dt-bindings: net: airoha: Add EN7581 ethernet controller

Introduce device-tree binding documentation for Airoha EN7581 ethernet
mac controller.
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/7dfecf8aa4e6519562a94455b95c49e1b3c858a0.1720818878.git.lorenzo@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/devicetree/bindings/net/airoha,en7581-eth.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/airoha,en7581-eth.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Airoha EN7581 Frame Engine Ethernet controller
+
+maintainers:
+  - Lorenzo Bianconi <lorenzo@kernel.org>
+
+description:
+  The frame engine ethernet controller can be found on Airoha SoCs.
+  These SoCs have multi-GMAC ports.
+
+properties:
+  compatible:
+    enum:
+      - airoha,en7581-eth
+
+  reg:
+    items:
+      - description: Frame engine base address
+      - description: QDMA0 base address
+      - description: QDMA1 base address
+
+  reg-names:
+    items:
+      - const: fe
+      - const: qdma0
+      - const: qdma1
+
+  interrupts:
+    items:
+      - description: QDMA lan irq0
+      - description: QDMA lan irq1
+      - description: QDMA lan irq2
+      - description: QDMA lan irq3
+      - description: QDMA wan irq0
+      - description: QDMA wan irq1
+      - description: QDMA wan irq2
+      - description: QDMA wan irq3
+      - description: FE error irq
+      - description: PDMA irq
+
+  resets:
+    maxItems: 8
+
+  reset-names:
+    items:
+      - const: fe
+      - const: pdma
+      - const: qdma
+      - const: xsi-mac
+      - const: hsi0-mac
+      - const: hsi1-mac
+      - const: hsi-mac
+      - const: xfp-mac
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  "^ethernet@[1-4]$":
+    type: object
+    unevaluatedProperties: false
+    $ref: ethernet-controller.yaml#
+    description:
+      Ethernet GMAC port associated to the MAC controller
+    properties:
+      compatible:
+        const: airoha,eth-mac
+
+      reg:
+        minimum: 1
+        maximum: 4
+        description: GMAC port identifier
+
+    required:
+      - reg
+      - compatible
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - resets
+  - reset-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/clock/en7523-clk.h>
+
+    soc {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      eth: ethernet@1fb50000 {
+        compatible = "airoha,en7581-eth";
+        reg = <0 0x1fb50000 0 0x2600>,
+              <0 0x1fb54000 0 0x2000>,
+              <0 0x1fb56000 0 0x2000>;
+        reg-names = "fe", "qdma0", "qdma1";
+
+        resets = <&scuclk 44>,
+                 <&scuclk 30>,
+                 <&scuclk 31>,
+                 <&scuclk 6>,
+                 <&scuclk 15>,
+                 <&scuclk 16>,
+                 <&scuclk 17>,
+                 <&scuclk 26>;
+        reset-names = "fe", "pdma", "qdma", "xsi-mac",
+                      "hsi0-mac", "hsi1-mac", "hsi-mac",
+                      "xfp-mac";
+
+        interrupts = <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 56 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 58 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 59 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>;
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        mac: ethernet@1 {
+          compatible = "airoha,eth-mac";
+          reg = <1>;
+        };
+      };
+    };