netdev - [RFC net-next 13/15] dt-bindings: net: cpc: add silabs,cpc-spi.yaml

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Message-ID: <20250512012748.79749-14-damien.riegel@silabs.com>
Date: Sun, 11 May 2025 21:27:46 -0400
From: Damien Riégel <damien.riegel@...abs.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>,
        Silicon Labs Kernel Team <linux-devel@...abs.com>,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [RFC net-next 13/15] dt-bindings: net: cpc: add silabs,cpc-spi.yaml

Document device tree bindings for Silicon Labs CPC over a SPI bus. This
device requires both a chip select and an interrupt line to be able to
work.

Signed-off-by: Damien Riégel <damien.riegel@...abs.com>
---
 .../bindings/net/silabs,cpc-spi.yaml          | 54 +++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/silabs,cpc-spi.yaml

diff --git a/Documentation/devicetree/bindings/net/silabs,cpc-spi.yaml b/Documentation/devicetree/bindings/net/silabs,cpc-spi.yaml
new file mode 100644
index 00000000000..82d3cd47daa
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/silabs,cpc-spi.yaml
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright 2024 Silicon Labs Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/silabs,cpc-spi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SPI driver for CPC
+
+maintainers:
+  - Damien Riégel <damien.riegel@...abs.com>
+
+description: |
+  This binding is for the implementation of CPC protocol over SPI. The protocol
+  consists of a chain of header+payload frames. The interrupt is used by the
+  device to signal it has a frame to transmit, but also between headers and
+  payloads to signal that it is ready to receive payload.
+
+properties:
+  compatible:
+    enum:
+      - silabs,cpc-spi
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupt
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    spi {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            cpcspi@0 {
+                  compatible = "silabs,cpc-spi";
+                  reg = <0>;
+                  spi-max-frequency = <1000000>;
+                  interrupt-parent = <&gpio>;
+                  interrupts = <23 IRQ_TYPE_EDGE_FALLING>;
+            };
+    };
-- 
2.49.0