dt-bindings: net: dsa: realtek: convert to YAML schema, add MDIO

Schema changes:

- support for mdio-connected switches (mdio driver), recognized by
  checking the presence of property "reg"
- new compatible strings for rtl8367s and rtl8367rb
- "interrupt-controller" was not added as a required property. It might
  still work polling the ports when missing.

Examples changes:

- renamed "switch_intc" to make it unique between examples
- removed "dsa-mdio" from mdio compatible property
- renamed phy@0 to ethernet-phy@0 (not tested with real HW)
  phy@ requires #phy-cells
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/dsa/realtek-smi.txt

-Realtek SMI-based Switches
-==========================
-
-The SMI "Simple Management Interface" is a two-wire protocol using
-bit-banged GPIO that while it reuses the MDIO lines MCK and MDIO does
-not use the MDIO protocol. This binding defines how to specify the
-SMI-based Realtek devices.
-
-Required properties:
-
-- compatible: must be exactly one of:
-      "realtek,rtl8365mb" (4+1 ports)
-      "realtek,rtl8366"
-      "realtek,rtl8366rb" (4+1 ports)
-      "realtek,rtl8366s"  (4+1 ports)
-      "realtek,rtl8367"
-      "realtek,rtl8367b"
-      "realtek,rtl8368s"  (8 port)
-      "realtek,rtl8369"
-      "realtek,rtl8370"   (8 port)
-
-Required properties:
-- mdc-gpios: GPIO line for the MDC clock line.
-- mdio-gpios: GPIO line for the MDIO data line.
-- reset-gpios: GPIO line for the reset signal.
-
-Optional properties:
-- realtek,disable-leds: if the LED drivers are not used in the
-  hardware design this will disable them so they are not turned on
-  and wasting power.
-
-Required subnodes:
-
-- interrupt-controller
-
-  This defines an interrupt controller with an IRQ line (typically
-  a GPIO) that will demultiplex and handle the interrupt from the single
-  interrupt line coming out of one of the SMI-based chips. It most
-  importantly provides link up/down interrupts to the PHY blocks inside
-  the ASIC.
-
-Required properties of interrupt-controller:
-
-- interrupt: parent interrupt, see interrupt-controller/interrupts.txt
-- interrupt-controller: see interrupt-controller/interrupts.txt
-- #address-cells: should be <0>
-- #interrupt-cells: should be <1>
-
-- mdio
-
-  This defines the internal MDIO bus of the SMI device, mostly for the
-  purpose of being able to hook the interrupts to the right PHY and
-  the right PHY to the corresponding port.
-
-Required properties of mdio:
-
-- compatible: should be set to "realtek,smi-mdio" for all SMI devices
-
-See net/mdio.txt for additional MDIO bus properties.
-
-See net/dsa/dsa.txt for a list of additional required and optional properties
-and subnodes of DSA switches.
-
-Examples:
-
-An example for the RTL8366RB:
-
-switch {
-	compatible = "realtek,rtl8366rb";
-	/* 22 = MDIO (has input reads), 21 = MDC (clock, output only) */
-	mdc-gpios = <&gpio0 21 GPIO_ACTIVE_HIGH>;
-	mdio-gpios = <&gpio0 22 GPIO_ACTIVE_HIGH>;
-	reset-gpios = <&gpio0 14 GPIO_ACTIVE_LOW>;
-
-	switch_intc: interrupt-controller {
