diff options
Diffstat (limited to 'drivers/iio/industrialio-trigger.c')
| -rw-r--r-- | drivers/iio/industrialio-trigger.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c index d31098e0c..570606c2a 100644 --- a/drivers/iio/industrialio-trigger.c +++ b/drivers/iio/industrialio-trigger.c @@ -40,7 +40,14 @@ static DEFINE_MUTEX(iio_trigger_list_lock); /** * iio_trigger_read_name() - retrieve useful identifying name - **/ + * @dev: device associated with the iio_trigger + * @attr: pointer to the device_attribute structure that is + * being processed + * @buf: buffer to print the name into + * + * Return: a negative number on failure or the number of written + * characters on success. + */ static ssize_t iio_trigger_read_name(struct device *dev, struct device_attribute *attr, char *buf) @@ -288,10 +295,17 @@ EXPORT_SYMBOL_GPL(iio_dealloc_pollfunc); /** * iio_trigger_read_current() - trigger consumer sysfs query current trigger + * @dev: device associated with an industrial I/O device + * @attr: pointer to the device_attribute structure that + * is being processed + * @buf: buffer where the current trigger name will be printed into * * For trigger consumers the current_trigger interface allows the trigger * used by the device to be queried. - **/ + * + * Return: a negative number on failure, the number of characters written + * on success or 0 if no trigger is available + */ static ssize_t iio_trigger_read_current(struct device *dev, struct device_attribute *attr, char *buf) @@ -305,11 +319,18 @@ static ssize_t iio_trigger_read_current(struct device *dev, /** * iio_trigger_write_current() - trigger consumer sysfs set current trigger + * @dev: device associated with an industrial I/O device + * @attr: device attribute that is being processed + * @buf: string buffer that holds the name of the trigger + * @len: length of the trigger name held by buf * * For trigger consumers the current_trigger interface allows the trigger * used for this device to be specified at run time based on the trigger's * name. - **/ + * + * Return: negative error code on failure or length of the buffer + * on success + */ static ssize_t iio_trigger_write_current(struct device *dev, struct device_attribute *attr, const char *buf, |