LINESTAT_NACK_DET
#define LINESTAT_ACK_OR_NACK_DET (LINESTAT_ACK_DET | LINESTAT_NACK_DET)
[CMD_RET_ACK] = LINESTAT_ACK_DET | LINESTAT_NACK_DET,
(i2c->line_status & LINESTAT_NACK_DET &&
} else if (i2c->line_status & LINESTAT_NACK_DET) {