em_write_eeprom
em_write_eeprom(hw, 0x23, 1, &eeprom_data);
em_write_eeprom(hw, word, 1, &eeprom_data);
if (em_write_eeprom(hw, EEPROM_CHECKSUM_REG, 1, &checksum) < 0) {
int32_t em_write_eeprom(struct em_hw *hw, uint16_t reg, uint16_t words, uint16_t *data);