[PATCH v8 net-next 01/10] dt-bindings: net: dsa: dt bindings for microchip lan937x

[Prasanna Vengateshan <prasanna.vengateshan@microchip.com>]

Documentation in .yaml format and updates to the MAINTAINERS
Also 'make dt_binding_check' is passed.

RGMII internal delay values for the mac is retrieved from
rx-internal-delay-ps & tx-internal-delay-ps as per the feedback from
v3 patch series.
https://lore.kernel.org/netdev/20210802121550.gqgbipqdvp5x76ii@skbuf/

It supports only the delay value of 0ns and 2ns.

Signed-off-by: Prasanna Vengateshan <prasanna.vengateshan@microchip.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 .../bindings/net/dsa/microchip,lan937x.yaml   | 179 ++++++++++++++++++
 MAINTAINERS                                   |   1 +
 2 files changed, 180 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/dsa/microchip,lan937x.yaml

diff --git a/Documentation/devicetree/bindings/net/dsa/microchip,lan937x.yaml b/Documentation/devicetree/bindings/net/dsa/microchip,lan937x.yaml
new file mode 100644
index 000000000000..5657a0b89e4e
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/dsa/microchip,lan937x.yaml
@@ -0,0 +1,179 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/dsa/microchip,lan937x.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: LAN937x Ethernet Switch Series Tree Bindings
+
+maintainers:
+  - UNGLinuxDriver@microchip.com
+
+allOf:
+  - $ref: dsa.yaml#
+
+properties:
+  compatible:
+    enum:
+      - microchip,lan9370
+      - microchip,lan9371
+      - microchip,lan9372
+      - microchip,lan9373
+      - microchip,lan9374
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency:
+    maximum: 50000000
+
+  reset-gpios:
+    description: Optional gpio specifier for a reset line
+    maxItems: 1
+
+  mdio:
+    $ref: /schemas/net/mdio.yaml#
+    unevaluatedProperties: false
+
+patternProperties:
+  "^(ethernet-)?ports$":
+    patternProperties:
+      "^(ethernet-)?port@[0-7]+$":
+        allOf:
+          - if:
+              properties:
+                phy-mode:
+                  contains:
+                    enum:
+                      - rgmii
+                      - rgmii-rxid
+                      - rgmii-txid
+                      - rgmii-id
+            then:
+              properties:
+                rx-internal-delay-ps:
+                  $ref: "#/$defs/internal-delay-ps"
+                tx-internal-delay-ps:
+                  $ref: "#/$defs/internal-delay-ps"
+
+required:
+  - compatible
+  - reg
+
+$defs:
+  internal-delay-ps:
+    description: Delay is in pico seconds
+    enum: [0, 2000]
+    default: 0
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    //Ethernet switch connected via spi to the host
+    ethernet {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      fixed-link {
+        speed = <1000>;
+        full-duplex;
+      };
+    };
+
+    spi {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      lan9374: switch@0 {
+        compatible = "microchip,lan9374";
+        reg = <0>;
+
+        spi-max-frequency = <44000000>;
+
+        ethernet-ports {
+          #address-cells = <1>;
+          #size-cells = <0>;
+          port@0 {
+            reg = <0>;
+            label = "lan1";
+            phy-mode = "internal";
+            phy-handle = <&t1phy0>;
+          };
+          port@1 {
+            reg = <1>;
+            label = "lan2";
+            phy-mode = "internal";
+            phy-handle = <&t1phy1>;
+          };
+          port@2 {
+            reg = <2>;
+            label = "lan4";
+            phy-mode = "internal";
+            phy-handle = <&t1phy2>;
+          };
+          port@3 {
+            reg = <3>;
+            label = "lan6";
+            phy-mode = "internal";
+            phy-handle = <&t1phy3>;
+          };
+          port@4 {
+            reg = <4>;
+            phy-mode = "rgmii";
+            ethernet = <&ethernet>;
+            fixed-link {
+              speed = <1000>;
+              full-duplex;
+            };
+          };
+          port@5 {
+            reg = <5>;
+            label = "lan7";
+            phy-mode = "rgmii";
+            fixed-link {
+              speed = <1000>;
+              full-duplex;
+            };
+          };
+          port@6 {
+            reg = <6>;
+            label = "lan5";
+            phy-mode = "internal";
+            phy-handle = <&t1phy4>;
+          };
+          port@7 {
+            reg = <7>;
+            label = "lan3";
+            phy-mode = "internal";
+            phy-handle = <&t1phy5>;
+          };
+        };
+
+        mdio {
+          #address-cells = <1>;
+          #size-cells = <0>;
+
+          t1phy0: ethernet-phy@0{
+            reg = <0x0>;
+          };
+          t1phy1: ethernet-phy@1{
+            reg = <0x1>;
+          };
+          t1phy2: ethernet-phy@2{
+            reg = <0x2>;
+          };
+          t1phy3: ethernet-phy@3{
+            reg = <0x3>;
+          };
+          t1phy4: ethernet-phy@6{
+            reg = <0x6>;
+          };
+          t1phy5: ethernet-phy@7{
+            reg = <0x7>;
+          };
+        };
+      };
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index c7169da15ab4..4449cc2e9c69 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -12630,6 +12630,7 @@ M:	UNGLinuxDriver@microchip.com
 L:	netdev@vger.kernel.org
 S:	Maintained
 F:	Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
+F:	Documentation/devicetree/bindings/net/dsa/microchip,lan937x.yaml
 F:	drivers/net/dsa/microchip/*
 F:	include/linux/platform_data/microchip-ksz.h
 F:	net/dsa/tag_ksz.c
-- 
2.30.2