MSA311_PWR_MODE_NORMAL
err = msa311_set_pwr_mode(msa311, MSA311_PWR_MODE_NORMAL);
err = msa311_set_pwr_mode(msa311, MSA311_PWR_MODE_NORMAL);
[MSA311_PWR_MODE_NORMAL] = "normal",
if (pwr_mode == MSA311_PWR_MODE_NORMAL)
mode == MSA311_PWR_MODE_NORMAL)