dt-bindings: dsa: Rewrite Vitesse VSC73xx in schema

This rewrites the Vitesse VSC73xx DSA switches DT binding in
schema.

It was a bit tricky since I needed to come up with some way
of applying the SPI properties only on SPI devices and not
platform devices, but I figured something out that works.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 162 insertions, 129 deletions

diff --git a/Documentation/devicetree/bindings/net/dsa/vitesse,vsc73xx.txt b/Documentation/devicetree/bindings/net/dsa/vitesse,vsc73xx.txt
deleted file mode 100644
index 258bef483673..000000000000
--- a/Documentation/devicetree/bindings/net/dsa/vitesse,vsc73xx.txt
+++ /dev/null
@@ -1,129 +0,0 @@
-Vitesse VSC73xx Switches
-========================
-
-This defines device tree bindings for the Vitesse VSC73xx switch chips.
-The Vitesse company has been acquired by Microsemi and Microsemi has
-been acquired Microchip but retains this vendor branding.
-
-The currently supported switch chips are:
-Vitesse VSC7385 SparX-G5 5+1-port Integrated Gigabit Ethernet Switch
-Vitesse VSC7388 SparX-G8 8-port Integrated Gigabit Ethernet Switch
-Vitesse VSC7395 SparX-G5e 5+1-port Integrated Gigabit Ethernet Switch
-Vitesse VSC7398 SparX-G8e 8-port Integrated Gigabit Ethernet Switch
-
-This switch could have two different management interface.
-
-If SPI interface is used, the device tree node is an SPI device so it must
-reside inside a SPI bus device tree node, see spi/spi-bus.txt
-
-When the chip is connected to a parallel memory bus and work in memory-mapped
-I/O mode, a platform device is used to represent the vsc73xx. In this case it
-must reside inside a platform bus device tree node.
-
-Required properties:
-
-- compatible: must be exactly one of:
-	"vitesse,vsc7385"
-	"vitesse,vsc7388"
-	"vitesse,vsc7395"
-	"vitesse,vsc7398"
-- gpio-controller: indicates that this switch is also a GPIO controller,
-  see gpio/gpio.txt
-- #gpio-cells: this must be set to <2> and indicates that we are a twocell
-  GPIO controller, see gpio/gpio.txt
-
-Optional properties:
-
-- reset-gpios: a handle to a GPIO line that can issue reset of the chip.
-  It should be tagged as active low.
-
-Required subnodes:
-
-See net/dsa/dsa.txt for a list of additional required and optional properties
-and subnodes of DSA switches.
-
-Examples:
-
-SPI:
-switch@0 {
-	compatible = "vitesse,vsc7395";
-	reg = <0>;
-	/* Specified for 2.5 MHz or below */
-	spi-max-frequency = <2500000>;
-	gpio-controller;
-	#gpio-cells = <2>;
-
-	ports {
-		#address-cells = <1>;
-		#size-cells = <0>;
-
-		port@0 {
-			reg = <0>;
-			label = "lan1";
-		};
-		port@1 {
-			reg = <1>;
-			label = "lan2";
-		};
-		port@2 {
-			reg = <2>;
-			label = "lan3";
-		};
-		port@3 {
-			reg = <3>;
-			label = "lan4";
-		};
-		vsc: port@6 {
-			reg = <6>;
-			ethernet = <&gmac1>;
-			phy-mode = "rgmii";
-			fixed-link {
-				speed = <1000>;
-				full-duplex;
-				pause;
-			};
-		};
-	};
-};
-
-Platform:
-switch@2,0 {
-	#address-cells = <1>;
-	#size-cells = <1>;
-	compatible = "vitesse,vsc7385";
-	reg = <0x2 0x0 0x20000>;
-	reset-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
-
-	ports {
-		#address-cells = <1>;
-		#size-cells = <0>;
-
-		port@0 {
-			reg = <0>;
-			label = "lan1";
-		};
-		port@1 {
-			reg = <1>;
-			label = "lan2";
-		};
-		port@2 {
-			reg = <2>;
-			label = "lan3";
-		};
-		port@3 {
-			reg = <3>;
-			label = "lan4";
-		};
-		vsc: port@6 {
-			reg = <6>;
-			ethernet = <&enet0>;
-			phy-mode = "rgmii";
-			fixed-link {
-				speed = <1000>;
-				full-duplex;
-				pause;
-			};
-		};
-	};
-
-};
diff --git a/Documentation/devicetree/bindings/net/dsa/vitesse,vsc73xx.yaml b/Documentation/devicetree/bindings/net/dsa/vitesse,vsc73xx.yaml
new file mode 100644
index 000000000000..b99d7a694b70
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/dsa/vitesse,vsc73xx.yaml
