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iio: triggered-buffer: extend support to configure output buffers

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Now that output (kfifo) buffers are supported, we need to extend the
{devm_}iio_triggered_buffer_setup_ext() parameter list to take a direction
parameter.

This allows us to attach an output triggered buffer to a DAC device.
Unfortunately it's a bit difficult to add another macro to avoid changing 5
drivers where {devm_}iio_triggered_buffer_setup_ext() is used.
Well, it's doable, but may not be worth the trouble vs just updating all
these 5 drivers.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Mihail Chindris <mihail.chindris@analog.com>
Link: https://lore.kernel.org/r/20211007080035.2531-4-mihail.chindris@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Alexandru Ardelean
2021-10-07 08:00:32 +00:00
committed by Jonathan Cameron
parent 1546d6718d
commit c02cd5c19c
6 changed files with 22 additions and 8 deletions
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drivers/iio/buffer/industrialio-triggered-buffer.c
+6 -2
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@@ -19,6 +19,7 @@
* @indio_dev: IIO device structure
* @h: Function which will be used as pollfunc top half
* @thread: Function which will be used as pollfunc bottom half
* @direction: Direction of the data stream (in/out).
* @setup_ops: Buffer setup functions to use for this device.
* If NULL the default setup functions for triggered
* buffers will be used.
@@ -38,6 +39,7 @@
int iio_triggered_buffer_setup_ext(struct iio_dev *indio_dev,
irqreturn_t (*h)(int irq, void *p),
irqreturn_t (*thread)(int irq, void *p),
enum iio_buffer_direction direction,
const struct iio_buffer_setup_ops *setup_ops,
const struct attribute **buffer_attrs)
{
@@ -68,6 +70,7 @@ int iio_triggered_buffer_setup_ext(struct iio_dev *indio_dev,
/* Flag that polled ring buffering is possible */
indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
buffer->direction = direction;
buffer->attrs = buffer_attrs;
ret = iio_device_attach_buffer(indio_dev, buffer);
@@ -105,13 +108,14 @@ int devm_iio_triggered_buffer_setup_ext(struct device *dev,
struct iio_dev *indio_dev,
irqreturn_t (*h)(int irq, void *p),
irqreturn_t (*thread)(int irq, void *p),
enum iio_buffer_direction direction,
const struct iio_buffer_setup_ops *ops,
const struct attribute **buffer_attrs)
{
int ret;
ret = iio_triggered_buffer_setup_ext(indio_dev, h, thread, ops,
buffer_attrs);
ret = iio_triggered_buffer_setup_ext(indio_dev, h, thread, direction,
ops, buffer_attrs);
if (ret)
return ret;