imx8qm flexcan failed to initialize sometimes

[jack-cap]

HI NXP,

i.MX Processors

I use imx8qm android P OS on IMX8QM MEK BOARD. I found that flex can failed to initialize sometimes. the intialization failure probability is about five percent . please help to analysis the question. thanks a lot !

the log that flexcan failed to initialize is as follows:

‌

[    9.133580] CAN device driver interface
[    9.138411] flexcan 5a8d0000.can: 5a8d0000.can supply xceiver not found, using dummy regulator
[    9.147350] flexcan 5a8d0000.can (unnamed net_device) (uninitialized): Could not enable RX FIFO, unsupported core
[    9.157624] flexcan 5a8d0000.can: registering netdev failed
[    9.163904] flexcan 5a8e0000.can: 5a8e0000.can supply xceiver not found, using dummy regulator
[    9.172731] flexcan 5a8e0000.can (unnamed net_device) (uninitialized): Could not enable RX FIFO, unsupported core
[    9.183044] flexcan 5a8e0000.can: registering netdev failed
[    9.189092] flexcan 5a8f0000.can: 5a8f0000.can supply xceiver not found, using dummy regulator
[    9.197897] flexcan 5a8f0000.can (unnamed net_device) (uninitialized): Could not enable RX FIFO, unsupported core
[    9.208193] flexcan 5a8f0000.can: registering netdev failed

[rahulM]

Hi NXP,

I am facing similar issue that, my can01 and can2 is not enabling at all in IMX8qm i think it is enable in m4.
Please let us know how to enable on A-53, following logs after system boots

root@imx8qmmek:~# [ 35.927014] vref_1v8: disabling
[ 35.930173] epdev_on: disabling
[ 35.933383] SD1_SPWR: disabling
[ 35.936594] can01-en: disabling
[ 35.939788] can2-en: disabling
[ 35.942853] can01-stby: disabling
[ 35.946209] can2-stby: disabling
[ 64.599200] cfg80211: failed to load regulatory.db

Please let me know changes has to be 

using imx8qm-mek.dtb

i.MX Linux Yocto Project BSP 5.4.47_2.2.0 Release

Thanks and Regards,

rahulM

[之金叶]

hi，i have question：

IMX8QM usbotg2 can not use，https://community.nxp.com/message/1303420；

do you tell me how to resolve，thanks very much！

[pressmans]

This Quickstart guide describes the tools and provides the know-how to install and work with paygonline the Linux Board Support Package (BSP) for the phyCORE-i.MX8QM Alpha Kit. 

[igorpadykov]

Hi yingjin

one can check on below link Android documentation (Release Notes, p1)

if approriate release used in the case, as not all releases support i.MX8QM.

For example P9.0.0_2.3.5 supports only i.MX8QXP.

i.MX Software and Development Tools | NXP 

Best regards
igor
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[jack-cap]

Is any else advice about flexcan init?

[jack-cap]

@igorpadykov 

hi igorpadykov,

I found flexcan init fail sometimes , the failure probability is five percent. the success probalibity  is ninety five percent.

So please analysis the question. because the imx8qm mek board has the same question when reboot system.