dt-bindings: net: Add DT bindings for Socionext Netsec

This patch adds documentation for Device-Tree bindings for the
Socionext NetSec Controller driver.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/Documentation/devicetree/bindings/net/socionext-netsec.txt b/Documentation/devicetree/bindings/net/socionext-netsec.txt
new file mode 100644 (file)
index 0000000..0cff94f
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/socionext-netsec.txt
@@ -0,0 +1,53 @@
+* Socionext NetSec Ethernet Controller IP
+
+Required properties:
+- compatible: Should be "socionext,synquacer-netsec"
+- reg: Address and length of the control register area, followed by the
+       address and length of the EEPROM holding the MAC address and
+       microengine firmware
+- interrupts: Should contain ethernet controller interrupt
+- clocks: phandle to the PHY reference clock
+- clock-names: Should be "phy_ref_clk"
+- phy-mode: See ethernet.txt file in the same directory
+- phy-handle: See ethernet.txt in the same directory.
+
+- mdio device tree subnode: When the Netsec has a phy connected to its local
+               mdio, there must be device tree subnode with the following
+               required properties:
+
+       - #address-cells: Must be <1>.
+       - #size-cells: Must be <0>.
+
+       For each phy on the mdio bus, there must be a node with the following
+       fields:
+       - compatible: Refer to phy.txt
+       - reg: phy id used to communicate to phy.
+
+Optional properties: (See ethernet.txt file in the same directory)
+- dma-coherent: Boolean property, must only be present if memory
+       accesses performed by the device are cache coherent.
+- local-mac-address: See ethernet.txt in the same directory.
+- mac-address: See ethernet.txt in the same directory.
+- max-speed: See ethernet.txt in the same directory.
+- max-frame-size: See ethernet.txt in the same directory.
+
+Example:
+       eth0: ethernet@522d0000 {
+               compatible = "socionext,synquacer-netsec";
+               reg = <0 0x522d0000 0x0 0x10000>, <0 0x10000000 0x0 0x10000>;
+               interrupts = <GIC_SPI 176 IRQ_TYPE_LEVEL_HIGH>;
+               clocks = <&clk_netsec>;
+               clock-names = "phy_ref_clk";
+               phy-mode = "rgmii";
+               max-speed = <1000>;
+               max-frame-size = <9000>;
+               phy-handle = <&phy1>;
+
+               mdio {
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+                       phy1: ethernet-phy@1 {
+                               compatible = "ethernet-phy-ieee802.3-c22";
+                               reg = <1>;
+                       };
+               };