diff options
| author | Michael Hennerich <michael.hennerich@analog.com> | 2011-06-27 13:07:09 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-06-28 14:39:33 -0700 |
| commit | 43a4360ea8f075540cb7c1efc8d643b4261eb901 (patch) | |
| tree | e380d8c5563b32f13b7c7b06a224c32998a199d3 /drivers/staging/iio/industrialio-trigger.c | |
| parent | 03e1672a70be991a9e84d67b2d2143313938e1a8 (diff) | |
iio: trigger: Add filter callback
Allow devices to reject triggers and vice versa.
Changes since V1:
Added kernel-doc
Moved callback into iio_info
Changed function naming
Revised return value passing
Add forward declaration to avoid warnings
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/iio/industrialio-trigger.c')
| -rw-r--r-- | drivers/staging/iio/industrialio-trigger.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/staging/iio/industrialio-trigger.c b/drivers/staging/iio/industrialio-trigger.c index d504aa251ce..90ca2df23ea 100644 --- a/drivers/staging/iio/industrialio-trigger.c +++ b/drivers/staging/iio/industrialio-trigger.c @@ -340,6 +340,9 @@ static ssize_t iio_trigger_write_current(struct device *dev, { struct iio_dev *dev_info = dev_get_drvdata(dev); struct iio_trigger *oldtrig = dev_info->trig; + struct iio_trigger *trig; + int ret; + mutex_lock(&dev_info->mlock); if (dev_info->currentmode == INDIO_RING_TRIGGERED) { mutex_unlock(&dev_info->mlock); @@ -347,7 +350,22 @@ static ssize_t iio_trigger_write_current(struct device *dev, } mutex_unlock(&dev_info->mlock); - dev_info->trig = iio_trigger_find_by_name(buf, len); + trig = iio_trigger_find_by_name(buf, len); + + if (trig && dev_info->info->validate_trigger) { + ret = dev_info->info->validate_trigger(dev_info, trig); + if (ret) + return ret; + } + + if (trig && trig->validate_device) { + ret = trig->validate_device(trig, dev_info); + if (ret) + return ret; + } + + dev_info->trig = trig; + if (oldtrig && dev_info->trig != oldtrig) iio_put_trigger(oldtrig); if (dev_info->trig) |