Can't see any i2c device in /dev/ directory (like dev/i2c-0 and dev/i2c-1)

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Can't see any i2c device in /dev/ directory (like dev/i2c-0 and dev/i2c-1)

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henry801211
Contributor I

Dear all,

 

I have loaded the compiled QorIQ-SDK-V1.2-20120614-yocto linux kernel module on p1021 (2C, 900M) based board and get into linux prompt. Then I try to let it support for i2c interface.

I have modified menuconfig like below:


                  <*> I2C/SMBus Test Stub

And modified device tree as below:

soc@ffe00000 {
     ranges = <0x0 0x0 0xffe00000 0x100000>;
     #address-cells = <0x1>;
     #size-cells = <0x1>;
     device_type = "soc";
     compatible = "fsl,p1021-immr", "simple-bus";
     bus-frequency = <0x0>;
     i2c1: i2c@3000 {
       status = "okay";
       #address-cells = <0x1>;
       #size-cells = <0x0>;
       cell-index = <0x0>;
       compatible = "fsl-i2c";
       reg = <0x3000 0x100>;
       interrupts = <0x2b 0x2 0x0 0x0>;
       dfsrr;
      };
      i2c2: i2c@3100 {
             status = "okay";
             #address-cells = <0x1>;
             #size-cells = <0x0>;
             cell-index = <0x1>;
             compatible = "fsl-i2c";
             reg = <0x3100 0x100>;
             interrupts = <0x2b 0x2 0x0 0x0>;
             dfsrr;
       };
    ...
 };

After load the kernel, I can't see any i2c device in /dev/ directory (dev/i2c-0 and dev/i2c-1). And can't see any file in /sys/class/i2c-dev/ directory.

root@p1021rdb:/# ls /dev/i2c*
ls: /dev/i2c*: No such file or directory
root@p1021rdb:
root@p1021rdb:~# ls /sys/class/i2c-dev/
root@p1021rdb:

 

And I try to modify menuconfig to set I2C device interface as modularizes (<M> I2C device interface). But when I use modprobe command, it show below error.

root@p1021rdb:/mnt# modprobe i2c-dev
modprobe: module i2c-dev not found in modules.dep

Can someone guide me how to resolve this issue? What could be going wrong here?

 

Thanks for your help,

Best Regards, 

Henry 

Tags (2)
1 Reply

594 Views
Pavel
NXP TechSupport
NXP TechSupport

Test interrupts on your board using the following command:

cat /proc/interrupts

 

Is there interrupt from I2C?


Have a great day,
Pavel Chubakov

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