The analog input on this board can return data as either two's complement or straight binary data. The format is selected by a jumper of the board and enabled by the user as option[4] when attaching to the board.
Replace the adc_coding enum with a simple bool to indicate that the data is returned in two's complement form. Signed-off-by: H Hartley Sweeten <[email protected]> Cc: Ian Abbott <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> --- drivers/staging/comedi/drivers/rti800.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/drivers/staging/comedi/drivers/rti800.c b/drivers/staging/comedi/drivers/rti800.c index 917543a..d788c19 100644 --- a/drivers/staging/comedi/drivers/rti800.c +++ b/drivers/staging/comedi/drivers/rti800.c @@ -152,9 +152,7 @@ static const struct rti800_board rti800_boardtypes[] = { }; struct rti800_private { - enum { - adc_2comp, adc_straight - } adc_coding; + bool adc_2comp; bool dac_2comp[2]; const struct comedi_lrange *ao_range_type_list[2]; unsigned int ao_readback[2]; @@ -221,7 +219,7 @@ static int rti800_ai_insn_read(struct comedi_device *dev, data[i] = inb(dev->iobase + RTI800_ADCLO); data[i] |= (0xf & inb(dev->iobase + RTI800_ADCHI)) << 8; - if (devpriv->adc_coding == adc_2comp) + if (devpriv->adc_2comp) data[i] ^= 0x800; } @@ -338,7 +336,7 @@ static int rti800_attach(struct comedi_device *dev, struct comedi_devconfig *it) return -ENOMEM; dev->private = devpriv; - devpriv->adc_coding = it->options[4]; + devpriv->adc_2comp = (it->options[4] == 0); devpriv->dac_2comp[0] = (it->options[6] == 0); devpriv->dac_2comp[1] = (it->options[8] == 0); /* invalid, forces the MUXGAIN register to be set when first used */ -- 1.8.1.4 _______________________________________________ devel mailing list [email protected] http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
