Can't open device. No such a file/directory

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Can't open device. No such a file/directory

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rutuja_patil
Contributor II

I am working on imx8mmevk. I have configured for ecspi2 "fsl-imx8mm.dtsi" as :

ecspi2: ecspi@30830000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,imx8mm-ecspi", "fsl,imx51-ecspi";
reg = <0x0 0x30830000 0x0 0x10000>;

clocks = <&clk IMX8MM_CLK_ECSPI2_ROOT>,
<&clk IMX8MM_CLK_ECSPI2_ROOT>;
clock-names = "ipg", "per";
status = "disabled";
};

Configuration for "fsl-imx8mm-evk.dts" are as follow:

&ecspi2 {     fsl,spi-num-chipselects = <1>;     cs-gpios = <0>;     pinctrl-names = "default";     pinctrl-0 = <&pinctrl_ecspi2>;     status = "okay";
spi@0 {

compatible = "spidev";

reg = <0>;
spi-cs-high;
spi-max-frequency = <10000000>;
status = "okay";     }; };
At application I had written code for spi loopback mode, where I had called device static const char *device = "/dev/spidev1.0"; When I flash code on imx8mmevk, run command
spi -D /dev/spidev1.0
I get error, can't open device. No such file/directory. I had checked /dev. It is empty. How to test spi in loopback mode?

					
				
			
			
				
			
			
				
			
			
			
			
			
			
		
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igorpadykov
NXP TechSupport
NXP TechSupport

Hi Rutuja

one can look at attached escpi2 dts example,

For application one can reuse ecspi unit test:

mxc_spi_test1.c\mxc_spi_test\test - imx-test - i.MX Driver Test Application Software 

Best regards
igor
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rutuja_patil
Contributor II

Hello,

I had same modification. I had added dts patch & defconfig  in .bbapend file. Still I am unable to find spidev in /dev. 

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