Enable USB_VBUS on demand iMX8M Mini

dpog — Mon, 13 Feb 2023 09:22:25 GMT

Is there a way to toggle the USB VBUS only on demand? My current design switches on the VBUS on Kernel-startup, but it does not turn it off when nothing is connected. The port is configured as host, the gpio1_14 corresponds to the USB2_PWR_EN-Pin. I tried to use the ID-Pin for toggling, only to have no voltage at all on the port.

reg_usb_b_vbus: regulator@2 {

compatible = "regulator-fixed";

regulator-name = "USB_B_VBUS";

regulator-min-microvolt = <5000000>;

regulator-max-microvolt = <5000000>;

gpio = <&gpio1 14 GPIO_ACTIVE_HIGH>;

off-on-delay = <20000>;

enable-active-high;

};

&usbotg2 {

vbus-supply = <&reg_usb_b_vbus>;

over-current-active-low;

dr_mode = "host";

pinctrl-names = "idle", "active";

pinctrl-0 = <&pinctrl_usb2_idle>;

pinctrl-1 = <&pinctrl_usb2_active>;

status = "okay";

};

Re: Enable USB_VBUS on demand iMX8M Mini

Rita_Wang — Wed, 15 Feb 2023 08:49:57 GMT

What's your design for the USB2? Could you share us the schematic of this section?

Re: Enable USB_VBUS on demand iMX8M Mini

dpog — Wed, 15 Feb 2023 11:06:30 GMT

It's the same design I mentioned earlier in this post:
https://community.nxp.com/t5/i-MX-Processors/USB-detection-on-i-MX8MM/m-p/1584663

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Enable USB_VBUS on demand iMX8M Mini

Re: Enable USB_VBUS on demand iMX8M Mini

Re: Enable USB_VBUS on demand iMX8M Mini