netdev - [PATCH 1/3 net-next v4] net: ethernet: ixp4xx: Add DT bindings

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Date:   Sun, 25 Apr 2021 02:30:36 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     netdev@...r.kernel.org, "David S . Miller" <davem@...emloft.net>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Linus Walleij <linus.walleij@...aro.org>,
        Zoltan HERPAI <wigyori@...0.hu>,
        Raylynn Knight <rayknight@...com>, devicetree@...r.kernel.org
Subject: [PATCH 1/3 net-next v4] net: ethernet: ixp4xx: Add DT bindings

This adds device tree bindings for the IXP4xx ethernet
controller with optional MDIO bridge.

Cc: Zoltan HERPAI <wigyori@...0.hu>
Cc: Raylynn Knight <rayknight@...com>
Cc: devicetree@...r.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
---
ChangeLog v3->v4:
- Use a phandle to reference the NPE
- Make a more verbose example with two ethernet devices
  sharing a MDIO bus on just one of them
- Spelling fix
ChangeLog v2->v3:
- Designate phy nodes with ethernet-phy@
- Include phy-mode in the schema
ChangeLog v1->v2:
- Add schema for the (optional) embedded MDIO bus inside
  the ethernet controller in an "mdio" node instead of just
  letting the code randomly populate and present it to
  the operating system.
- Reference the standard schemas for ethernet controller and
  MDIO buses.
- Add intel,npe to indentify the NPE unit used with each
  ethernet adapter.
---
 .../bindings/net/intel,ixp4xx-ethernet.yaml   | 102 ++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/intel,ixp4xx-ethernet.yaml

diff --git a/Documentation/devicetree/bindings/net/intel,ixp4xx-ethernet.yaml b/Documentation/devicetree/bindings/net/intel,ixp4xx-ethernet.yaml
new file mode 100644
index 000000000000..f2e91d1bf7d7
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/intel,ixp4xx-ethernet.yaml
@@ -0,0 +1,102 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2018 Linaro Ltd.
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/net/intel,ixp4xx-ethernet.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Intel IXP4xx ethernet
+
+allOf:
+  - $ref: "ethernet-controller.yaml#"
+
+maintainers:
+  - Linus Walleij <linus.walleij@...aro.org>
+
+description: |
+  The Intel IXP4xx ethernet makes use of the IXP4xx NPE (Network
+  Processing Engine) and the IXP4xx Queue Manager to process
+  the ethernet frames. It can optionally contain an MDIO bus to
+  talk to PHYs.
+
+properties:
+  compatible:
+    const: intel,ixp4xx-ethernet
+
+  reg:
+    maxItems: 1
+    description: Ethernet MMIO address range
+
+  queue-rx:
+    $ref: '/schemas/types.yaml#/definitions/phandle-array'
+    maxItems: 1
+    description: phandle to the RX queue on the NPE
+
+  queue-txready:
+    $ref: '/schemas/types.yaml#/definitions/phandle-array'
+    maxItems: 1
+    description: phandle to the TX READY queue on the NPE
+
+  phy-mode: true
+
+  phy-handle: true
+
+  intel,npe-handle:
+    $ref: '/schemas/types.yaml#/definitions/phandle-array'
+    maxItems: 1
+    description: phandle to the NPE this ethernet instance is using
+      and the instance to use in the second cell
+
+  mdio:
+    type: object
+    $ref: "mdio.yaml#"
+    description: optional node for embedded MDIO controller
+
+required:
+  - compatible
+  - reg
+  - queue-rx
+  - queue-txready
+  - intel,npe-handle
+
+additionalProperties: false
+
+examples:
+  - |
+    npe: npe@...06000 {
+      compatible = "intel,ixp4xx-network-processing-engine";
+      reg = <0xc8006000 0x1000>, <0xc8007000 0x1000>, <0xc8008000 0x1000>;
+    };
+
+    ethernet@...09000 {
+      compatible = "intel,ixp4xx-ethernet";
+      reg = <0xc8009000 0x1000>;
+      status = "disabled";
+      queue-rx = <&qmgr 4>;
+      queue-txready = <&qmgr 21>;
+      intel,npe-handle = <&npe 1>;
+      phy-mode = "rgmii";
+      phy-handle = <&phy1>;
+    };
+
+    ethernet@...0c000 {
+      compatible = "intel,ixp4xx-ethernet";
+      reg = <0xc800c000 0x1000>;
+      status = "disabled";
+      queue-rx = <&qmgr 3>;
+      queue-txready = <&qmgr 20>;
+      intel,npe-handle = <&npe 2>;
+      phy-mode = "rgmii";
+      phy-handle = <&phy2>;
+
+      mdio {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        phy1: ethernet-phy@1 {
+          reg = <1>;
+        };
+        phy2: ethernet-phy@2 {
+          reg = <2>;
+        };
+      };
+    };
-- 
2.29.2