CAN bus on imx7 not working

Technical Support
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1

Hi,
I am using imx7d with colibri evaluation kit. I need to log the can data.
I have made the modification as mentioned in the below link.

root@colibri-imx7-emmc:~# ip link set can0 type can bitrate 500000 triple-sampling
Cannot find device "can0"

I am getting this error :Cannot find device “can0”.
BSP i am using is Linux colibri-imx7-emmc 4.1.44-00001-gdd5a082f1307-dirty

I have attached the dmesg.

2

What exact HW version are you using?

3

Hi,
I am using V1.1A

In my dmesg i get this

[ 1.157727] flexcan: probe of 30a10000.can failed with error -110

root@colibri-imx7-emmc:~# dmesg | grep can
[    0.128534] i2c i2c-0: can't use DMA
[    0.129045] i2c i2c-3: can't use DMA
[    1.138618] flexcan 30a10000.can: Looking up xceiver-supply from device tree
[    1.138635] flexcan 30a10000.can: Looking up xceiver-supply property in node /soc/aips-bus@30800d
[    1.138653] 30a10000.can supply xceiver not found, using dummy regulator
[    1.148825] flexcan 30a10000.can: registering netdev failed
[    1.157727] flexcan: probe of 30a10000.can failed with error -110
[    2.182404] can: controller area network core (rev 20120528 abi 9)
[    2.199519] can: raw protocol (rev 20120528)
[    2.206962] can: broadcast manager protocol (rev 20120528 t)
[    2.215837] can: netlink gateway (rev 20130117) max_hops=1

And

root@colibri-imx7-emmc:~# ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:14:2D:2F:7C:A0  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1%1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:2724 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2724 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:196720 (192.1 KiB)  TX bytes:196720 (192.1 Ki
4

Hi @max.tx

Still i am not able to get it to work.

5

Can you provide the full boot log including u-boot?

6

Hi,

bootlog

7

Unfortunately that module is defective, please follow the RMA procedure:

8

Hi,

We have several other modules, i tried that in other two modules also.
Do you say that all the other modules are defective?

9

Hi @dominik.tx ,

We have 10 imx7d modules and we are planning for 300 more for production. CAN interface is a major interface for our product. We have put lot of efforts in developing carrier board and bsp.

What is the solution?

10

New modules do not have this issue.

11

Shall i fill in RMA for all 10 modules?

12

If they match the marking in the comment above, Yes.

13

@dominik.tx
Thanks for the support.

14

CAN bus is factory disabled by NXP on all IMX7D SoC with markings MCIMX7D5EVM10SD and datecode <= 1820
If you have modules with those markings and you require the use of CAN please use RMA to get those modules replaced.