Question, how to fix USB speed into 'full', i.MX6Q

[SLICE]

Dear team,

My customer is using i.MX6Q and their software is based on Linux(L 3.14.28).

My customer is trying to reduce communication speed of USB to 12MBps(Full-speed).

They want to fix the speed to ‘full-speed’ due to its anti-noise capability.

They have wrote the followings into &usbhi and &usbotg in DTSI file, but the speed was still ‘hi speed(480Mbps)’.

maximum-speed=”full-speed”

Could you show me how to fix the speed into ‘full-speed’?

And could show me why the speed does not fix to full-speed when they wrote as above?

Actually, they have achieved by modifying usb/chipidea/core.c file.

But they still need to know the way they did is right.

Thanks,

Miyamoto

[art]

Unfortunately, the option you describe does not work through the .dts file due to the software bug. So, your customer did it the right way.

Have a great day,
Artur

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