void arduino::ZephyrI2C::setClock(uint32_t freq) {
    uint8_t speed = 	I2C_SPEED_STANDARD;
	if(freq >  0x06u ) {
		if(freq == 100000) {
		  speed = I2C_SPEED_STANDARD;
		} else if(freq == 400000) {
		  speed = I2C_SPEED_FAST;
		} else if(freq == 1000000) {
		  speed = I2C_SPEED_FAST_PLUS;
		} else {
		  speed = I2C_SPEED_STANDARD;
		}
	} else {
		speed = (uint8_t) freq;
	}
	uint32_t i2c_cfg = I2C_MODE_CONTROLLER |
					I2C_SPEED_SET(speed);

	if (i2c_configure(i2c_dev, i2c_cfg)) {
		//Serial.println("Failed to configure i2c interface.");
	}
}