Merge pull request #40 from HarveyHunt/ci20-v3.18-spi-gpio

DT: Add support for spi-gpio to JZ4780's DT

bitbanging for now. There is a hardware spi module. Driver from 3.0.8 can be used as a base for forward porting by any enthusiast.

arch/mips/boot/dts/jz4780.dtsi

@@ -384,6 +384,25 @@
  };
  };
 
+ spi_gpio {
+ compatible = "spi-gpio";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ num-chipselects = <2>;
+
+ gpio-miso = <&gpe 14 0>;
+ gpio-sck = <&gpe 15 0>;
+ gpio-mosi = <&gpe 17 0>;
+ cs-gpios = <&gpe 16 0
+ &gpe 18 0>;
+
+ spidev@0 {
+ compatible = "spidev";
+ reg = <0>;
+ spi-max-frequency = <1000000>;
+ };
+ };
+
  uart0: serial@10030000 {
  compatible = "ingenic,jz4780-uart";
  reg = <0x10030000 0x100>;