topic Re: CAN interface not working for imx6qsabresd in i.MX Processors

CAN interface not working for imx6qsabresd

devikar — Fri, 26 Apr 2019 08:15:34 GMT

Hi,

We have setup Yocto project 4.9.11_1.0.0 for imx6qpsabresd and need to test CAN interface.
We have enabled flexcan in the device tree for can0 & can1.

We are trying to test using the below commands, But we are not seeing any data in at CAN1_TX (probed with oscilloscope)
> cansend can0 1F334455#1122334455667788
> cansend can1 1F334455#1122334455667788
> canfdtest -v -g can0

CAN ports are getting registered as below. Below are the messages related to CAN interface when it gets booted.

[ 1.644655] 2090000.flexcan supply xceiver not found, using dummy regulator
[ 1.654151] flexcan 2090000.flexcan: gpr /soc/aips-bus@02000000/iomuxc-gpr@020e0000 req_gpr 0x34 req_bit 28 ack_gpr 0x10 ack_bit 17
[ 1.654213] flexcan 2090000.flexcan: device registered (reg_base=c0b1c000, irq=34)
[ 1.663828] 2094000.flexcan supply xceiver not found, using dummy regulator
[ 1.673309] flexcan 2094000.flexcan: gpr /soc/aips-bus@02000000/iomuxc-gpr@020e0000 req_gpr 0x34 req_bit 29 ack_gpr 0x10 ack_bit 18
[ 1.673368] flexcan 2094000.flexcan: device registered (reg_base=c0b24000, irq=35)
[ 4.744549] can: controller area network core (rev 20120528 abi 9)
[ 4.757293] can: raw protocol (rev 20120528)
[ 4.762501] can: broadcast manager protocol (rev 20161123 t)
[ 4.769161] can: netlink gateway (rev 20130117) max_hops=1

Has anybody tried this and succeeded?
Please let us know how we can validate this with some basic tests.

Regards,

Devika R

Re: CAN interface not working for imx6qsabresd

joanxie — Mon, 29 Apr 2019 03:13:52 GMT

pls refer to the chapter 4.6 FlexCAN of enclosed file, to check if you set correct in the kernel

Re: CAN interface not working for imx6qsabresd

devikar — Mon, 29 Apr 2019 06:10:15 GMT

Hi Joan,

Yes, we have already configured the kernel as per the Linux Reference manual.

Re: CAN interface not working for imx6qsabresd

joanxie — Mon, 06 May 2019 08:43:32 GMT

pls refer to the enclosed file

Re: CAN interface not working for imx6qsabresd

devikar — Wed, 08 May 2019 13:17:38 GMT

Hi ,

The document you have shared is referring to ltib, but we are using yocto.

In the Yocto project we have setup has only below CAN utilities.

can-calc-bit-timing

cangen

cansend

canbusload

cangw

cansniffer

candump

canlogserver

canfdtest

canplayer

Please let us know how to add other can utilities like cantest,canecho and canconfig in unit test instructions.

Thanks

Devika

Re: CAN interface not working for imx6qsabresd

joanxie — Thu, 09 May 2019 02:11:52 GMT

for test on imx6q in yocto, you can refer to the link as below:

Regarding can interface in imx6q sabresd

for the package you need, you can find them from :

can-utils/README.md at master · linux-can/can-utils · GitHub

Re: CAN interface not working for imx6qsabresd

adamhuang — Wed, 28 Jul 2021 08:22:19 GMT

IMAGE_INSTALL_append += "libcap iproute2 can-utils "