&am33xx_pinmux {
    i2c1_pins_default: i2c1_pins_default {
        pinctrl-single,pins = <
            AM33XX_IOPAD(0x984, PIN_INPUT_PULLUP | MUX_MODE3) /* (D15) uart1_txd.I2C1_SCL */
            AM33XX_IOPAD(0x980, PIN_INPUT_PULLUP | MUX_MODE3) /* (D16) uart1_rxd.I2C1_SDA */
        >;
    };
};

&i2c1 {
    pinctrl-names = "default";
    pinctrl-0 = <&i2c1_pins_default>;
    status = "okay";
    clock-frequency = <400000>;
};