VAR-SOM-MX6 SPI

Testing SPI from user space require some changes.

• Configure your kernel and add spidev driver. Device Drivers -> SPI support -> <*> User mode SPI device driver support
  
• Add spidev to your device tree
  

&ecspi1 {
	fsl,spi-num-chipselects = <1>;
	cs-gpios = <&gpio4 9 0>;
	pinctrl-names = "default";
	pinctrl-0 = <&pinctrl_ecspi1_2>;
	status = "okay";

        chip1: spidev@0 {
               compatible = "spidev";
               spi-max-frequency = <12000000>;
               reg = <0>;
        };
/*
        chip2: spidev@1 {
               compatible = "spidev";
               spi-max-frequency = <20000000>;
               reg = <1>;
	};
*/
};

Pick and choose the right chip select and you can also have multiple chip selects.

• Compile the Linux kernel and device tree.
• For testing use the application:
  https://raw.githubusercontent.com/varigit/linux-2.6-imx/master/Documentation/spi/spidev_test.c