RK3588S DTS文件中 fusb302如何进行配置

在RK3588S的DTS文件中，如果要配置fusb302芯片，需要进行以下配置：

1. 声明fusb302节点：

&i2c3 {
    fusb302: fusb302@22 {
        compatible = "fairchild,fusb302";
        reg = <0x22>;
    };
};

2. 配置fusb302节点的属性：

&i2c3 {
    fusb302: fusb302@22 {
        compatible = "fairchild,fusb302";
        reg = <0x22>;

        interrupt-parent = <&gpio>;
        interrupts = <5 IRQ_TYPE_LEVEL_LOW>;

        vbus-gpio = <&gpio GPIO_PD0 GPIO_ACTIVE_LOW>;
        vconn-gpio = <&gpio GPIO_PD1 GPIO_ACTIVE_LOW>;
        reset-gpio = <&gpio GPIO_PD2 GPIO_ACTIVE_LOW>;
        irq-gpio = <&gpio GPIO_PD3 GPIO_ACTIVE_LOW>;
        alert-gpio = <&gpio GPIO_PD4 GPIO_ACTIVE_LOW>;
    };
};

这里的属性包括：

- interrupt-parent和interrupts：用于指定fusb302中断的GPIO引脚，以及中断类型。
- vbus-gpio、vconn-gpio、reset-gpio、irq-gpio和alert-gpio：用于指定fusb302的GPIO引脚，以及GPIO的电平状态。

3. 配置fusb302的驱动程序：

&i2c3 {
    fusb302: fusb302@22 {
        compatible = "fairchild,fusb302";
        reg = <0x22>;

        interrupt-parent = <&gpio>;
        interrupts = <5 IRQ_TYPE_LEVEL_LOW>;

        vbus-gpio = <&gpio GPIO_PD0 GPIO_ACTIVE_LOW>;
        vconn-gpio = <&gpio GPIO_PD1 GPIO_ACTIVE_LOW>;
        reset-gpio = <&gpio GPIO_PD2 GPIO_ACTIVE_LOW>;
        irq-gpio = <&gpio GPIO_PD3 GPIO_ACTIVE_LOW>;
        alert-gpio = <&gpio GPIO_PD4 GPIO_ACTIVE_LOW>;

        status = "okay";
    };

    usb-role-switch {
        compatible = "usb-role-switch";
        #address-cells = <1>;
        #size-cells = <0>;

        usb_role_switch {
            compatible = "gpio-usb-role-switch";
            gpios = <&gpio GPIO_PE3 GPIO_ACTIVE_HIGH>;
            vbus-supply = <&vcc_usb>;
            debounce = <50>;
        };
    };
};

这里的驱动程序包括：

- status = "okay"：用于启用fusb302设备。
- usb-role-switch和gpio-usb-role-switch：用于配置USB角色开关的GPIO引脚，以及vbus电源的供应。