diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/comedi/drivers/ni_65xx.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers/ni_65xx.c b/drivers/staging/comedi/drivers/ni_65xx.c index b664ce083fc..bbf75eb6d7f 100644 --- a/drivers/staging/comedi/drivers/ni_65xx.c +++ b/drivers/staging/comedi/drivers/ni_65xx.c @@ -457,6 +457,12 @@ static int ni_65xx_dio_insn_bits(struct comedi_device *dev, port_read_bits = readb(private(dev)->mite->daq_io_addr + Port_Data(port)); /* printk("read 0x%x from port %i\n", port_read_bits, port); */ + if (s->type == COMEDI_SUBD_DO && board(dev)->invert_outputs) { + /* Outputs inverted, so invert value read back from + * DO subdevice. (Does not apply to boards with DIO + * subdevice.) */ + port_read_bits ^= 0xFF; + } if (bitshift > 0) { port_read_bits <<= bitshift; } else { |