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staging: comedi: me4000: fix ai_write_chanlist() 

Rename this function so it has namespace associated with the driver.

The last entry of the chanlist needs the ME4000_AI_LIST_LAST_ENTRY bit
set to end the list. Fix the function and tidy if up a bit.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2015-08-05 10:44:52 -07:00 committed by Greg Kroah-Hartman
parent 245bd46244
commit 518c5b64f6
1 changed files with 12 additions and 11 deletions
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23
drivers/staging/comedi/drivers/me4000.c
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@ -652,25 +652,26 @@ static void ai_write_timer(struct comedi_device *dev,
outl(chan_ticks - 1, dev->iobase + ME4000_AI_CHAN_TIMER_REG);
}
static int ai_write_chanlist(struct comedi_device *dev,
struct comedi_subdevice *s, struct comedi_cmd *cmd)
static int me4000_ai_write_chanlist(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_cmd *cmd)
{
unsigned int entry;
unsigned int chan;
unsigned int rang;
unsigned int aref;
int i;
for (i = 0; i < cmd->chanlist_len; i++) {
chan = CR_CHAN(cmd->chanlist[i]);
rang = CR_RANGE(cmd->chanlist[i]);
aref = CR_AREF(cmd->chanlist[i]);
unsigned int chan = CR_CHAN(cmd->chanlist[i]);
unsigned int range = CR_RANGE(cmd->chanlist[i]);
unsigned int aref = CR_AREF(cmd->chanlist[i]);
unsigned int entry;
entry = chan | ME4000_AI_LIST_RANGE(rang);
entry = chan | ME4000_AI_LIST_RANGE(range);
if (aref == AREF_DIFF)
entry |= ME4000_AI_LIST_INPUT_DIFFERENTIAL;
if (i == (cmd->chanlist_len - 1))
entry |= ME4000_AI_LIST_LAST_ENTRY;
outl(entry, dev->iobase + ME4000_AI_CHANNEL_LIST_REG);
}
@ -738,7 +739,7 @@ static int ai_prepare(struct comedi_device *dev,
outl(tmp, dev->iobase + ME4000_AI_CTRL_REG);
/* Write the channel list */
ai_write_chanlist(dev, s, cmd);
me4000_ai_write_chanlist(dev, s, cmd);
return 0;
}