USB detection on i.MX8MM

[dpog]

I'm having problems configuring the USB-Port, assumingly the problem lies within the device tree. The USB is used as a host, but when I state dr_mode="host", the Port is only powered for a short time in the kernel boot, when I set it to "peripheral" or "otg", the power stays on. 

In all cases I'm unable to see the device (USB Mass Storage) from the userspace with lsblk. Any suggestions?

reg_usb_b_vbus: regulator-usbotg2 {

        compatible = "regulator-fixed";

        pinctrl-names = "default";

        pinctrl-0 = <&pinctrl_reg_usb_b_vbus>;

        regulator-name = "USB_B_VBUS";

        regulator-min-microvolt = <5000000>;

        regulator-max-microvolt = <5000000>;

        gpio = <&gpio1 14 GPIO_ACTIVE_HIGH>;

        enable-active-high;

    };

&usbotg2 { /* USB B - Type A */

    dr_mode = "host";

    vbus-supply = <&reg_usb_b_vbus>;

    over-current-active-high;

    status = "okay";

};

pinctrl_reg_usb_b_vbus: reg_usbb_vbus {

        fsl,pins = <

            MX8MM_IOMUXC_GPIO1_IO14_USB2_OTG_PWR    0x41

        >;

    };

[dpog · Accepted solution]

The problem was resolved by moving the pinctrl section to the usbotg node and configuring the regulator-gpio as a gpio in the pin config

[Rita_Wang]

How is your USB2 design, used as host ( Type A )? Can the usb2 can work well on the host?

[dpog]

I'm not sure if I understand your question correctly. The Datalines are connected to the iMX8MM without a Phy, the OC and PWR_EN go to a AP22615AWU-7 for current protection.

[Rita_Wang]

Can you share the section schematic to us?

[dpog]

Of course, to clarify: the iMX8 is part of a SoM, the USB-Connector resides on the BaseBoard, so USB-2 corresponds to USB-B