imx6q-sd how to configurate can?

[zhenli]

Hi,

    BSP:linux 3.14

   board:imx6q-sabresd

I add to imx6qdl-sabresd.dtsi :

&flexcan1{

   pinctl-names ="default";

   pinctrl-0 = <&pinctrl_flexcan1_1>;

   status = "okay";

};

   pinctrl_flexcan1_1:flexcan1grp-1{

   fsl,pins = <

        MX6QDL_PAD_GPIO_7__FLEXCAN1_TX 0x80000000 

        MX6QDL_PAD_GPIO_8__FLEXCAN1_RX 0x80000000

         >;

   };

Then I got this:

root@imx6qsabresd:~# dmesg | grep can

[    1.324931] ahci-imx 2200000.sata: SSS flag set, parallel bus scan disabled

[    1.375581] 2090000.can supply xceiver not found, using dummy regulator

[    1.381635] flexcan 2090000.can: device registered (reg_base=c0a88000, irq=142)

[    4.441142] can: controller area network core (rev 20120528 abi 9)

[    4.449269] can: raw protocol (rev 20120528)

[    4.452243] can: broadcast manager protocol (rev 20120528 t)

[    4.456630] can: netlink gateway (rev 20130117) max_hops=1

root@imx6qsabresd:~#

After  that

root@imx6qsabresd:~# ip link set can0 up type can bitrate 125000

flexcan 2090000.can can0: writing ctrl=0x0e312005

root@imx6qsabresd:~# ifconfig can0 up

root@imx6qsabresd:~# ifconfig can0

can0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 

          UP RUNNING NOARP  MTU:16  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:10

          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

          Interrupt:142

cansend can0 112#11223344

But nothing happen,I can not get anything by oscilloscope.

Am I wrong?How to slove it.

Thank you!

[igorpadykov]

Hi zhen

flexcan usage of SabreSD is described on

How to enable CAN bus on i.MX6Q SabreSD

Best regards

igor

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[amit251291]

Hi igorpadykov,

Im not able to open above link. Its showing me unauthorized error. Could you please help me to get the permission to use that link ? Or can you please share it as a pdf ?

[zhenli]

Hi igorpadykov,

  Thanks for your reply!

  I had do as this PDF file,but it can not to use too!

I think my dts file is not correct! 

So i got  2090000.can supply xceiver not found, using dummy regulator

Could you help me?

Thank you very much!

[igorpadykov]

you can ignore this message

~igor

[zhenli]

Hi,

  I guess it's IO register value wrong.

  fsl,pins = <

        MX6QDL_PAD_GPIO_7__FLEXCAN1_TX 0x80000000

        MX6QDL_PAD_GPIO_8__FLEXCAN1_RX 0x80000000

         >;

I tried to use 0x1f0b0 and 0x1b0b1,result not change.

[amit251291]

Hi Zhen,

could you solve this issue ? 
I am also facing the same issue here.

[zhenli]

Thank you for your reply.

   It's noting on my TX pin,I don't know what is wrong with my configuration.

   Everything looks OK,but nothing happend after command "cansend 001#11223344"