AD4170_REFIN1N_SUP
if (st->vrefs_uv[AD4170_REFIN1N_SUP] == -ENODEV)
*ain_voltage = st->vrefs_uv[AD4170_REFIN1N_SUP];
st->vrefs_uv[AD4170_REFIN1N_SUP] == -ENODEV)
refn = st->vrefs_uv[AD4170_REFIN1N_SUP];
st->vrefs_uv[AD4170_REFIN1N_SUP] = ret == -ENODEV ? -ENODEV : -ret;