MC13XXX_RTCTOD
ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTOD, 0);
ret = mc13xxx_reg_write(priv->mc13xxx, MC13XXX_RTCTOD, seconds);
ret = mc13xxx_reg_read(priv->mc13xxx, MC13XXX_RTCTOD, &seconds);