ravb: Document binding for r8a7795 SoC

This patch updates the ravb binding to support the r8a7795 SoC by:
- Adding a compat string for the new hardware
- Adding 25 named interrupts to binding for the new SoC;
  older SoCs continue to use a single multiplexed interrupt

The example is also updated to reflect the r8a7795 as this is the
more complex case.

Based on work by Kazuya Mizuguchi and others.
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>
Acked-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/renesas,ravb.txt

@@ -6,8 +6,12 @@ interface contains.
 Required properties:
 - compatible: "renesas,etheravb-r8a7790" if the device is a part of R8A7790 SoC.
 	      "renesas,etheravb-r8a7794" if the device is a part of R8A7794 SoC.
+	      "renesas,etheravb-r8a7795" if the device is a part of R8A7795 SoC.
 - reg: offset and length of (1) the register block and (2) the stream buffer.
-- interrupts: interrupt specifier for the sole interrupt.
+- interrupts: A list of interrupt-specifiers, one for each entry in
+	      interrupt-names.
+	      If interrupt-names is not present, an interrupt specifier
+	      for a single muxed interrupt.
 - phy-mode: see ethernet.txt file in the same directory.
 - phy-handle: see ethernet.txt file in the same directory.
 - #address-cells: number of address cells for the MDIO bus, must be equal to 1.
@@ -18,6 +22,12 @@ Required properties:
 Optional properties:
 - interrupt-parent: the phandle for the interrupt controller that services
 		    interrupts for this device.
+- interrupt-names: A list of interrupt names.
+		   For the R8A7795 SoC this property is mandatory;
+		   it should include one entry per channel, named "ch%u",
+		   where %u is the channel number ranging from 0 to 24.
+		   For other SoCs this property is optional; if present
+		   it should contain "mux" for a single muxed interrupt.
 - pinctrl-names: pin configuration state name ("default").
 - renesas,no-ether-link: boolean, specify when a board does not provide a proper
 			 AVB_LINK signal.
@@ -27,13 +37,46 @@ Optional properties:
 Example:
 
 	ethernet@e6800000 {
-		compatible = "renesas,etheravb-r8a7790";
-		reg = <0 0xe6800000 0 0x800>, <0 0xee0e8000 0 0x4000>;
+		compatible = "renesas,etheravb-r8a7795";
+		reg = <0 0xe6800000 0 0x800>, <0 0xe6a00000 0 0x10000>;
 		interrupt-parent = <&gic>;
-		interrupts = <0 163 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&mstp8_clks R8A7790_CLK_ETHERAVB>;
-		phy-mode = "rmii";
+		interrupts = <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 43 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 46 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 47 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 51 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 52 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 53 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 54 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 56 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 58 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 59 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 61 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 63 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "ch0", "ch1", "ch2", "ch3",
+				  "ch4", "ch5", "ch6", "ch7",
+				  "ch8", "ch9", "ch10", "ch11",
+				  "ch12", "ch13", "ch14", "ch15",
+				  "ch16", "ch17", "ch18", "ch19",
+				  "ch20", "ch21", "ch22", "ch23",
+				  "ch24";
+		clocks = <&mstp8_clks R8A7795_CLK_ETHERAVB>;
+		power-domains = <&cpg_clocks>;
+		phy-mode = "rgmii-id";
 		phy-handle = <&phy0>;
+
 		pinctrl-0 = <&ether_pins>;
 		pinctrl-names = "default";
 		renesas,no-ether-link;
@@ -41,8 +84,20 @@ Example:
 		#size-cells = <0>;
 
 		phy0: ethernet-phy@0 {
+			rxc-skew-ps = <900>;
+			rxdv-skew-ps = <0>;
+			rxd0-skew-ps = <0>;
+			rxd1-skew-ps = <0>;
+			rxd2-skew-ps = <0>;
+			rxd3-skew-ps = <0>;
+			txc-skew-ps = <900>;
+			txen-skew-ps = <0>;
+			txd0-skew-ps = <0>;
+			txd1-skew-ps = <0>;
+			txd2-skew-ps = <0>;
+			txd3-skew-ps = <0>;
 			reg = <0>;
 			interrupt-parent = <&gpio2>;
-			interrupts = <15 IRQ_TYPE_LEVEL_LOW>;
+			interrupts = <11 IRQ_TYPE_LEVEL_LOW>;
 		};
 	};