4 files changed, 8 insertions, 81 deletions

diff --git a/drivers/staging/iio/accel/lis3l02dq_core.c b/drivers/staging/iio/accel/lis3l02dq_core.c
index f5e145caffa9..b78c9c5d5588 100644
--- a/drivers/staging/iio/accel/lis3l02dq_core.c
+++ b/drivers/staging/iio/accel/lis3l02dq_core.c
@@ -716,14 +716,6 @@ static int lis3l02dq_probe(struct spi_device *spi)
 	if (ret)
 		return ret;
 
-	ret = iio_buffer_register(indio_dev,
-				  lis3l02dq_channels,
-				  ARRAY_SIZE(lis3l02dq_channels));
-	if (ret) {
-		dev_err(&spi->dev, "failed to initialize the buffer\n");
-		goto error_unreg_buffer_funcs;
-	}
-
 	if (spi->irq) {
 		ret = request_threaded_irq(st->us->irq,
 					   &lis3l02dq_th,
@@ -732,7 +724,7 @@ static int lis3l02dq_probe(struct spi_device *spi)
 					   "lis3l02dq",
 					   indio_dev);
 		if (ret)
-			goto error_uninitialize_buffer;
+			goto error_unreg_buffer_funcs;
 
 		ret = lis3l02dq_probe_trigger(indio_dev);
 		if (ret)
@@ -756,8 +748,6 @@ error_remove_trigger:
 error_free_interrupt:
 	if (spi->irq)
 		free_irq(st->us->irq, indio_dev);
-error_uninitialize_buffer:
-	iio_buffer_unregister(indio_dev);
 error_unreg_buffer_funcs:
 	lis3l02dq_unconfigure_buffer(indio_dev);
 	return ret;
@@ -804,7 +794,6 @@ static int lis3l02dq_remove(struct spi_device *spi)
 		free_irq(st->us->irq, indio_dev);
 
 	lis3l02dq_remove_trigger(indio_dev);
-	iio_buffer_unregister(indio_dev);
 	lis3l02dq_unconfigure_buffer(indio_dev);
 
 	return 0;
diff --git a/drivers/staging/iio/accel/lis3l02dq_ring.c b/drivers/staging/iio/accel/lis3l02dq_ring.c
index 9efc77b0ebdd..1fd90090a633 100644
--- a/drivers/staging/iio/accel/lis3l02dq_ring.c
+++ b/drivers/staging/iio/accel/lis3l02dq_ring.c
@@ -393,7 +393,7 @@ int lis3l02dq_configure_buffer(struct iio_dev *indio_dev)
 	int ret;
 	struct iio_buffer *buffer;
 
-	buffer = iio_kfifo_allocate(indio_dev);
+	buffer = iio_kfifo_allocate();
 	if (!buffer)
 		return -ENOMEM;
 
diff --git a/drivers/staging/iio/accel/sca3000_core.c b/drivers/staging/iio/accel/sca3000_core.c
index e4e56391487a..31fb2182c198 100644
--- a/drivers/staging/iio/accel/sca3000_core.c
+++ b/drivers/staging/iio/accel/sca3000_core.c
@@ -223,33 +223,6 @@ error_ret:
 	return ret;
 }
 
-#ifdef SCA3000_DEBUG
-/**
- * sca3000_check_status() check the status register
- *
- * Only used for debugging purposes
- **/
-static int sca3000_check_status(struct device *dev)
-{
-	int ret;
-	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
-	struct sca3000_state *st = iio_priv(indio_dev);
-
-	mutex_lock(&st->lock);
-	ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_STATUS, 1);
-	if (ret < 0)
-		goto error_ret;
-	if (st->rx[0] & SCA3000_EEPROM_CS_ERROR)
-		dev_err(dev, "eeprom error\n");
-	if (st->rx[0] & SCA3000_SPI_FRAME_ERROR)
-		dev_err(dev, "Previous SPI Frame was corrupt\n");
-
-error_ret:
-	mutex_unlock(&st->lock);
-	return ret;
-}
-#endif /* SCA3000_DEBUG */
-
 /**
  * sca3000_show_rev() - sysfs interface to read the chip revision number
  **/
@@ -459,6 +432,8 @@ static const struct iio_chan_spec sca3000_channels_with_temp[] = {
 		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
 		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |
 			BIT(IIO_CHAN_INFO_OFFSET),
+		/* No buffer support */
+		.scan_index = -1,
 	},
 };
 
@@ -1154,17 +1129,6 @@ static int sca3000_probe(struct spi_device *spi)
 	if (ret < 0)
 		return ret;
 
