Trying to interface a GPS module with my AVR using UART in Zephyr RTOS

#include <zephyr.h>
#include <device.h>
#include <drivers/uart.h>
#include <logging/log.h>

LOG_MODULE_REGISTER(main);

#define GPS_UART DT_NODELABEL(gps)

void main(void) {
    const struct device *uart_dev = DEVICE_DT_GET(GPS_UART);

    if (!device_is_ready(uart_dev)) {
        LOG_ERR("UART device not ready");
        return;
    }

    uint8_t data;
    while (1) {
        if (uart_poll_in(uart_dev, &data) == 0) {
            LOG_INF("Received: %c", data);
        }
    }
}