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SK-TDA4VM: GPIO控制

Part Number: SK-TDA4VM

您好,我想将J24的PRG0_PRU1_GPO14(GPIO0_77)控制为低电平

我在设备树中添加了pinmux

    mygpio0_pins_default: mygpio0_pins_default {
        pinctrl-single,pins = <
            J721E_IOPAD(0x138, PIN_OUTPUT, 7) /* (AE25) PRG0_PRU1_GPO14.GPIO0_77 */
        >;
    };

以及

&main_gpio0 {
    my_gpio_13 {
        gpios = <77 GPIO_ACTIVE_LOW>;
    };
};

但是始终无法将其状态置为低电平

请问我该怎么做