mirror of https://gitee.com/openkylin/linux.git
iio: buffer: Move iio_buffer_alloc_sysfs and iio_buffer_free_sysfs
The next patch will introduce new dependencies in iio_buffer_alloc_sysfs() to functions which are currently defined after iio_buffer_alloc_sysfs(). To avoid forward declarations move both iio_buffer_alloc_sysfs() and iio_buffer_free_sysfs() after those function. This is split into two patches one moving the functions and one adding the dependencies to make review of the actual changes easier. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Lars-Peter Clausen
Jonathan Cameron
parent
616dde2a1e
commit
d967cb6bd4
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@ -383,100 +383,6 @@ static int iio_buffer_add_channel_sysfs(struct iio_dev *indio_dev,
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return ret;
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}
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static const char * const iio_scan_elements_group_name = "scan_elements";
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int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
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{
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struct iio_dev_attr *p;
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struct attribute **attr;
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struct iio_buffer *buffer = indio_dev->buffer;
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int ret, i, attrn, attrcount, attrcount_orig = 0;
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const struct iio_chan_spec *channels;
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if (!buffer)
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return 0;
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if (buffer->attrs)
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indio_dev->groups[indio_dev->groupcounter++] = buffer->attrs;
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if (buffer->scan_el_attrs != NULL) {
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attr = buffer->scan_el_attrs->attrs;
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while (*attr++ != NULL)
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attrcount_orig++;
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}
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attrcount = attrcount_orig;
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INIT_LIST_HEAD(&buffer->scan_el_dev_attr_list);
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channels = indio_dev->channels;
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if (channels) {
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/* new magic */
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for (i = 0; i < indio_dev->num_channels; i++) {
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if (channels[i].scan_index < 0)
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continue;
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/* Establish necessary mask length */
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if (channels[i].scan_index >
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(int)indio_dev->masklength - 1)
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indio_dev->masklength
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= channels[i].scan_index + 1;
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ret = iio_buffer_add_channel_sysfs(indio_dev,
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&channels[i]);
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if (ret < 0)
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goto error_cleanup_dynamic;
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attrcount += ret;
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if (channels[i].type == IIO_TIMESTAMP)
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indio_dev->scan_index_timestamp =
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channels[i].scan_index;
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}
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if (indio_dev->masklength && buffer->scan_mask == NULL) {
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buffer->scan_mask = kcalloc(BITS_TO_LONGS(indio_dev->masklength),
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sizeof(*buffer->scan_mask),
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GFP_KERNEL);
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if (buffer->scan_mask == NULL) {
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ret = -ENOMEM;
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goto error_cleanup_dynamic;
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}
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}
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}
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buffer->scan_el_group.name = iio_scan_elements_group_name;
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buffer->scan_el_group.attrs = kcalloc(attrcount + 1,
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sizeof(buffer->scan_el_group.attrs[0]),
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GFP_KERNEL);
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if (buffer->scan_el_group.attrs == NULL) {
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ret = -ENOMEM;
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goto error_free_scan_mask;
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}
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if (buffer->scan_el_attrs)
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memcpy(buffer->scan_el_group.attrs, buffer->scan_el_attrs,
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sizeof(buffer->scan_el_group.attrs[0])*attrcount_orig);
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attrn = attrcount_orig;
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list_for_each_entry(p, &buffer->scan_el_dev_attr_list, l)
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buffer->scan_el_group.attrs[attrn++] = &p->dev_attr.attr;
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indio_dev->groups[indio_dev->groupcounter++] = &buffer->scan_el_group;
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return 0;
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error_free_scan_mask:
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kfree(buffer->scan_mask);
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error_cleanup_dynamic:
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iio_free_chan_devattr_list(&buffer->scan_el_dev_attr_list);
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return ret;
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}
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void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev)
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{
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if (!indio_dev->buffer)
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return;
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kfree(indio_dev->buffer->scan_mask);
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kfree(indio_dev->buffer->scan_el_group.attrs);
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iio_free_chan_devattr_list(&indio_dev->buffer->scan_el_dev_attr_list);
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}
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ssize_t iio_buffer_read_length(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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@ -855,6 +761,97 @@ ssize_t iio_buffer_store_enable(struct device *dev,
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}
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EXPORT_SYMBOL(iio_buffer_store_enable);
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static const char * const iio_scan_elements_group_name = "scan_elements";
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int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
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{
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struct iio_dev_attr *p;
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struct attribute **attr;
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struct iio_buffer *buffer = indio_dev->buffer;
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int ret, i, attrn, attrcount, attrcount_orig = 0;
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const struct iio_chan_spec *channels;
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if (!buffer)
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return 0;
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if (buffer->scan_el_attrs != NULL) {
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attr = buffer->scan_el_attrs->attrs;
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while (*attr++ != NULL)
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attrcount_orig++;
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}
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attrcount = attrcount_orig;
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INIT_LIST_HEAD(&buffer->scan_el_dev_attr_list);
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channels = indio_dev->channels;
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if (channels) {
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/* new magic */
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for (i = 0; i < indio_dev->num_channels; i++) {
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if (channels[i].scan_index < 0)
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continue;
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/* Establish necessary mask length */
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if (channels[i].scan_index >
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(int)indio_dev->masklength - 1)
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indio_dev->masklength
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= channels[i].scan_index + 1;
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ret = iio_buffer_add_channel_sysfs(indio_dev,
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&channels[i]);
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if (ret < 0)
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goto error_cleanup_dynamic;
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attrcount += ret;
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if (channels[i].type == IIO_TIMESTAMP)
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indio_dev->scan_index_timestamp =
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channels[i].scan_index;
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}
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if (indio_dev->masklength && buffer->scan_mask == NULL) {
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buffer->scan_mask = kcalloc(BITS_TO_LONGS(indio_dev->masklength),
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sizeof(*buffer->scan_mask),
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GFP_KERNEL);
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if (buffer->scan_mask == NULL) {
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ret = -ENOMEM;
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goto error_cleanup_dynamic;
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}
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}
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}
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buffer->scan_el_group.name = iio_scan_elements_group_name;
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buffer->scan_el_group.attrs = kcalloc(attrcount + 1,
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sizeof(buffer->scan_el_group.attrs[0]),
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GFP_KERNEL);
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if (buffer->scan_el_group.attrs == NULL) {
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ret = -ENOMEM;
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goto error_free_scan_mask;
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}
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if (buffer->scan_el_attrs)
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memcpy(buffer->scan_el_group.attrs, buffer->scan_el_attrs,
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sizeof(buffer->scan_el_group.attrs[0])*attrcount_orig);
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attrn = attrcount_orig;
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list_for_each_entry(p, &buffer->scan_el_dev_attr_list, l)
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buffer->scan_el_group.attrs[attrn++] = &p->dev_attr.attr;
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indio_dev->groups[indio_dev->groupcounter++] = &buffer->scan_el_group;
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return 0;
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error_free_scan_mask:
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kfree(buffer->scan_mask);
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error_cleanup_dynamic:
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iio_free_chan_devattr_list(&buffer->scan_el_dev_attr_list);
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return ret;
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}
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void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev)
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{
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if (!indio_dev->buffer)
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return;
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kfree(indio_dev->buffer->scan_mask);
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kfree(indio_dev->buffer->scan_el_group.attrs);
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iio_free_chan_devattr_list(&indio_dev->buffer->scan_el_dev_attr_list);
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}
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/**
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* iio_validate_scan_mask_onehot() - Validates that exactly one channel is selected
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* @indio_dev: the iio device
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