diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/dt2801.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/dt2801.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/staging/comedi/drivers/dt2801.c b/drivers/staging/comedi/drivers/dt2801.c index 5cce1b5f4484..b85c8366a396 100644 --- a/drivers/staging/comedi/drivers/dt2801.c +++ b/drivers/staging/comedi/drivers/dt2801.c @@ -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); |