[PATCH v6 3/6] iio: triggered-buffer: extend support to configure output buffers
From: Mihail Chindris
Date: Thu Oct 07 2021 - 04:02:18 EST
From: Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx>
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@xxxxxxxxxx>
Signed-off-by: Mihail Chindris <mihail.chindris@xxxxxxxxxx>
---
drivers/iio/accel/adxl372.c | 1 +
drivers/iio/accel/bmc150-accel-core.c | 1 +
drivers/iio/adc/at91-sama5d2_adc.c | 4 ++--
drivers/iio/buffer/industrialio-triggered-buffer.c | 8 ++++++--
.../iio/common/cros_ec_sensors/cros_ec_sensors_core.c | 5 +++--
drivers/iio/common/hid-sensors/hid-sensor-trigger.c | 5 +++--
include/linux/iio/triggered_buffer.h | 11 +++++++++--
7 files changed, 25 insertions(+), 10 deletions(-)
diff --git a/drivers/iio/accel/adxl372.c b/drivers/iio/accel/adxl372.c
index fc9592407717..758952584f8c 100644
--- a/drivers/iio/accel/adxl372.c
+++ b/drivers/iio/accel/adxl372.c
@@ -1214,6 +1214,7 @@ int adxl372_probe(struct device *dev, struct regmap *regmap,
ret = devm_iio_triggered_buffer_setup_ext(dev,
indio_dev, NULL,
adxl372_trigger_handler,
+ IIO_BUFFER_DIRECTION_IN,
&adxl372_buffer_ops,
adxl372_fifo_attributes);
if (ret < 0)
diff --git a/drivers/iio/accel/bmc150-accel-core.c b/drivers/iio/accel/bmc150-accel-core.c
index e8693a42ad46..63216321cdb5 100644
--- a/drivers/iio/accel/bmc150-accel-core.c
+++ b/drivers/iio/accel/bmc150-accel-core.c
@@ -1734,6 +1734,7 @@ int bmc150_accel_core_probe(struct device *dev, struct regmap *regmap, int irq,
ret = iio_triggered_buffer_setup_ext(indio_dev,
&iio_pollfunc_store_time,
bmc150_accel_trigger_handler,
+ IIO_BUFFER_DIRECTION_IN,
&bmc150_accel_buffer_ops,
fifo_attrs);
if (ret < 0) {
diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c
index ea5ca163d879..7093611e321e 100644
--- a/drivers/iio/adc/at91-sama5d2_adc.c
+++ b/drivers/iio/adc/at91-sama5d2_adc.c
@@ -1681,8 +1681,8 @@ static int at91_adc_buffer_and_trigger_init(struct device *dev,
fifo_attrs = NULL;
ret = devm_iio_triggered_buffer_setup_ext(&indio->dev, indio,
- &iio_pollfunc_store_time,
- &at91_adc_trigger_handler, &at91_buffer_setup_ops, fifo_attrs);
+ &iio_pollfunc_store_time, &at91_adc_trigger_handler,
+ IIO_BUFFER_DIRECTION_IN, &at91_buffer_setup_ops, fifo_attrs);
if (ret < 0) {
dev_err(dev, "couldn't initialize the buffer.\n");
return ret;
diff --git a/drivers/iio/buffer/industrialio-triggered-buffer.c b/drivers/iio/buffer/industrialio-triggered-buffer.c
index f77c4538141e..8d4fc97d1005 100644
--- a/drivers/iio/buffer/industrialio-triggered-buffer.c
+++ b/drivers/iio/buffer/industrialio-triggered-buffer.c
@@ -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;
diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
index 28bde13003b7..e9f64da06f89 100644
--- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
+++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
@@ -360,8 +360,9 @@ int cros_ec_sensors_core_init(struct platform_device *pdev,
* The only way to get samples in buffer is to set a
* software trigger (systrig, hrtimer).
*/
- ret = devm_iio_triggered_buffer_setup(dev, indio_dev,
- NULL, trigger_capture, NULL);
+ ret = devm_iio_triggered_buffer_setup_ext(dev,
+ indio_dev, NULL, trigger_capture,
+ IIO_BUFFER_DIRECTION_IN, NULL);
if (ret)
return ret;
}
diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
index a4ec11a3b68a..1151434038d4 100644
--- a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
+++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
@@ -241,8 +241,9 @@ int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name,
fifo_attrs = NULL;
ret = iio_triggered_buffer_setup_ext(indio_dev,
- &iio_pollfunc_store_time,
- NULL, NULL, fifo_attrs);
+ &iio_pollfunc_store_time, NULL,
+ IIO_BUFFER_DIRECTION_IN,
+ NULL, fifo_attrs);
if (ret) {
dev_err(&indio_dev->dev, "Triggered Buffer Setup Failed\n");
return ret;
diff --git a/include/linux/iio/triggered_buffer.h b/include/linux/iio/triggered_buffer.h
index 7f154d1f8739..7490b05fc5b2 100644
--- a/include/linux/iio/triggered_buffer.h
+++ b/include/linux/iio/triggered_buffer.h
@@ -2,6 +2,7 @@
#ifndef _LINUX_IIO_TRIGGERED_BUFFER_H_
#define _LINUX_IIO_TRIGGERED_BUFFER_H_
+#include <linux/iio/buffer.h>
#include <linux/interrupt.h>
struct attribute;
@@ -11,21 +12,27 @@ struct iio_buffer_setup_ops;
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);
void iio_triggered_buffer_cleanup(struct iio_dev *indio_dev);
#define iio_triggered_buffer_setup(indio_dev, h, thread, setup_ops) \
- iio_triggered_buffer_setup_ext((indio_dev), (h), (thread), (setup_ops), NULL)
+ iio_triggered_buffer_setup_ext((indio_dev), (h), (thread), \
+ IIO_BUFFER_DIRECTION_IN, (setup_ops), \
+ NULL)
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);
#define devm_iio_triggered_buffer_setup(dev, indio_dev, h, thread, setup_ops) \
- devm_iio_triggered_buffer_setup_ext((dev), (indio_dev), (h), (thread), (setup_ops), NULL)
+ devm_iio_triggered_buffer_setup_ext((dev), (indio_dev), (h), (thread), \
+ IIO_BUFFER_DIRECTION_IN, \
+ (setup_ops), NULL)
#endif
--
2.27.0