kernel - [PATCH net-next v2 1/8] dt-bindings: net: ti,rpmsg-eth: Add DT binding for RPMSG ETH

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Message-ID: <20250902090746.3221225-2-danishanwar@ti.com>
Date: Tue, 2 Sep 2025 14:37:39 +0530
From: MD Danish Anwar <danishanwar@...com>
To: Andrew Lunn <andrew+netdev@...n.ch>,
        "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>,
        Bjorn Andersson <andersson@...nel.org>,
        Mathieu
 Poirier <mathieu.poirier@...aro.org>,
        Simon Horman <horms@...nel.org>, Jonathan Corbet <corbet@....net>,
        Nishanth Menon <nm@...com>, Vignesh
 Raghavendra <vigneshr@...com>,
        Mengyuan Lou <mengyuanlou@...-swift.com>,
        MD
 Danish Anwar <danishanwar@...com>, Xin Guo <guoxin09@...wei.com>,
        Lei Wei
	<quic_leiwei@...cinc.com>, Lee Trager <lee@...ger.us>,
        Michael Ellerman
	<mpe@...erman.id.au>, Fan Gong <gongfan1@...wei.com>,
        Lorenzo Bianconi
	<lorenzo@...nel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Lukas
 Bulwahn <lukas.bulwahn@...hat.com>,
        Parthiban Veerasooran
	<Parthiban.Veerasooran@...rochip.com>,
        Suman Anna <s-anna@...com>
CC: Tero Kristo <kristo@...nel.org>, <netdev@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-remoteproc@...r.kernel.org>, <linux-doc@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <srk@...com>,
        Roger Quadros
	<rogerq@...nel.org>
Subject: [PATCH net-next v2 1/8] dt-bindings: net: ti,rpmsg-eth: Add DT binding for RPMSG ETH

Add device tree binding documentation for Texas Instruments RPMsg Ethernet
channels. This binding describes the shared memory communication interface
between host processor and a remote processor for Ethernet packet exchange.

The binding defines the required 'memory-region' property that references
the dedicated shared memory area used for exchanging Ethernet packets
between processors.

Signed-off-by: MD Danish Anwar <danishanwar@...com>
---
 .../devicetree/bindings/net/ti,rpmsg-eth.yaml | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/ti,rpmsg-eth.yaml

diff --git a/Documentation/devicetree/bindings/net/ti,rpmsg-eth.yaml b/Documentation/devicetree/bindings/net/ti,rpmsg-eth.yaml
new file mode 100644
index 000000000000..1c86d5c020b0
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/ti,rpmsg-eth.yaml
@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/ti,rpmsg-eth.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments RPMsg channel nodes for Ethernet communication
+
+description: |
+  RPMsg Ethernet subnode represents the communication interface between host
+  processor and a remote processor.
+
+maintainers:
+  - MD Danish Anwar <danishanwar@...com>
+
+properties:
+  memory-region:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: |
+      Phandle to the shared memory region used for communication between the
+      host processor and the remote processor.
+      This shared memory region is used to exchange Ethernet packets.
+
+required:
+  - memory-region
+
+additionalProperties: false
+
+examples:
+  - |
+    main_r5fss0_core0 {
+        mboxes = <&mailbox0_cluster2 &mbox_main_r5fss0_core0>;
+        memory-region = <&main_r5fss0_core0_dma_memory_region>,
+                        <&main_r5fss0_core0_memory_region>;
+        rpmsg-eth {
+            memory-region = <&main_r5fss0_core0_memory_region_shm>;
+        };
+    };
-- 
2.34.1