Documentation: devicetree: add Broadcom Starfighter 2 binding

Add the binding documentation for the Broadcom Starfighter 2 integrated
switch hardware.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/Documentation/devicetree/bindings/net/broadcom-sf2.txt b/Documentation/devicetree/bindings/net/broadcom-sf2.txt
new file mode 100644 (file)
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+* Broadcom Starfighter 2 integrated swich
+
+Required properties:
+
+- compatible: should be "brcm,bcm7445-switch-v4.0"
+- reg: addresses and length of the register sets for the device, must be 6
+  pairs of register addresses and lengths
+- interrupts: interrupts for the devices, must be two interrupts
+- dsa,mii-bus: phandle to the MDIO bus controller, see dsa/dsa.txt
+- dsa,ethernet: phandle to the CPU network interface controller, see dsa/dsa.txt
+- #size-cells: must be 0
+- #address-cells: must be 2, see dsa/dsa.txt
+
+Subnodes:
+
+The integrated switch subnode should be specified according to the binding
+described in dsa/dsa.txt.
+
+Optional properties:
+
+- reg-names: litteral names for the device base register addresses, when present
+  must be: "core", "reg", "intrl2_0", "intrl2_1", "fcb", "acb"
+
+- interrupt-names: litternal names for the device interrupt lines, when present
+  must be: "switch_0" and "switch_1"
+
+- brcm,num-gphy: specify the maximum number of integrated gigabit PHYs in the
+  switch
+
+- brcm,num-rgmii-ports: specify the maximum number of RGMII interfaces supported
+  by the switch
+
+- brcm,fcb-pause-override: boolean property, if present indicates that the switch
+  supports Failover Control Block pause override capability
+
+- brcm,acb-packets-inflight: boolean property, if present indicates that the switch
+  Admission Control Block supports reporting the number of packets in-flight in a
+  switch queue
+
+Example:
+
+switch_top@f0b00000 {
+       compatible = "simple-bus";
+       #size-cells = <1>;
+       #address-cells = <1>;
+       ranges = <0 0xf0b00000 0x40804>;
+
+       ethernet_switch@0 {
+               compatible = "brcm,bcm7445-switch-v4.0";
+               #size-cells = <0>;
+               #address-cells = <2>;
+               reg = <0x0 0x40000
+                       0x40000 0x110
+                       0x40340 0x30
+                       0x40380 0x30
+                       0x40400 0x34
+                       0x40600 0x208>;
+               interrupts = <0 0x18 0
+                               0 0x19 0>;
+               brcm,num-gphy = <1>;
+               brcm,num-rgmii-ports = <2>;
+               brcm,fcb-pause-override;
+               brcm,acb-packets-inflight;
+
+               ...
+               switch@0 {
+                       reg = <0 0>;
+                       #size-cells = <0>;
+                       #address-cells <1>;
+
+                       port@0 {
+                               label = "gphy";
+                               reg = <0>;
+                       };
+                       ...
+               };
+       };
+};