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staging: comedi: dt2801: do INSN_CONFIG properly for DIO subdevice.

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Handle INSN_CONFIG_DIO_INPUT, INSN_CONFIG_DIO_OUTPUT and
INSN_CONFIG_DIO_QUERY in data[0].

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ian Abbott 2012-01-09 15:48:35 +00:00 committed by Greg Kroah-Hartman
parent 586b983927
commit 8383def69b
1 changed files with 10 additions and 2 deletions
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12
drivers/staging/comedi/drivers/dt2801.c
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@ -720,12 +720,20 @@ static int dt2801_dio_insn_config(struct comedi_device *dev,
which = 1;
/* configure */
if (data[0]) {
switch (data[0]) {
case INSN_CONFIG_DIO_OUTPUT:
s->io_bits = 0xff;
dt2801_writecmd(dev, DT_C_SET_DIGOUT);
} else {
break;
case INSN_CONFIG_DIO_INPUT:
s->io_bits = 0;
dt2801_writecmd(dev, DT_C_SET_DIGIN);
break;
case INSN_CONFIG_DIO_QUERY:
data[1] = s->io_bits ? COMEDI_OUTPUT : COMEDI_INPUT;
return insn->n;
default:
return -EINVAL;
}
dt2801_writedata(dev, which);