4.9 USB调试

4.9.1 硬件原理分析

根据上图可得出

1、VCC5V0_USB_OTG由GPIO0_5控制
2、VCC5V0_USG_HOST2和VCC5V0_USB_HOST3由GPIO0_A6控制
3、USB_HUB_RST由GPIO3_A3控制

4.9.2 DTS配置

知道上面的信息，我们就可以来配置USB了

{
    vcc5v0_host: vcc5v0-host-regulator {
        compatible = "regulator-fixed";
        regulator-name = "vcc5v0_host";
        regulator-boot-on;
        regulator-always-on;
        regulator-min-microvolt = <5000000>;
        regulator-max-microvolt = <5000000>;
        enable-active-high;
        gpio = <&gpio0 RK_PA6 GPIO_ACTIVE_HIGH>;
        vin-supply = <&vcc5v0_usb>;
        pinctrl-names = "default";
        pinctrl-0 = <&vcc5v0_host_en>;
    };

    usb_hub_rst: usb-hub-rst {
        compatible = "regulator-fixed";
        regulator-name = "usb_hub_rst";
        regulator-boot-on;
        regulator-always-on;
        regulator-min-microvolt = <5000000>;
        regulator-max-microvolt = <5000000>;
        enable-active-high;
        gpio = <&gpio3 RK_PA3 GPIO_ACTIVE_HIGH>;
        vin-supply = <&vcc5v0_usb>;
        pinctrl-names = "default";
        pinctrl-0 = <&usb_hub_rst_gpio>;
    };

    vcc5v0_otg: vcc5v0-otg-regulator {
        compatible = "regulator-fixed";
        regulator-name = "vcc5v0_otg";
        regulator-min-microvolt = <5000000>;
        regulator-max-microvolt = <5000000>;
        enable-active-high;
        gpio = <&gpio0 RK_PA5 GPIO_ACTIVE_HIGH>;
        vin-supply = <&vcc5v0_usb>;
        pinctrl-names = "default";
        pinctrl-0 = <&vcc5v0_otg_en>;
    };
};

&u2phy0_host {
    phy-supply = <&vcc5v0_host>;
    status = "okay";
};

&u2phy0_otg {
    vbus-supply = <&vcc5v0_otg>;
    status = "okay";
};

&u2phy1_host {
    phy-supply = <&vcc5v0_host>;
    status = "okay";
};

&u2phy1_otg {
    phy-supply = <&vcc5v0_host>;
    status = "okay";
};

&usb2phy0 {
    status = "okay";
};

&usb2phy1 {
    status = "okay";
};

&usb_host0_ehci {
    status = "okay";
};

&usb_host0_ohci {
    status = "okay";
};

&usb_host1_ehci {
    status = "okay";
};

&usb_host1_ohci {
    status = "okay";
};

&usbdrd_dwc3 {
    dr_mode = "otg";
    vbus-supply = <&vcc5v0_otg>;
    extcon = <&usb2phy0>;
    status = "okay";
};

&usbdrd30 {
    status = "okay";
};

&usbhost_dwc3 {
    status = "okay";
};

&usbhost30 {
    status = "okay";
};

由于USB用途比较广泛, RK3568_ANDROID11_SDK中默认已经有驱动和在rockchip_defconfig中已配置，我们只需要根据硬件配置好dts，烧写固件后即可通过插入鼠标、键盘、U盘等USB设备验证

4.9.3 详细参考文档

USB的详细配置说明及常见问题分析请参考《Rockchip_RK356X_User_Guide_USB_CN.pdf》。
文档路径：rk356x_android11_sdk/RKDocs/common/usb/