[PATCH v3 net-next 4/5] dsa: Add spi support to Microchip KSZ switches

[Woojung.Huh]

From: Woojung Huh <woojung....@microchip.com>

A sample SPI configuration for Microchip KSZ switches.

Signed-off-by: Woojung Huh <woojung....@microchip.com>
Reviewed-by: Andrew Lunn <and...@lunn.ch>
---
 Documentation/devicetree/bindings/net/dsa/ksz.txt | 73 +++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/dsa/ksz.txt

diff --git a/Documentation/devicetree/bindings/net/dsa/ksz.txt 
b/Documentation/devicetree/bindings/net/dsa/ksz.txt
new file mode 100644
index 0000000..8a13966
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/dsa/ksz.txt
@@ -0,0 +1,73 @@
+Microchip KSZ Series Ethernet switches
+==================================
+
+Required properties:
+
+- compatible: For external switch chips, compatible string must be exactly one
+  of: "microchip,ksz9477"
+
+See Documentation/devicetree/bindings/dsa/dsa.txt for a list of additional
+required and optional properties.
+
+Examples:
+
+Ethernet switch connected via SPI to the host, CPU port wired to eth0:
+
+               eth0: ethernet@10001000 {
+                       fixed-link {
+                               reg = <7>
+                               speed = <1000>;
+                               duplex-full;
+                       };
+               };
+
+               spi1: spi@f8008000 {
+                       pinctrl-0 = <&pinctrl_spi_ksz>;
+                       cs-gpios = <&pioC 25 0>;
+                       id = <1>;
+                       status = "okay";
+
+                       ksz9477: ksz9477@0 {
+                               compatible = "microchip,ksz9477";
+                               reg = <0>;
+
+                               spi-max-frequency = <44000000>;
+                               spi-cpha;
+                               spi-cpol;
+
+                               status = "okay";
+                               ports {
+                                       #address-cells = <1>;
+                                       #size-cells = <0>;
+                                       port@0 {
+                                               reg = <0>;
+                                               label = "lan1";
+                                       };
+                                       port@1 {
+                                               reg = <1>;
+                                               label = "lan2";
+                                       };
+                                       port@2 {
+                                               reg = <2>;
+                                               label = "lan3";
+                                       };
+                                       port@3 {
+                                               reg = <3>;
+                                               label = "lan4";
+                                       };
+                                       port@4 {
+                                               reg = <4>;
+                                               label = "lan5";
+                                       };
+                                       port@5 {
+                                               reg = <5>;
+                                               label = "cpu";
+                                               ethernet = <&eth0>;
+                                               fixed-link {
+                                                       speed = <1000>;
+                                                       full-duplex;
+                                               };
+                                       };
+                               };
+                       };
+               };
-- 
2.7.4