diff options
| author | Ian Abbott <abbotti@mev.co.uk> | 2009-09-21 16:05:01 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-10-09 13:47:25 -0700 |
| commit | 078a10df24ac87d18c2d52fb501ff652f481fb5b (patch) | |
| tree | 575a055f74180138dbd730a6ff45ccc38ba70e3c | |
| parent | 2b49d7c40ec0806d93ced89ac6039ddcf223dea7 (diff) | |
Staging: comedi: ni_65xx.c: fix output inversion problem.
When reading DO subdevice with inverted outputs invert the values read
back from the ports to match the inversion of values written.
Signed-off-by: Frank Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -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 { |