dt-bindings: net: meson-dwmac: convert to yaml

Now that we have the DT validation in place, let's convert the device tree
bindings for the Synopsys DWMAC Glue for Amlogic SoCs over to a YAML schemas.

Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/amlogic,meson-dwmac.yaml

@@ -0,0 +1,113 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2019 BayLibre, SAS
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/net/amlogic,meson-dwmac.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Amlogic Meson DWMAC Ethernet controller
+
+maintainers:
+  - Neil Armstrong <narmstrong@baylibre.com>
+  - Martin Blumenstingl <martin.blumenstingl@googlemail.com>
+
+# We need a select here so we don't match all nodes with 'snps,dwmac'
+select:
+  properties:
+    compatible:
+      contains:
+        enum:
+          - amlogic,meson6-dwmac
+          - amlogic,meson8b-dwmac
+          - amlogic,meson8m2-dwmac
+          - amlogic,meson-gxbb-dwmac
+          - amlogic,meson-axg-dwmac
+  required:
+    - compatible
+
+allOf:
+  - $ref: "snps,dwmac.yaml#"
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - amlogic,meson8b-dwmac
+              - amlogic,meson8m2-dwmac
+              - amlogic,meson-gxbb-dwmac
+              - amlogic,meson-axg-dwmac
+
+    then:
+      properties:
+        clocks:
+          items:
+            - description: GMAC main clock
+            - description: First parent clock of the internal mux
+            - description: Second parent clock of the internal mux
+
+        clock-names:
+          minItems: 3
+          maxItems: 3
+          items:
+            - const: stmmaceth
+            - const: clkin0
+            - const: clkin1
+
+        amlogic,tx-delay-ns:
+          $ref: /schemas/types.yaml#definitions/uint32
+          description:
+            The internal RGMII TX clock delay (provided by this driver) in
+            nanoseconds. Allowed values are 0ns, 2ns, 4ns, 6ns.
+            When phy-mode is set to "rgmii" then the TX delay should be
+            explicitly configured. When not configured a fallback of 2ns is
+            used. When the phy-mode is set to either "rgmii-id" or "rgmii-txid"
+            the TX clock delay is already provided by the PHY. In that case
+            this property should be set to 0ns (which disables the TX clock
+            delay in the MAC to prevent the clock from going off because both
+            PHY and MAC are adding a delay).
+            Any configuration is ignored when the phy-mode is set to "rmii".
+
+properties:
+  compatible:
+    additionalItems: true
+    maxItems: 3
+    items:
+      - enum:
+          - amlogic,meson6-dwmac
+          - amlogic,meson8b-dwmac
+          - amlogic,meson8m2-dwmac
+          - amlogic,meson-gxbb-dwmac
+          - amlogic,meson-axg-dwmac
+    contains:
+      enum:
+        - snps,dwmac-3.70a
+        - snps,dwmac
+
+  reg:
+    items:
+      - description:
+          The first register range should be the one of the DWMAC controller
+      - description:
+          The second range is is for the Amlogic specific configuration
+          (for example the PRG_ETHERNET register range on Meson8b and newer)
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - interrupt-names
+  - clocks
+  - clock-names
+  - phy-mode
+
+examples:
+  - |
+    ethmac: ethernet@c9410000 {
+         compatible = "amlogic,meson-gxbb-dwmac", "snps,dwmac";
+         reg = <0xc9410000 0x10000>, <0xc8834540 0x8>;
+         interrupts = <8>;
+         interrupt-names = "macirq";
+         clocks = <&clk_eth>, <&clkc_fclk_div2>, <&clk_mpll2>;
+         clock-names = "stmmaceth", "clkin0", "clkin1";
+         phy-mode = "rgmii";
+    };

Documentation/devicetree/bindings/net/snps,dwmac.yaml

@@ -50,6 +50,11 @@ properties:
         - allwinner,sun8i-r40-emac
         - allwinner,sun8i-v3s-emac
         - allwinner,sun50i-a64-emac
+        - amlogic,meson6-dwmac
+        - amlogic,meson8b-dwmac
+        - amlogic,meson8m2-dwmac
+        - amlogic,meson-gxbb-dwmac
+        - amlogic,meson-axg-dwmac
         - snps,dwmac
         - snps,dwmac-3.50a
         - snps,dwmac-3.610