topic Re: Problems with WIFI/wlan Support on Imx8 in i.MX Processors

Problems with WIFI/wlan Support on Imx8

ranjing — Mon, 15 Jun 2020 11:02:20 GMT

Hi everyone:
I am porting wifi module on my DEMO-board with imx8Quad chip,the board I am using is highly similar to imx8QuadXPlus. The wifi module is ublox JODY-W163 series,and I have succeeded in porting this wifi module on my board under yocto 4.14.78.1.0.0 project,but when I update yocto project to 4.14.98.2.3.0,the brcmfmac-sdio driver doesn't work as I expected.The main kernel dts changes can be seen in attached files .
when booting kernel ,the 4.14.78 log about brcmfmac-sdio driver shows below:
[ 2.854654] mmc0: SDHCI controller on 5b010000.usdhc [5b010000.usdhc] using A
[ 2.867220] sdhci-esdhc-imx 5b020000.usdhc: allocated mmc-pwrseq
[ 2.873323] sdhci-esdhc-imx 5b020000.usdhc: assigned as wifi host
[ 2.881726] mmc_pwrseq_simple_pre_power_on--> 1
[ 2.910638] mmc_pwrseq_simple_post_power_on--> 0
[ 2.964874] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
[ 2.970461] mmc0: new HS200 MMC card at address 0001
[ 4.114331] mmc1: new high speed SDIO card at address 0001
[ 4.120320] SDIO brcmf_ops_sdio_probe Enter-->
ffs.utp0[ 4.125063] SDIO brcmf_ops_sdio_probe Enter-->

whie booting kernel with yocto project 4.14.98.2.3.0,the log only shows:
[ 2.197300] mmc1: SDHCI controller on 5b020000.usdhc [5b020000.usdhc] using A

After bring-up,the wifi modules(compat.ko cfg80211.ko brcmutil.ko brcmfmac.ko) are successfully insmod,but the wlan0 interface doesn't show up

How should I make wifi module detected by SDIO driver?Any suggestion will be appreciated.

Re: Problems with WIFI/wlan Support on Imx8

igorpadykov — Mon, 15 Jun 2020 23:35:13 GMT

Hi Jing

one can try with last brcmfmac drivers and post issues on Welcome | Cypress Developer Community

Cypress Linux WiFi Driver Release (FMAC) [2020-... | Cypress Developer Community

Best regards
igor
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Re: Problems with WIFI/wlan Support on Imx8

ranjing — Tue, 16 Jun 2020 01:43:20 GMT

Hi igor

Thanks for reply! I will post my issues on cypress community. I have also tried to compile the latest brcmfmac drivers ,but failed. I do believe this issue is caused by DTS files change,or any suggestions about which porting procedure may cause this problem?