Use the subdevice 'state' variable instead of carrying the state of
the output channels in the private data.
Use comedi_dio_update_state() to handle the boilerplate code to update
the subdevice s->state.
Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Cc: Ian Abbott <abbotti@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/comedi/drivers/das16m1.c | 22 ++++++----------------
1 file changed, 6 insertions(+), 16 deletions(-)
diff --git a/drivers/staging/comedi/drivers/das16m1.c b/drivers/staging/comedi/drivers/das16m1.c
index b943c44..187b0a1 100644
--- a/drivers/staging/comedi/drivers/das16m1.c
+++ b/drivers/staging/comedi/drivers/das16m1.c
@@ -134,7 +134,6 @@ struct das16m1_private_struct {
* counter yet (loaded by first sample conversion) */
u16 initial_hw_count;
short ai_buffer[FIFO_SIZE];
- unsigned int do_bits; /* saves status of digital output bits */
unsigned int divisor1; /* divides master clock to obtain conversion speed */
unsigned int divisor2; /* divides master clock to obtain conversion speed */
unsigned long extra_iobase;
@@ -393,22 +392,13 @@ static int das16m1_di_rbits(struct comedi_device *dev,
static int das16m1_do_wbits(struct comedi_device *dev,
struct comedi_subdevice *s,
- struct comedi_insn *insn, unsigned int *data)
+ struct comedi_insn *insn,
+ unsigned int *data)
{
- struct das16m1_private_struct *devpriv = dev->private;
- unsigned int wbits;
-
- /* only set bits that have been masked */
- data[0] &= 0xf;
- wbits = devpriv->do_bits;
- /* zero bits that have been masked */
- wbits &= ~data[0];
- /* set masked bits */
- wbits |= data[0] & data[1];
- devpriv->do_bits = wbits;
- data[1] = wbits;
+ if (comedi_dio_update_state(s, data))
+ outb(s->state, dev->iobase + DAS16M1_DIO);
- outb(devpriv->do_bits, dev->iobase + DAS16M1_DIO);
+ data[1] = s->state;
return insn->n;
}
@@ -649,7 +639,7 @@ static int das16m1_attach(struct comedi_device *dev,
outb(TOTAL_CLEAR, dev->iobase + DAS16M1_8254_FIRST_CNTRL);
/* initialize digital output lines */
- outb(devpriv->do_bits, dev->iobase + DAS16M1_DIO);
+ outb(0, dev->iobase + DAS16M1_DIO);
/* set the interrupt level */
if (dev->irq)
--
1.8.3.2
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