@@ -0,0 +1,162 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/dsa/vitesse,vsc73xx.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Vitesse VSC73xx DSA Switches
+
+maintainers:
+  - Linus Walleij <linus.walleij@linaro.org>
+
+description:
+  The Vitesse DSA Switches were produced in the early-to-mid 2000s.
+
+  The Vitesse company has been acquired by Microsemi and Microsemi has
+  been acquired Microchip but the new owner retains this vendor branding.
+
+  The currently supported switch chips are
+  Vitesse VSC7385 SparX-G5 5+1-port Integrated Gigabit Ethernet Switch
+  Vitesse VSC7388 SparX-G8 8-port Integrated Gigabit Ethernet Switch
+  Vitesse VSC7395 SparX-G5e 5+1-port Integrated Gigabit Ethernet Switch
+  Vitesse VSC7398 SparX-G8e 8-port Integrated Gigabit Ethernet Switch
+
+  This switch can use one of two different management interfaces.
+
+  If SPI interface is used, the device tree node is an SPI device so it must
+  reside inside a SPI bus device tree node, see spi/spi-bus.txt
+
+  When the chip is connected to a parallel memory bus and work in memory-mapped
+  I/O mode, a platform device is used to represent the vsc73xx. In this case it
+  must reside inside a platform bus device tree node.
+
+properties:
+  compatible:
+    enum:
+      - vitesse,vsc7385
+      - vitesse,vsc7388
+      - vitesse,vsc7395
+      - vitesse,vsc7398
+
+  reg:
+    maxItems: 1
+
+  gpio-controller: true
+  "#gpio-cells":
+    const: 2
+
+  reset-gpios:
+    description: GPIO to be used to reset the whole device
+    maxItems: 1
+
+allOf:
+  - $ref: dsa.yaml#/$defs/ethernet-ports
+
+# This checks if reg is a chipselect so the device is on an SPI
+# bus, the if-clause will fail if reg is a tuple such as for a
+# platform device.
+if:
+  properties:
+    reg:
+      minimum: 0
+      maximum: 256
+then:
+  $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    spi {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      ethernet-switch@0 {
+        compatible = "vitesse,vsc7395";
+        reg = <0>;
+        spi-max-frequency = <2500000>;
+        gpio-controller;
+        #gpio-cells = <2>;
+
+        ethernet-ports {
+          #address-cells = <1>;
+          #size-cells = <0>;
+
+          ethernet-port@0 {
+            reg = <0>;
+            label = "lan1";
+          };
+          ethernet-port@1 {
+            reg = <1>;
+            label = "lan2";
+          };
+          ethernet-port@2 {
+            reg = <2>;
+            label = "lan3";
+          };
+          ethernet-port@3 {
+            reg = <3>;
+            label = "lan4";
+          };
+          ethernet-port@6 {
+            reg = <6>;
+            ethernet = <&gmac1>;
+            phy-mode = "rgmii";
+            fixed-link {
+              speed = <1000>;
+              full-duplex;
+              pause;
+            };
+          };
+        };
+      };
+    };
+
+    bus {
+      #address-cells = <1>;
+      #size-cells = <1>;
+
+      ethernet-switch@10000000 {
+        compatible = "vitesse,vsc7385";
+        reg = <0x10000000 0x20000>;
+        reset-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
+
+        ethernet-ports {
+          #address-cells = <1>;
+          #size-cells = <0>;
+
+          ethernet-port@0 {
+            reg = <0>;
+            label = "lan1";
+          };
+          ethernet-port@1 {
+            reg = <1>;
+            label = "lan2";
+          };
+          ethernet-port@2 {
+            reg = <2>;
+            label = "lan3";
+          };
+          ethernet-port@3 {
+            reg = <3>;
+            label = "lan4";
+          };
+          ethernet-port@6 {
+            reg = <6>;
+            ethernet = <&enet0>;
+            phy-mode = "rgmii";
+            fixed-link {
+              speed = <1000>;
+              full-duplex;
+              pause;
+            };
+          };
+        };
+      };
+    };