-	ret = iio_buffer_register(indio_dev,
-				  sca3000_channels,
-				  ARRAY_SIZE(sca3000_channels));
-	if (ret < 0)
-		goto error_unregister_dev;
-	if (indio_dev->buffer) {
-		iio_scan_mask_set(indio_dev, indio_dev->buffer, 0);
-		iio_scan_mask_set(indio_dev, indio_dev->buffer, 1);
-		iio_scan_mask_set(indio_dev, indio_dev->buffer, 2);
-	}
-
 	if (spi->irq) {
 		ret = request_threaded_irq(spi->irq,
 					   NULL,
@@ -1173,7 +1137,7 @@ static int sca3000_probe(struct spi_device *spi)
 					   "sca3000",
 					   indio_dev);
 		if (ret)
-			goto error_unregister_ring;
+			goto error_unregister_dev;
 	}
 	sca3000_register_ring_funcs(indio_dev);
 	ret = sca3000_clean_setup(st);
@@ -1184,8 +1148,6 @@ static int sca3000_probe(struct spi_device *spi)
 error_free_irq:
 	if (spi->irq)
 		free_irq(spi->irq, indio_dev);
-error_unregister_ring:
-	iio_buffer_unregister(indio_dev);
 error_unregister_dev:
 	iio_device_unregister(indio_dev);
 	return ret;
@@ -1219,7 +1181,6 @@ static int sca3000_remove(struct spi_device *spi)
 	if (spi->irq)
 		free_irq(spi->irq, indio_dev);
 	iio_device_unregister(indio_dev);
-	iio_buffer_unregister(indio_dev);
 	sca3000_unconfigure_ring(indio_dev);
 
 	return 0;
diff --git a/drivers/staging/iio/accel/sca3000_ring.c b/drivers/staging/iio/accel/sca3000_ring.c
index 157827651bfa..f76a26885808 100644
--- a/drivers/staging/iio/accel/sca3000_ring.c
+++ b/drivers/staging/iio/accel/sca3000_ring.c
@@ -129,26 +129,11 @@ error_ret:
 	return ret ? ret : num_read;
 }
 
-/* This is only valid with all 3 elements enabled */
-static int sca3000_ring_get_length(struct iio_buffer *r)
-{
-	return 64;
-}
-
-/* only valid if resolution is kept at 11bits */
-static int sca3000_ring_get_bytes_per_datum(struct iio_buffer *r)
-{
-	return 6;
-}
-
 static bool sca3000_ring_buf_data_available(struct iio_buffer *r)
 {
 	return r->stufftoread;
 }
 
-static IIO_BUFFER_ENABLE_ATTR;
-static IIO_BUFFER_LENGTH_ATTR;
-
 /**
  * sca3000_query_ring_int() is the hardware ring status interrupt enabled
  **/
@@ -238,20 +223,13 @@ static IIO_DEVICE_ATTR(in_accel_scale,
  * only apply to the ring buffer.  At all times full rate and accuracy
  * is available via direct reading from registers.
  */
-static struct attribute *sca3000_ring_attributes[] = {
-	&dev_attr_length.attr,
-	&dev_attr_enable.attr,
+static const struct attribute *sca3000_ring_attributes[] = {
 	&iio_dev_attr_50_percent.dev_attr.attr,
 	&iio_dev_attr_75_percent.dev_attr.attr,
 	&iio_dev_attr_in_accel_scale.dev_attr.attr,
 	NULL,
 };
 
-static struct attribute_group sca3000_ring_attr = {
-	.attrs = sca3000_ring_attributes,
-	.name = "buffer",
-};
-
 static struct iio_buffer *sca3000_rb_allocate(struct iio_dev *indio_dev)
 {
 	struct iio_buffer *buf;
@@ -264,7 +242,8 @@ static struct iio_buffer *sca3000_rb_allocate(struct iio_dev *indio_dev)
 	ring->private = indio_dev;
 	buf = &ring->buf;
 	buf->stufftoread = 0;
-	buf->attrs = &sca3000_ring_attr;
+	buf->length = 64;
+	buf->attrs = sca3000_ring_attributes;
 	iio_buffer_init(buf);
 
 	return buf;
@@ -277,8 +256,6 @@ static void sca3000_ring_release(struct iio_buffer *r)
 
 static const struct iio_buffer_access_funcs sca3000_ring_access_funcs = {
 	.read_first_n = &sca3000_read_first_n_hw_rb,
-	.get_length = &sca3000_ring_get_length,
-	.get_bytes_per_datum = &sca3000_ring_get_bytes_per_datum,
 	.data_available = sca3000_ring_buf_data_available,
 	.release = sca3000_ring_release,
 };