iio: inkern: drop devm_iio_channel_release{_all} API calls

It's unused so far, so it can be removed. Also makes sense to remove it
to discourage weird uses of this call during review.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/driver-api/driver-model/devres.rst

@@ -291,9 +291,7 @@ IIO
   devm_iio_trigger_alloc()
   devm_iio_trigger_register()
   devm_iio_channel_get()
-  devm_iio_channel_release()
   devm_iio_channel_get_all()
-  devm_iio_channel_release_all()
 
 INPUT
   devm_input_allocate_device()

drivers/iio/inkern.c

@@ -360,18 +360,6 @@ static void devm_iio_channel_free(struct device *dev, void *res)
 	iio_channel_release(channel);
 }
 
-static int devm_iio_channel_match(struct device *dev, void *res, void *data)
-{
-	struct iio_channel **r = res;
-
-	if (!r || !*r) {
-		WARN_ON(!r || !*r);
-		return 0;
-	}
-
-	return *r == data;
-}
-
 struct iio_channel *devm_iio_channel_get(struct device *dev,
 					 const char *channel_name)
 {
@@ -394,13 +382,6 @@ struct iio_channel *devm_iio_channel_get(struct device *dev,
 }
 EXPORT_SYMBOL_GPL(devm_iio_channel_get);
 
-void devm_iio_channel_release(struct device *dev, struct iio_channel *channel)
-{
-	WARN_ON(devres_release(dev, devm_iio_channel_free,
-			       devm_iio_channel_match, channel));
-}
-EXPORT_SYMBOL_GPL(devm_iio_channel_release);
-
 struct iio_channel *iio_channel_get_all(struct device *dev)
 {
 	const char *name;
@@ -514,14 +495,6 @@ struct iio_channel *devm_iio_channel_get_all(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(devm_iio_channel_get_all);
 
-void devm_iio_channel_release_all(struct device *dev,
-				  struct iio_channel *channels)
-{
-	WARN_ON(devres_release(dev, devm_iio_channel_free_all,
-			       devm_iio_channel_match, channels));
-}
-EXPORT_SYMBOL_GPL(devm_iio_channel_release_all);
-
 static int iio_channel_read(struct iio_channel *chan, int *val, int *val2,
 	enum iio_chan_info_enum info)
 {

include/linux/iio/consumer.h

@@ -63,15 +63,6 @@ void iio_channel_release(struct iio_channel *chan);
  */
 struct iio_channel *devm_iio_channel_get(struct device *dev,
 					 const char *consumer_channel);
-/**
- * devm_iio_channel_release() - Resource managed version of
- *				iio_channel_release().
- * @dev:		Pointer to consumer device for which resource
- *			is allocared.
- * @chan:		The channel to be released.
- */
-void devm_iio_channel_release(struct device *dev, struct iio_channel *chan);
-
 /**
  * iio_channel_get_all() - get all channels associated with a client
  * @dev:		Pointer to consumer device.
@@ -106,15 +97,6 @@ void iio_channel_release_all(struct iio_channel *chan);
  */
 struct iio_channel *devm_iio_channel_get_all(struct device *dev);
 
-/**
- * devm_iio_channel_release_all() - Resource managed version of
- *				    iio_channel_release_all().
- * @dev:		Pointer to consumer device for which resource
- *			is allocared.
- * @chan:		Array channel to be released.
- */
-void devm_iio_channel_release_all(struct device *dev, struct iio_channel *chan);
-
 struct iio_cb_buffer;
 /**
  * iio_channel_get_all_cb() - register callback for triggered capture