About wifi module issue on imx8mp usdhc1

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About wifi module issue on imx8mp usdhc1

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dskim2
Contributor III

Hi

I am wifi testing with my custorm board.

wifi module is connected to usdhc1 and using 1.8V.

but the information is not correct please see below.

 

root@imx8mp-lpddr4-evk:~#  cat /sys/kernel/debug/mmc1/ios

clock:0 Hz

vdd:0 (invalid)

bus mode:2 (push-pull)

chip select:0 (don't care)

power mode:0 (off)

bus width:0 (1 bits)

timing spec:0 (legacy)

signal voltage:0 (3.30 V)

driver type:0 (driver type B)

yocto version is 6.1.22_2.0.0 and dtb file is imx8mp-evk-usdhc1-m2

 

how can fix it

 

Best Regards

 

 

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jimmychan
NXP TechSupport
NXP TechSupport

https://github.com/nxp-imx/linux-imx/blob/lf-6.1.y/arch/arm64/boot/dts/freescale/imx8mp-evk-usdhc1-m...

As you can see the regulator voltage is 3.3V, you could change it to 1.8V.

 

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