# Enable a USB controller in Device mode

Enable the USB controller in Device mode by enabling the PHY and
controller device nodes.

To enable a USB controller in Device mode:

1. Open the device tree file:

root/arch/arm64/boot/dts/qcom/glymur.dtsi
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2. Enable the eUSB2 PHY node.
3. Enable the USB3 PHY node.
4. Enable the USB controller node.
5. Set the `dr_mode` property to `peripheral` on the controller node.

    For example:

&usb2_phy_0 {
            status = "okay";
        };
        
        &usb3_phy_0 {
            status = "okay";
        };
        
        &usb0 {
            status = "okay";
        
            dwc3@a600000 {
                dr_mode = "peripheral";
                status = "okay";
            };
        };
        
        /* USB1 PHY + controller */
        
        &usb2_phy_1 {
            status = "okay";
        };
        
        &usb3_phy_1 {
            status = "okay";
        };
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## Related

- [Configure UEFI USB](https://docs.qualcomm.com/doc/80-A0399-8/topic/configure-uefi-usb.html)
- [Debug the USB interface](https://docs.qualcomm.com/doc/80-A0399-8/topic/debug-usb.html)
- [Troubleshoot the USB interface](https://docs.qualcomm.com/doc/80-A0399-8/topic/troubleshoot-usb.html)

Last Published: Sep 17, 2026

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