How to use Wi-Fi/Bluetooth module (IW416 chipset) on i.MX8M Plus EVK

[tanoue]

I would like to use Wi-Fi/Bluetooth module on i.MX8M Plus EVK.

This board comes with AW-CM276MA(88W8997 chipset) as standard, then I'm trying to use AW-AM510MA(IW416 chipset) instead.

Refer to "4.1" and "5.5" in UM11483(Getting Started with NXP-based Wireless Modules on i.MX 8M Quad EVK Running Linux OS),  I tried it with pre-built image but I could not get 'attach logs' and mlan0 network interface.

My log is attached here.

I read the following post then tried to do it, but I could not find "/lib/firmware/nxp/wifi_mod_para.conf"

https://community.nxp.com/t5/i-MX-Processors/How-to-configure-Yocto-to-enable-WiFi-BT-on-the-i-MX8-M...

Could you help to me?

Best Regards.

tanoue.

[shaun_wu]

Hello @tanoue 

You could find it in yocto project source code. you could find it in following path: imx-bsp-yocto-5.4.70/build_xwayland/tmp/work-shared/imx8mpevk/kernel-source/arch/arm64/boot/dts/freescale/

Best Regards

Shaun

[tanoue]

Hi, @shaun_wu .

I found dts files.

I thought the module does not worked because usdhc1_pwrseq was not written on "imx8mp-evk.dts".

Is it correct？

Best Regards.

Tanoue.

[shaun_wu]

Hello @tanoue 

You could check device tree first. the demo 'dts' file didn't add usdhc1. 

Best Regards

Shaun

[tanoue]

Hi, @shaun_wu 

I'm sorry, but I'm a Linux newbie.

What do you mean your "first"?

I checked the both device trees on the board before and after the change with the following command.

ls /proc/device-tree

Then, I found that 'usdhc1_pwrseq' was added.

Best Regards.

tanoue

[shaun_wu]

Hello @tanoue 

8997 module is work right?

iw416 only support sdio signal, if you use M.2 interface, default image don't support M.2 sdio. You need use following dtb file. 'imx8mp-evk-usdhc1-m2.dtb'

Best Regards

Shaun

[tanoue]

Hi, @shaun_wu 

Thank you for replying to my question.

Yes, 8997 module is working.

Based on your advice, referred to "4.4.3" in UM11483 and this topic, I tried it again.

I could control the IW416 chipset module on i.MX8M Plus EVK.

Its way shown below.

u-boot=> setenv fdtfile imx8mp-evk-usdhc1-m2.dtb
u-boot=> saveenv
Saving Environment to MMC... Writing to MMC(2)... OK
u-boot=> reset

In addition, I have two questions for you. (I should really create a separate topic.)

How did you know 'imx8mp-evk-usdhc1-m2.dtb' would be appropriate?

If possible, let me know how to customize dtb for my board that I will make in the future.