bq769x2_configure_voltage_regs(const struct device *dev, struct bms_ic_conf *ic_conf)
{
	int err = 0;

	uint8_t reg12_config;
	uint8_t vregs_enable = 0;

	err = bq769x2_datamem_read_u1(dev, BQ769X2_SET_CONF_REG12,
				      &reg12_config);
	if (err != 0) {
		return -EIO;
	}

	/* clear REG2_EN and REG1_EN bits and keep voltage setting untouched */
	reg12_config &= ~0x11;

	if (ic_conf->vregs_enable &  BIT(1)) {
		reg12_config |= 0x01; /* REG1_EN */
		vregs_enable |= BIT(1);
	}

	if (ic_conf->vregs_enable & BIT(2)) {
		reg12_config |= 0x10; /* REG2_EN */
		vregs_enable |= BIT(2);
	}

	if (config->vregs_enable & BIT(0)) {
		vregs_enable |= BIT(0);
	}

	err = bq769x2_datamem_write_u1(dev, BQ769X2_SET_CONF_REG12,
				       reg12_config);

	if (err != 0) {
		return -EIO;
	}

	/* control REG0 to enable/disable Pre-Regulator */
	err = bq769x2_datamem_write_u1(dev, BQ769X2_SET_CONF_REG0,
				       vregs_enable & BIT(0));	
	if (err != 0) {
		return -EIO;
	}
	ic_conf->vregs_enable = vregs_enable;
	return 0;
}