From 43a4360ea8f075540cb7c1efc8d643b4261eb901 Mon Sep 17 00:00:00 2001 From: Michael Hennerich Date: Mon, 27 Jun 2011 13:07:09 +0100 Subject: 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 Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/staging/iio/industrialio-trigger.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) (limited to 'drivers/staging/iio/industrialio-trigger.c') 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) -- cgit v1.2.3