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staging: comedi: vmk80xx: remove digital input (*insn_read) 

The comedi core can use the (*insn_bits) function to emulate the
(*insn_read) function. Remove the unnecessary (*insn_read) function.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2013-02-05 17:29:13 -07:00 committed by Greg Kroah-Hartman
parent a348b72eae
commit 0f97889c19
1 changed files with 0 additions and 47 deletions
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47
drivers/staging/comedi/drivers/vmk80xx.c
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@ -704,52 +704,6 @@ static int vmk80xx_di_insn_bits(struct comedi_device *dev,
return retval;
}
static int vmk80xx_di_insn_read(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
unsigned int *data)
{
struct vmk80xx_private *devpriv = dev->private;
int chan;
unsigned char *rx_buf;
int reg;
int inp;
int n;
n = rudimentary_check(devpriv, DIR_IN);
if (n)
return n;
down(&devpriv->limit_sem);
chan = CR_CHAN(insn->chanspec);
rx_buf = devpriv->usb_rx_buf;
if (devpriv->model == VMK8061_MODEL) {
reg = VMK8061_DI_REG;
devpriv->usb_tx_buf[0] = VMK8061_CMD_RD_DI;
} else {
reg = VMK8055_DI_REG;
}
for (n = 0; n < insn->n; n++) {
if (vmk80xx_read_packet(devpriv))
break;
if (devpriv->model == VMK8055_MODEL)
inp = (((rx_buf[reg] >> 4) & 0x03) |
((rx_buf[reg] << 2) & 0x04) |
((rx_buf[reg] >> 3) & 0x18));
else
inp = rx_buf[reg];
data[n] = (inp >> chan) & 1;
}
up(&devpriv->limit_sem);
return n;
}
static int vmk80xx_do_insn_bits(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
@ -1150,7 +1104,6 @@ static int vmk80xx_attach_common(struct comedi_device *dev)
s->n_chan = boardinfo->di_nchans;
s->maxdata = 1;
s->range_table = &range_digital;
s->insn_read = vmk80xx_di_insn_read;
s->insn_bits = vmk80xx_di_insn_bits;
/* Digital output subdevice */