dt-bindings: net: update Marvell PPv2 binding for PPv2.2 support

The Marvell PPv2 Device Tree binding was so far only used to describe
the PPv2.1 network controller, used in the Marvell Armada 375.

A new version of this IP block, PPv2.2 is used in the Marvell Armada
7K/8K processor. This commit extends the existing binding so that it can
also be used to describe PPv2.2 hardware.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/marvell-pp2.txt

-* Marvell Armada 375 Ethernet Controller (PPv2)
+* Marvell Armada 375 Ethernet Controller (PPv2.1)
+  Marvell Armada 7K/8K Ethernet Controller (PPv2.2)
 
 Required properties:
 
-- compatible: should be "marvell,armada-375-pp2"
+- compatible: should be one of:
+    "marvell,armada-375-pp2"
+    "marvell,armada-7k-pp2"
 - reg: addresses and length of the register sets for the device.
-  Must contain the following register sets:
+  For "marvell,armada-375-pp2", must contain the following register
+  sets:
 	- common controller registers
 	- LMS registers
-  In addition, at least one port register set is required.
-- clocks: a pointer to the reference clocks for this device, consequently:
-	- main controller clock
-	- GOP clock
-- clock-names: names of used clocks, must be "pp_clk" and "gop_clk".
+	- one register area per Ethernet port
+  For "marvell,armada-7k-pp2", must contain the following register
+  sets:
+	- packet processor registers
+	- networking interfaces registers
+
+- clocks: pointers to the reference clocks for this device, consequently:
+	- main controller clock (for both armada-375-pp2 and armada-7k-pp2)
+	- GOP clock (for both armada-375-pp2 and armada-7k-pp2)
+	- MG clock (only for armada-7k-pp2)
+- clock-names: names of used clocks, must be "pp_clk", "gop_clk" and
+  "mg_clk" (the latter only for armada-7k-pp2).
 
 The ethernet ports are represented by subnodes. At least one port is
 required.
@@ -19,8 +30,10 @@ required.
 Required properties (port):
 
 - interrupts: interrupt for the port
-- port-id: should be '0' or '1' for ethernet ports, and '2' for the
-           loopback port
+- port-id: ID of the port from the MAC point of view
+- gop-port-id: only for marvell,armada-7k-pp2, ID of the port from the
+  GOP (Group Of Ports) point of view. This ID is used to index the
+  per-port registers in the second register area.
 - phy-mode: See ethernet.txt file in the same directory
 
 Optional properties (port):
@@ -29,7 +42,7 @@ Optional properties (port):
 - phy: a phandle to a phy node defining the PHY address (as the reg
   property, a single integer).
 
-Example:
+Example for marvell,armada-375-pp2:
 
 ethernet@f0000 {
 	compatible = "marvell,armada-375-pp2";
@@ -57,3 +70,30 @@ ethernet@f0000 {
 		phy-mode = "gmii";
 	};
 };
+
+Example for marvell,armada-7k-pp2:
+
+cpm_ethernet: ethernet@0 {
+	compatible = "marvell,armada-7k-pp22";
+	reg = <0x0 0x100000>, <0x129000 0xb000>;
+	clocks = <&cpm_syscon0 1 3>, <&cpm_syscon0 1 9>, <&cpm_syscon0 1 5>;
+	clock-names = "pp_clk", "gop_clk", "gp_clk";
+
+	eth0: eth0 {
+		interrupts = <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>;
+		port-id = <0>;
+		gop-port-id = <0>;
+	};
+
+	eth1: eth1 {
+		interrupts = <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH>;
+		port-id = <1>;
+		gop-port-id = <2>;
+	};
+
+	eth2: eth2 {
+		interrupts = <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>;
+		port-id = <2>;
+		gop-port-id = <3>;
+	};
+};