topic Re: imx8mm microUSB OTG not work in i.MX Processors

imx8mm microUSB OTG not work

FoxYang — Thu, 21 Dec 2023 08:58:06 GMT

Hi,

My customer board need OTG and use microUSB without type-c.

I have reference i.MX8MM & i.MX8MQ USB2.0 Design Without USB TYPE-C

And set device tree :

&usbotg1 {
dr_mode = "otg";
status = "okay";
};

When I connect USB flash drive it's work,but connect to PC it's not work.

Need any setting?

Thanks.

Re: imx8mm microUSB OTG not work

Rita_Wang — Tue, 26 Dec 2023 09:32:52 GMT

Software is like this. You mean you can not download images to board by the usb port from PC? How about your design? The same with the link?

Re: imx8mm microUSB OTG not work

kavita — Tue, 12 Mar 2024 07:08:25 GMT

@John9967,

Hi John,

I have same issue with microB USB2.0 with iMX8MM NXP processor.

I have updated the dts as you suggested. Still the issue persists.

Below is my dtsi:

&usbotg1 {
- dr_mode = "otg";
+ dr_mode = "device";
picophy,pre-emp-curr-control = <3>;
picophy,dc-vol-level-adjust = <7>;
+ extcon = <&extcon_usb1>;
hnp-disable;
srp-disable;
adp-disable;
- snps,dis-u1-entry-quirk;
- snps,dis-u2-entry-quirk;
- extcon = <&typec_ptn5150>;
status = "okay";
+ wakeup-source;
};

+ extcon_usb1: extcon_usb1 {
+ compatible = "linux,extcon-usb-gpio";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_extcon>;
+ id-gpio = <&gpio1 10 GPIO_ACTIVE_HIGH>;
+ status = "okay";
+ };

Guide me to get access using PC. I am willing to use adb.

Thanks in Advance!