The analog input (*do_cmdtest) in this driver currently validates that the
scan_begin_src is TRIG_FOLLOW or, if the board can_burst, TRIG_TIMER or
TRIG_EXT.
The rest of the driver is coded to assume that the scan_begin_src is always
TRIG_FOLLOW.
Simplify the driver by removing the, unused, TRIG_TIMER and TRIG_EXT options
and validation.
Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/staging/comedi/drivers/das16.c | 34 ++++------------------------------
1 file changed, 4 insertions(+), 30 deletions(-)
diff --git a/drivers/staging/comedi/drivers/das16.c
b/drivers/staging/comedi/drivers/das16.c
index 4608b01..5523278 100644
--- a/drivers/staging/comedi/drivers/das16.c
+++ b/drivers/staging/comedi/drivers/das16.c
@@ -592,11 +592,7 @@ static int das16_cmd_test(struct comedi_device *dev,
struct comedi_subdevice *s,
/* Step 1 : check if triggers are trivially valid */
err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW);
-
- trig_mask = TRIG_FOLLOW;
- if (devpriv->can_burst)
- trig_mask |= TRIG_TIMER | TRIG_EXT;
- err |= cfc_check_trigger_src(&cmd->scan_begin_src, trig_mask);
+ err |= cfc_check_trigger_src(&cmd->scan_begin_src, TRIG_FOLLOW);
trig_mask = TRIG_TIMER | TRIG_EXT;
if (devpriv->can_burst)
@@ -611,35 +607,20 @@ static int das16_cmd_test(struct comedi_device *dev,
struct comedi_subdevice *s,
/* Step 2a : make sure trigger sources are unique */
- err |= cfc_check_trigger_is_unique(cmd->scan_begin_src);
err |= cfc_check_trigger_is_unique(cmd->convert_src);
err |= cfc_check_trigger_is_unique(cmd->stop_src);
/* Step 2b : and mutually compatible */
- /* make sure scan_begin_src and convert_src dont conflict */
- if (cmd->scan_begin_src == TRIG_FOLLOW && cmd->convert_src == TRIG_NOW)
- err |= -EINVAL;
- if (cmd->scan_begin_src != TRIG_FOLLOW && cmd->convert_src != TRIG_NOW)
- err |= -EINVAL;
-
if (err)
return 2;
/* Step 3: check if arguments are trivially valid */
err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
-
- if (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */
- err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
-
+ err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len);
- /* check against maximum frequency */
- if (cmd->scan_begin_src == TRIG_TIMER)
- err |= cfc_check_trigger_arg_min(&cmd->scan_begin_arg,
- board->ai_speed * cmd->chanlist_len);
-
if (cmd->convert_src == TRIG_TIMER)
err |= cfc_check_trigger_arg_min(&cmd->convert_arg,
board->ai_speed);
@@ -652,15 +633,8 @@ static int das16_cmd_test(struct comedi_device *dev,
struct comedi_subdevice *s,
if (err)
return 3;
- /* step 4: fix up arguments */
- if (cmd->scan_begin_src == TRIG_TIMER) {
- arg = cmd->scan_begin_arg;
- i8253_cascade_ns_to_timer(devpriv->clockbase,
- &devpriv->divisor1,
- &devpriv->divisor2,
- &arg, cmd->flags);
- err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, arg);
- }
+ /* Step 4: fix up arguments */
+
if (cmd->convert_src == TRIG_TIMER) {
arg = cmd->convert_arg;
i8253_cascade_ns_to_timer(devpriv->clockbase,
--
2.0.3
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