@@ -850,3 +850,43 @@ int iio_write_channel_raw(struct iio_channel *chan, int val)
return ret;
}
EXPORT_SYMBOL_GPL(iio_write_channel_raw);
+
+int iio_read_channel_ext_info(struct iio_channel *chan,
+ const char *attr, char *buf)
+{
+ const struct iio_chan_spec_ext_info *ext_info;
+
+ if (!chan->channel->ext_info)
+ return -EINVAL;
+
+ for (ext_info = chan->channel->ext_info; ext_info->name; ++ext_info) {
+ if (strcmp(attr, ext_info->name))
+ continue;
+
+ return ext_info->read(chan->indio_dev, ext_info->private,
+ chan->channel, buf);
+ }
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(iio_read_channel_ext_info);
+
+int iio_write_channel_ext_info(struct iio_channel *chan,
+ const char *attr, const char *buf, size_t len)
+{
+ const struct iio_chan_spec_ext_info *ext_info;
+
+ if (!chan->channel->ext_info)
+ return -EINVAL;
+
+ for (ext_info = chan->channel->ext_info; ext_info->name; ++ext_info) {
+ if (strcmp(attr, ext_info->name))
+ continue;
+
+ return ext_info->write(chan->indio_dev, ext_info->private,
+ chan->channel, buf, len);
+ }
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(iio_write_channel_ext_info);
@@ -299,4 +299,9 @@ int iio_read_channel_scale(struct iio_channel *chan, int *val,
int iio_convert_raw_to_processed(struct iio_channel *chan, int raw,
int *processed, unsigned int scale);
+int iio_read_channel_ext_info(struct iio_channel *chan,
+ const char *attr, char *buf);
+int iio_write_channel_ext_info(struct iio_channel *chan,
+ const char *attr, const char *buf, size_t len);
+
#endif