diff options
| -rw-r--r-- | drivers/iio/industrialio-buffer.c | 185 |
1 files changed, 91 insertions, 94 deletions
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index 8bb3e64eaf2c..8cd89eb269c5 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -383,100 +383,6 @@ static int iio_buffer_add_channel_sysfs(struct iio_dev *indio_dev, return ret; } -static const char * const iio_scan_elements_group_name = "scan_elements"; - -int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev) -{ - struct iio_dev_attr *p; - struct attribute **attr; - struct iio_buffer *buffer = indio_dev->buffer; - int ret, i, attrn, attrcount, attrcount_orig = 0; - const struct iio_chan_spec *channels; - - if (!buffer) - return 0; - - if (buffer->attrs) - indio_dev->groups[indio_dev->groupcounter++] = buffer->attrs; - - if (buffer->scan_el_attrs != NULL) { - attr = buffer->scan_el_attrs->attrs; - while (*attr++ != NULL) - attrcount_orig++; - } - attrcount = attrcount_orig; - INIT_LIST_HEAD(&buffer->scan_el_dev_attr_list); - channels = indio_dev->channels; - if (channels) { - /* new magic */ - for (i = 0; i < indio_dev->num_channels; i++) { - if (channels[i].scan_index < 0) - continue; - - /* Establish necessary mask length */ - if (channels[i].scan_index > - (int)indio_dev->masklength - 1) - indio_dev->masklength - = channels[i].scan_index + 1; - - ret = iio_buffer_add_channel_sysfs(indio_dev, - &channels[i]); - if (ret < 0) - goto error_cleanup_dynamic; - attrcount += ret; - if (channels[i].type == IIO_TIMESTAMP) - indio_dev->scan_index_timestamp = - channels[i].scan_index; - } - if (indio_dev->masklength && buffer->scan_mask == NULL) { - buffer->scan_mask = kcalloc(BITS_TO_LONGS(indio_dev->masklength), - sizeof(*buffer->scan_mask), - GFP_KERNEL); - if (buffer->scan_mask == NULL) { - ret = -ENOMEM; - goto error_cleanup_dynamic; - } - } - } - - buffer->scan_el_group.name = iio_scan_elements_group_name; - - buffer->scan_el_group.attrs = kcalloc(attrcount + 1, - sizeof(buffer->scan_el_group.attrs[0]), - GFP_KERNEL); - if (buffer->scan_el_group.attrs == NULL) { - ret = -ENOMEM; - goto error_free_scan_mask; - } - if (buffer->scan_el_attrs) - memcpy(buffer->scan_el_group.attrs, buffer->scan_el_attrs, - sizeof(buffer->scan_el_group.attrs[0])*attrcount_orig); - attrn = attrcount_orig; - - list_for_each_entry(p, &buffer->scan_el_dev_attr_list, l) - buffer->scan_el_group.attrs[attrn++] = &p->dev_attr.attr; - indio_dev->groups[indio_dev->groupcounter++] = &buffer->scan_el_group; - - return 0; - -error_free_scan_mask: - kfree(buffer->scan_mask); -error_cleanup_dynamic: - iio_free_chan_devattr_list(&buffer->scan_el_dev_attr_list); - - return ret; -} - -void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev) -{ - if (!indio_dev->buffer) - return; - - kfree(indio_dev->buffer->scan_mask); - kfree(indio_dev->buffer->scan_el_group.attrs); - iio_free_chan_devattr_list(&indio_dev->buffer->scan_el_dev_attr_list); -} - ssize_t iio_buffer_read_length(struct device *dev, struct device_attribute *attr, char *buf) @@ -855,6 +761,97 @@ done: } EXPORT_SYMBOL(iio_buffer_store_enable); +static const char * const iio_scan_elements_group_name = "scan_elements"; + +int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev) +{ + struct iio_dev_attr *p; + struct attribute **attr; + struct iio_buffer *buffer = indio_dev->buffer; + int ret, i, attrn, attrcount, attrcount_orig = 0; + const struct iio_chan_spec *channels; + + if (!buffer) + return 0; + + if (buffer->scan_el_attrs != NULL) { + attr = buffer->scan_el_attrs->attrs; + while (*attr++ != NULL) + attrcount_orig++; + } + attrcount = attrcount_orig; + INIT_LIST_HEAD(&buffer->scan_el_dev_attr_list); + channels = indio_dev->channels; + if (channels) { + /* new magic */ + for (i = 0; i < indio_dev->num_channels; i++) { + if (channels[i].scan_index < 0) + continue; + + /* Establish necessary mask length */ + if (channels[i].scan_index > + (int)indio_dev->masklength - 1) + indio_dev->masklength + = channels[i].scan_index + 1; + + ret = iio_buffer_add_channel_sysfs(indio_dev, + &channels[i]); + if (ret < 0) + goto error_cleanup_dynamic; + attrcount += ret; + if (channels[i].type == IIO_TIMESTAMP) + indio_dev->scan_index_timestamp = + channels[i].scan_index; + } + if (indio_dev->masklength && buffer->scan_mask == NULL) { + buffer->scan_mask = kcalloc(BITS_TO_LONGS(indio_dev->masklength), + sizeof(*buffer->scan_mask), + GFP_KERNEL); + if (buffer->scan_mask == NULL) { + ret = -ENOMEM; + goto error_cleanup_dynamic; + } + } + } + + buffer->scan_el_group.name = iio_scan_elements_group_name; + + buffer->scan_el_group.attrs = kcalloc(attrcount + 1, + sizeof(buffer->scan_el_group.attrs[0]), + GFP_KERNEL); + if (buffer->scan_el_group.attrs == NULL) { + ret = -ENOMEM; + goto error_free_scan_mask; + } + if (buffer->scan_el_attrs) + memcpy(buffer->scan_el_group.attrs, buffer->scan_el_attrs, + sizeof(buffer->scan_el_group.attrs[0])*attrcount_orig); + attrn = attrcount_orig; + + list_for_each_entry(p, &buffer->scan_el_dev_attr_list, l) + buffer->scan_el_group.attrs[attrn++] = &p->dev_attr.attr; + indio_dev->groups[indio_dev->groupcounter++] = &buffer->scan_el_group; + + return 0; + +error_free_scan_mask: + kfree(buffer->scan_mask); +error_cleanup_dynamic: + iio_free_chan_devattr_list(&buffer->scan_el_dev_attr_list); + + return ret; +} + +void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev) +{ + if (!indio_dev->buffer) + return; + + kfree(indio_dev->buffer->scan_mask); + kfree(indio_dev->buffer->scan_el_group.attrs); + iio_free_chan_devattr_list(&indio_dev->buffer->scan_el_dev_attr_list); +} + /** * iio_validate_scan_mask_onehot() - Validates that exactly one channel is selected * @indio_dev: the iio device |