diff options
Diffstat (limited to 'drivers/iio/industrialio-buffer.c')
| -rw-r--r-- | drivers/iio/industrialio-buffer.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index d2b465140a6b..6184c100a94a 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -169,7 +169,7 @@ ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf, * Return: (POLLIN | POLLRDNORM) if data is available for reading * or 0 for other cases */ -unsigned int iio_buffer_poll(struct file *filp, +__poll_t iio_buffer_poll(struct file *filp, struct poll_table_struct *wait) { struct iio_dev *indio_dev = filp->private_data; @@ -1198,6 +1198,18 @@ out: return ret ? ret : len; } +static ssize_t iio_dma_show_data_available(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + size_t bytes; + + bytes = iio_buffer_data_available(indio_dev->buffer); + + return sprintf(buf, "%zu\n", bytes); +} + static DEVICE_ATTR(length, S_IRUGO | S_IWUSR, iio_buffer_read_length, iio_buffer_write_length); static struct device_attribute dev_attr_length_ro = __ATTR(length, @@ -1208,11 +1220,14 @@ static DEVICE_ATTR(watermark, S_IRUGO | S_IWUSR, iio_buffer_show_watermark, iio_buffer_store_watermark); static struct device_attribute dev_attr_watermark_ro = __ATTR(watermark, S_IRUGO, iio_buffer_show_watermark, NULL); +static DEVICE_ATTR(data_available, S_IRUGO, + iio_dma_show_data_available, NULL); static struct attribute *iio_buffer_attrs[] = { &dev_attr_length.attr, &dev_attr_enable.attr, &dev_attr_watermark.attr, + &dev_attr_data_available.attr, }; int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev) |