iio: buffer-dmaengine: add dev-managed calls for buffer alloc

}

EXPORT_SYMBOL_GPL(iio_dmaengine_buffer_free);

static void __devm_iio_dmaengine_buffer_free(struct device *dev, void *res)

{

	iio_dmaengine_buffer_free(*(struct iio_buffer **)res);

}

/**

 * devm_iio_dmaengine_buffer_alloc() - Resource-managed iio_dmaengine_buffer_alloc()

 * @dev: Parent device for the buffer

 * @channel: DMA channel name, typically "rx".

 *

 * This allocates a new IIO buffer which internally uses the DMAengine framework

 * to perform its transfers. The parent device will be used to request the DMA

 * channel.

 *

 * The buffer will be automatically de-allocated once the device gets destroyed.

 */

struct iio_buffer *devm_iio_dmaengine_buffer_alloc(struct device *dev,

	const char *channel)

{

	struct iio_buffer **bufferp, *buffer;

	bufferp = devres_alloc(__devm_iio_dmaengine_buffer_free,

			       sizeof(*bufferp), GFP_KERNEL);

	if (!bufferp)

		return ERR_PTR(-ENOMEM);

	buffer = iio_dmaengine_buffer_alloc(dev, channel);

	if (IS_ERR(buffer)) {

		devres_free(bufferp);

		return buffer;

	}

	*bufferp = buffer;

	devres_add(dev, bufferp);

	return buffer;

}

EXPORT_SYMBOL_GPL(devm_iio_dmaengine_buffer_alloc);

MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");

MODULE_DESCRIPTION("DMA buffer for the IIO framework");

MODULE_LICENSE("GPL");

	const char *channel);

void iio_dmaengine_buffer_free(struct iio_buffer *buffer);

struct iio_buffer *devm_iio_dmaengine_buffer_alloc(struct device *dev,

						   const char *channel);

#endif