-		/* GPIO 15 provides the interrupt */
-		interrupt-parent = <&gpio0>;
-		interrupts = <15 IRQ_TYPE_LEVEL_LOW>;
-		interrupt-controller;
-		#address-cells = <0>;
-		#interrupt-cells = <1>;
-	};
-
-	ports {
-		#address-cells = <1>;
-		#size-cells = <0>;
-		reg = <0>;
-		port@0 {
-			reg = <0>;
-			label = "lan0";
-			phy-handle = <&phy0>;
-		};
-		port@1 {
-			reg = <1>;
-			label = "lan1";
-			phy-handle = <&phy1>;
-		};
-		port@2 {
-			reg = <2>;
-			label = "lan2";
-			phy-handle = <&phy2>;
-		};
-		port@3 {
-			reg = <3>;
-			label = "lan3";
-			phy-handle = <&phy3>;
-		};
-		port@4 {
-			reg = <4>;
-			label = "wan";
-			phy-handle = <&phy4>;
-		};
-		port@5 {
-			reg = <5>;
-			label = "cpu";
-			ethernet = <&gmac0>;
-			phy-mode = "rgmii";
-			fixed-link {
-				speed = <1000>;
-				full-duplex;
-			};
-		};
-	};
-
-	mdio {
-		compatible = "realtek,smi-mdio", "dsa-mdio";
-		#address-cells = <1>;
-		#size-cells = <0>;
-
-		phy0: phy@0 {
-			reg = <0>;
-			interrupt-parent = <&switch_intc>;
-			interrupts = <0>;
-		};
-		phy1: phy@1 {
-			reg = <1>;
-			interrupt-parent = <&switch_intc>;
-			interrupts = <1>;
-		};
-		phy2: phy@2 {
-			reg = <2>;
-			interrupt-parent = <&switch_intc>;
-			interrupts = <2>;
-		};
-		phy3: phy@3 {
-			reg = <3>;
-			interrupt-parent = <&switch_intc>;
-			interrupts = <3>;
-		};
-		phy4: phy@4 {
-			reg = <4>;
-			interrupt-parent = <&switch_intc>;
-			interrupts = <12>;
-		};
-	};
-};
-
-An example for the RTL8365MB-VC:
-
-switch {
-	compatible = "realtek,rtl8365mb";
-	mdc-gpios = <&gpio1 16 GPIO_ACTIVE_HIGH>;
-	mdio-gpios = <&gpio1 17 GPIO_ACTIVE_HIGH>;
-	reset-gpios = <&gpio5 0 GPIO_ACTIVE_LOW>;
-
-	switch_intc: interrupt-controller {
-		interrupt-parent = <&gpio5>;
-		interrupts = <1 IRQ_TYPE_LEVEL_LOW>;
-		interrupt-controller;
-		#address-cells = <0>;
-		#interrupt-cells = <1>;
-	};
-
-	ports {
-		#address-cells = <1>;
-		#size-cells = <0>;
-		reg = <0>;
-		port@0 {
-			reg = <0>;
-			label = "swp0";
-			phy-handle = <&ethphy0>;
-		};
-		port@1 {
-			reg = <1>;
-			label = "swp1";
-			phy-handle = <&ethphy1>;
-		};
-		port@2 {
-			reg = <2>;
-			label = "swp2";
-			phy-handle = <&ethphy2>;
-		};
-		port@3 {
-			reg = <3>;
-			label = "swp3";
-			phy-handle = <&ethphy3>;
-		};
-		port@6 {
-			reg = <6>;
-			label = "cpu";
-			ethernet = <&fec1>;
-			phy-mode = "rgmii";
-			tx-internal-delay-ps = <2000>;
-			rx-internal-delay-ps = <2000>;
-
-			fixed-link {
-				speed = <1000>;
-				full-duplex;
-				pause;
-			};
-		};
-	};
-
-	mdio {
-		compatible = "realtek,smi-mdio";
-		#address-cells = <1>;
-		#size-cells = <0>;
-
-		ethphy0: phy@0 {
-			reg = <0>;
-			interrupt-parent = <&switch_intc>;
-			interrupts = <0>;
-		};
-		ethphy1: phy@1 {
-			reg = <1>;
-			interrupt-parent = <&switch_intc>;
-			interrupts = <1>;
-		};
-		ethphy2: phy@2 {
-			reg = <2>;
-			interrupt-parent = <&switch_intc>;
-			interrupts = <2>;
-		};
-		ethphy3: phy@3 {
-			reg = <3>;
-			interrupt-parent = <&switch_intc>;
-			interrupts = <3>;
-		};
-	};
-};