The intent is to localize all buffer ops into the industrialio-buffer.c
file, to be able to add support for multiple buffers per IIO device.
We still need to allocate a chardev in __iio_device_register() to be able
to pass event ioctl commands. So, if the IIO device has no buffer, we
create the legacy chardev for the event ioctl() command.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx>
---
drivers/iio/industrialio-core.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 157d95a24faa..c8c074602709 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -1707,6 +1707,15 @@ static int iio_check_unique_scan_index(struct iio_dev *indio_dev)
static const struct iio_buffer_setup_ops noop_ring_setup_ops;
+static const struct file_operations iio_event_fileops = {
+ .release = iio_chrdev_release,
+ .open = iio_chrdev_open,
+ .owner = THIS_MODULE,
+ .llseek = noop_llseek,
+ .unlocked_ioctl = iio_ioctl,
+ .compat_ioctl = compat_ptr_ioctl,
+};
+
int __iio_device_register(struct iio_dev *indio_dev, struct module *this_mod)
{
int ret;
@@ -1757,7 +1766,10 @@ int __iio_device_register(struct iio_dev *indio_dev, struct module *this_mod)
indio_dev->setup_ops == NULL)
indio_dev->setup_ops = &noop_ring_setup_ops;
- cdev_init(&indio_dev->chrdev, &iio_buffer_fileops);
+ if (indio_dev->buffer)
+ cdev_init(&indio_dev->chrdev, &iio_buffer_fileops);
+ else
+ cdev_init(&indio_dev->chrdev, &iio_event_fileops);
indio_dev->chrdev.owner = this_mod;
--
2.17.1
