Unable to get TCA9548A to work

[npant333]

I am trying to use TCA9548A using zephyr. The following code returns error that "Device is not ready". I have connected the hardware properly i.e. SDA/SCL/GND/Vcc are connected properly between my processor and TCA9548A

Any help in what is not correct here?

const struct device *i2c_dev = device_get_binding(DEVICE_DT_GET(DT_NODELABEL(ch0)));
if (!device_is_ready(i2c_dev)) {
printk("Device is not ready.\n");
return;
}

The overlay file is as follows

&i2c0 {
status = "okay";
mux: tca9548a@70 {
compatible = "ti,tca9548a";
reg = <0x70>;
status = "okay";
label = "i2c_mux";
#address-cells = <1>;
#size-cells = <0>;

	ch0: mux_i2c@0 {
		compatible = "ti,tca9548a-channel";
		label = "mux_dw_0";
		reg = <0>;
		#address-cells = <1>;
		#size-cells = <0>;
	};

	ch1: mux_i2c@1 {
		compatible = "ti,tca9548a-channel";
		label = "mux_dw_1";
		reg = <1>;
		#address-cells = <1>;
		#size-cells = <0>;
    };
};

};

[carlocaione]

const struct device *i2c_dev = DEVICE_DT_GET(DT_NODELABEL(ch0));