TI_ADS7950_MAN_CMD
cmd = TI_ADS7950_MAN_CMD(TI_ADS7950_CR_CHAN(i));
cmd = TI_ADS7950_MAN_CMD(TI_ADS7950_CR_CHAN(ch));
(TI_ADS7950_MAN_CMD(TI_ADS7950_CR_WRITE | st->cmd_settings_bitmask))