diff options
Diffstat (limited to 'drivers/iio/industrialio-event.c')
| -rw-r--r-- | drivers/iio/industrialio-event.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c index 99ba657b8568..7e532117ac55 100644 --- a/drivers/iio/industrialio-event.c +++ b/drivers/iio/industrialio-event.c @@ -31,6 +31,7 @@ * @flags: file operations related flags including busy flag. * @group: event interface sysfs attribute group * @read_lock: lock to protect kfifo read operations + * @ioctl_handler: handler for event ioctl() calls */ struct iio_event_interface { wait_queue_head_t wait; @@ -40,6 +41,7 @@ struct iio_event_interface { unsigned long flags; struct attribute_group group; struct mutex read_lock; + struct iio_ioctl_handler ioctl_handler; }; bool iio_event_enabled(const struct iio_event_interface *ev_int) @@ -187,7 +189,7 @@ static const struct file_operations iio_event_chrdev_fileops = { .llseek = noop_llseek, }; -int iio_event_getfd(struct iio_dev *indio_dev) +static int iio_event_getfd(struct iio_dev *indio_dev) { struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev); struct iio_event_interface *ev_int = iio_dev_opaque->event_interface; @@ -473,6 +475,24 @@ static void iio_setup_ev_int(struct iio_event_interface *ev_int) mutex_init(&ev_int->read_lock); } +static long iio_event_ioctl(struct iio_dev *indio_dev, struct file *filp, + unsigned int cmd, unsigned long arg) +{ + int __user *ip = (int __user *)arg; + int fd; + + if (cmd == IIO_GET_EVENT_FD_IOCTL) { + fd = iio_event_getfd(indio_dev); + if (fd < 0) + return fd; + if (copy_to_user(ip, &fd, sizeof(fd))) + return -EFAULT; + return 0; + } + + return IIO_IOCTL_UNHANDLED; +} + static const char *iio_event_group_name = "events"; int iio_device_register_eventset(struct iio_dev *indio_dev) { @@ -526,6 +546,10 @@ int iio_device_register_eventset(struct iio_dev *indio_dev) ev_int->group.attrs[attrn++] = &p->dev_attr.attr; indio_dev->groups[indio_dev->groupcounter++] = &ev_int->group; + ev_int->ioctl_handler.ioctl = iio_event_ioctl; + iio_device_ioctl_handler_register(&iio_dev_opaque->indio_dev, + &ev_int->ioctl_handler); + return 0; error_free_setup_event_lines: @@ -558,6 +582,8 @@ void iio_device_unregister_eventset(struct iio_dev *indio_dev) if (ev_int == NULL) return; + + iio_device_ioctl_handler_unregister(&ev_int->ioctl_handler); iio_free_chan_devattr_list(&ev_int->dev_attr_list); kfree(ev_int->group.attrs); kfree(ev_int); |