summaryrefslogtreecommitdiff
path: root/drivers/iio/industrialio-trigger.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/iio/industrialio-trigger.c')
-rw-r--r--drivers/iio/industrialio-trigger.c40
1 files changed, 28 insertions, 12 deletions
diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c
index bf5e70a..766fab2 100644
--- a/drivers/iio/industrialio-trigger.c
+++ b/drivers/iio/industrialio-trigger.c
@@ -55,15 +55,7 @@ static struct attribute *iio_trig_dev_attrs[] = {
&dev_attr_name.attr,
NULL,
};
-
-static struct attribute_group iio_trig_attr_group = {
- .attrs = iio_trig_dev_attrs,
-};
-
-static const struct attribute_group *iio_trig_attr_groups[] = {
- &iio_trig_attr_group,
- NULL
-};
+ATTRIBUTE_GROUPS(iio_trig_dev);
int iio_trigger_register(struct iio_trigger *trig_info)
{
@@ -318,7 +310,7 @@ static ssize_t iio_trigger_read_current(struct device *dev,
* iio_trigger_write_current() - trigger consumer sysfs set current trigger
*
* For trigger consumers the current_trigger interface allows the trigger
- * used for this device to be specified at run time based on the triggers
+ * used for this device to be specified at run time based on the trigger's
* name.
**/
static ssize_t iio_trigger_write_current(struct device *dev,
@@ -356,7 +348,7 @@ static ssize_t iio_trigger_write_current(struct device *dev,
indio_dev->trig = trig;
- if (oldtrig && indio_dev->trig != oldtrig)
+ if (oldtrig)
iio_trigger_put(oldtrig);
if (indio_dev->trig)
iio_trigger_get(indio_dev->trig);
@@ -403,7 +395,7 @@ static void iio_trig_release(struct device *device)
static struct device_type iio_trig_type = {
.release = iio_trig_release,
- .groups = iio_trig_attr_groups,
+ .groups = iio_trig_dev_groups,
};
static void iio_trig_subirqmask(struct irq_data *d)
@@ -506,6 +498,23 @@ static int devm_iio_trigger_match(struct device *dev, void *res, void *data)
return *r == data;
}
+/**
+ * devm_iio_trigger_alloc - Resource-managed iio_trigger_alloc()
+ * @dev: Device to allocate iio_trigger for
+ * @fmt: trigger name format. If it includes format
+ * specifiers, the additional arguments following
+ * format are formatted and inserted in the resulting
+ * string replacing their respective specifiers.
+ *
+ * Managed iio_trigger_alloc. iio_trigger allocated with this function is
+ * automatically freed on driver detach.
+ *
+ * If an iio_trigger allocated with this function needs to be freed separately,
+ * devm_iio_trigger_free() must be used.
+ *
+ * RETURNS:
+ * Pointer to allocated iio_trigger on success, NULL on failure.
+ */
struct iio_trigger *devm_iio_trigger_alloc(struct device *dev,
const char *fmt, ...)
{
@@ -532,6 +541,13 @@ struct iio_trigger *devm_iio_trigger_alloc(struct device *dev,
}
EXPORT_SYMBOL_GPL(devm_iio_trigger_alloc);
+/**
+ * devm_iio_trigger_free - Resource-managed iio_trigger_free()
+ * @dev: Device this iio_dev belongs to
+ * @iio_trig: the iio_trigger associated with the device
+ *
+ * Free iio_trigger allocated with devm_iio_trigger_alloc().
+ */
void devm_iio_trigger_free(struct device *dev, struct iio_trigger *iio_trig)
{
int rc;