i.MX ProcessorsのトピックRe: Is it necessary to configure USB ?

Is it necessary to configure USB ?

okwaj — Wed, 07 Oct 2020 14:54:09 GMT

Hi All,

I have 2 USB connected to my iMX6.

The first one is connected to CPU_USB2_D_N and CPU_USB2_D_P pins.
The second one is connected to USB_OTG1_DN and USB_OTG1_DP.

In the reference guide, it is said that the interface are natives.

Does it means that I have nothing to put inside the dtsi file to configure them ?

Re: Is it necessary to configure USB ?

Bio_TICFSL — Thu, 08 Oct 2020 13:03:47 GMT

Hello Okwaj,

If you are using a dtb from Sabre board you don´t need because is there. but if you are on a custom board you have to take a look at the IOMUX that affects that USB, if there is none you don´t need it.

Regards

Re: Is it necessary to configure USB ?

okwaj — Mon, 12 Oct 2020 14:23:12 GMT

I am using a compulab imx6ul and it doesn't seem to work without configuration.

My 2 USB are plugged to pin 170/172 and 176/178 but I don't understand how to configure them in the dtsi file.

Re: Is it necessary to configure USB ?

okwaj — Thu, 22 Oct 2020 12:12:52 GMT

Just had to do :

&usbotg1 {
dr_mode = "host";
disable-over-current;
status = "okay";
};

&usbotg2 {
dr_mode = "host";
disable-over-current;
status = "okay";
};