topic Re: imx8qm flexcan failed to initialize sometimes in i.MX Processors

imx8qm flexcan failed to initialize sometimes

jack-cap — Sat, 09 May 2020 08:12:24 GMT

HI NXP,

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

Re: imx8qm flexcan failed to initialize sometimes

igorpadykov — Sat, 09 May 2020 15:04:05 GMT

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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Re: imx8qm flexcan failed to initialize sometimes

pressmans — Sun, 10 May 2020 07:29:35 GMT

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.

Re: imx8qm flexcan failed to initialize sometimes

jack-cap — Mon, 11 May 2020 03:03:59 GMT

@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.

Re: imx8qm flexcan failed to initialize sometimes

jack-cap — Mon, 01 Jun 2020 03:57:14 GMT

Is any else advice about flexcan init?

Re: imx8qm flexcan failed to initialize sometimes

之金叶 — Fri, 19 Jun 2020 07:43:53 GMT

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！

Re: imx8qm flexcan failed to initialize sometimes

rahulM — Wed, 24 Feb 2021 07:12:54 GMT

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