LTC2992_IADC_NANOV_LSB
*val = DIV_ROUND_CLOSEST(reg_val * LTC2992_IADC_NANOV_LSB, st->r_sense_uohm[channel]);
cmax = DIV_ROUND_CLOSEST_ULL(0xFFFULL * LTC2992_IADC_NANOV_LSB,
LTC2992_IADC_NANOV_LSB),
LTC2992_IADC_NANOV_LSB,
LTC2992_IADC_NANOV_LSB,
LTC2992_IADC_NANOV_LSB),