Getting error " disagrees about version of symbol" when loading module

jasonpowell_2 · ‎07-15-2021

Hello Team,

I built this kernel (cross-compile) and obtained the driver module

panel-ilitek-ili9881c.ko.

I also downloaded 5.10.35 BSP from:

And uuu to my i.MX 8M Nano DDR4 EVK board successfully with:

uuu -b emmc_all imx-boot-imx8mnddr4evk-sd.bin-flash_ddr4_evk imx-image-multimedia-imx8mnevk.wic

Booted it ok. But when I tried to load the module panel-ilitek-ili9881c.ko I was getting these error messages:

[ 3478.914984] panel_ilitek_ili9881c: disagrees about version of symbol regulator_enable

[ 3478.922953] panel_ilitek_ili9881c: Unknown symbol regulator_enable (err -22)

[ 3478.930104] panel_ilitek_ili9881c: disagrees about version of symbol devm_regulator_get

[ 3478.938260] panel_ilitek_ili9881c: Unknown symbol devm_regulator_get (err -22)

[ 3478.945573] panel_ilitek_ili9881c: disagrees about version of symbol regulator_disable

[ 3478.953505] panel_ilitek_ili9881c: Unknown symbol regulator_disable (err -22)

insmod: ERROR: could not insert module panel-ilitek-ili9881c.ko: Invalid parameters

What do I need to do at this point in order to load my driver module panel-ilitek-ili9881c.ko successfully?

weidong_sun · ‎07-21-2021

Hi,

1. downloading linux documents

2. decompressing it.

3. Getting / compiling linux source code ( u-boot/kernel/rootfs)

According to i.MX_Yocto_Project_User's_Guide.pdf, download yocto bsp and compile it.

Have a good day!

Regards,

weidong

weidong_sun · ‎07-20-2021

Hi,

5.10.35_2.0.0 kernel source should be downloaded by the command:

You used the wrong kernel source code, so a driver loading error occurred.

try it again, please!

Have a good day!

Regards,

weidong

jasonpowell_2 · ‎07-21-2021

Thanks weidong.

Can you kindly provide the link for the root file system (rootfs) that corresponds to the kernel you indicated in your reply:

5.10.35_2.0.0 kernel source

Regards,

JP