MINIARM: Add spidev node for spi2 interface

Change-Id: I8724d537d73fc21ef932f991b795536c5876c536
Signed-off-by: yi-hsin_hung <yi-hsin_hung@asus.com>

arch/arm/boot/dts/rk3288-miniarm.dts

@@ -489,9 +489,13 @@
 	status = "okay";
 };
 
+
 &spi2 {
 	status = "okay";
 	max-freq = <50000000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi2_clk &spi2_tx &spi2_rx &spi2_cs0 &spi2_cs1>;
+	#address-cells = <2>;
 
 	spidev@0 {
 		compatible = "rockchip,spi_tinker";

drivers/spi/spidev.c

@@ -695,6 +695,7 @@ static struct class *spidev_class;
 static const struct of_device_id spidev_dt_ids[] = {
 	{ .compatible = "rohm,dh2228fv" },
 	{ .compatible = "lineartechnology,ltc2488" },
+        { .compatible = "rockchip,spi_tinker" },
 	{},
 };
 MODULE_DEVICE_TABLE(of, spidev_dt_ids);