linux-kernel - [PATCH v3 4/9] iio: imu: adis_buffer: Add buffer setup API with buffer attributes

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Message-Id: <20240517074750.87376-5-ramona.bolboaca13@gmail.com>
Date: Fri, 17 May 2024 10:47:45 +0300
From: Ramona Gradinariu <ramona.bolboaca13@...il.com>
To: linux-kernel@...r.kernel.org,
	jic23@...nel.org,
	linux-iio@...r.kernel.org,
	devicetree@...r.kernel.org,
	conor+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org,
	robh@...nel.org,
	nuno.sa@...log.com
Cc: Ramona Gradinariu <ramona.bolboaca13@...il.com>
Subject: [PATCH v3 4/9] iio: imu: adis_buffer: Add buffer setup API with buffer attributes

Add new API called devm_adis_setup_buffer_and_trigger_with_attrs() which
also takes buffer attributes as a parameter.
Rewrite devm_adis_setup_buffer_and_trigger() implementation such that it
calls devm_adis_setup_buffer_and_trigger_with_attrs() with buffer
attributes parameter NULL

Signed-off-by: Ramona Gradinariu <ramona.bolboaca13@...il.com>
---
changes in v3:
 - added forward declaration for iio_dev_attr
 drivers/iio/imu/adis_buffer.c | 32 ++++++++++++++++++--------------
 include/linux/iio/imu/adis.h  | 19 +++++++++++++++----
 2 files changed, 33 insertions(+), 18 deletions(-)

diff --git a/drivers/iio/imu/adis_buffer.c b/drivers/iio/imu/adis_buffer.c
index 928933027ae3..871b78b225e2 100644
--- a/drivers/iio/imu/adis_buffer.c
+++ b/drivers/iio/imu/adis_buffer.c
@@ -175,31 +175,36 @@ static void adis_buffer_cleanup(void *arg)
 }

 /**
- * devm_adis_setup_buffer_and_trigger() - Sets up buffer and trigger for
- *					  the managed adis device
+ * devm_adis_setup_buffer_and_trigger_with_attrs() - Sets up buffer and trigger
+ * for the managed adis device with buffer attributes.
  * @adis: The adis device
  * @indio_dev: The IIO device
- * @trigger_handler: Optional trigger handler, may be NULL.
+ * @trigger_handler: Trigger handler: should handle the buffer readings.
+ * @ops: Optional buffer setup functions, may be NULL.
+ * @buffer_attrs: Extra buffer attributes.
  *
  * Returns 0 on success, a negative error code otherwise.
  *
- * This function sets up the buffer and trigger for a adis devices.  If
- * 'trigger_handler' is NULL the default trigger handler will be used. The
- * default trigger handler will simply read the registers assigned to the
- * currently active channels.
+ * This function sets up the buffer (with buffer setup functions and extra
+ * buffer attributes) and trigger for a adis devices with buffer attributes.
  */
 int
-devm_adis_setup_buffer_and_trigger(struct adis *adis, struct iio_dev *indio_dev,
-				   irq_handler_t trigger_handler)
+devm_adis_setup_buffer_and_trigger_with_attrs(struct adis *adis, struct iio_dev *indio_dev,
+					      irq_handler_t trigger_handler,
+					      const struct iio_buffer_setup_ops *ops,
+					      const struct iio_dev_attr **buffer_attrs)
 {
 	int ret;

 	if (!trigger_handler)
 		trigger_handler = adis_trigger_handler;

-	ret = devm_iio_triggered_buffer_setup(&adis->spi->dev, indio_dev,
-					      &iio_pollfunc_store_time,
-					      trigger_handler, NULL);
+	ret = devm_iio_triggered_buffer_setup_ext(&adis->spi->dev, indio_dev,
+						  &iio_pollfunc_store_time,
+						  trigger_handler,
+						  IIO_BUFFER_DIRECTION_IN,
+						  ops,
+						  buffer_attrs);
 	if (ret)
 		return ret;

@@ -212,5 +217,4 @@ devm_adis_setup_buffer_and_trigger(struct adis *adis, struct iio_dev *indio_dev,
 	return devm_add_action_or_reset(&adis->spi->dev, adis_buffer_cleanup,
 					adis);
 }
-EXPORT_SYMBOL_NS_GPL(devm_adis_setup_buffer_and_trigger, IIO_ADISLIB);
-
+EXPORT_SYMBOL_NS_GPL(devm_adis_setup_buffer_and_trigger_with_attrs, IIO_ADISLIB);
diff --git a/include/linux/iio/imu/adis.h b/include/linux/iio/imu/adis.h
index 8898966bc0f0..8dda3cfa5773 100644
--- a/include/linux/iio/imu/adis.h
+++ b/include/linux/iio/imu/adis.h
@@ -21,6 +21,7 @@
 #define ADIS_REG_PAGE_ID 0x00

 struct adis;
+struct iio_dev_attr;

 /**
  * struct adis_timeouts - ADIS chip variant timeouts
@@ -515,11 +516,19 @@ int adis_single_conversion(struct iio_dev *indio_dev,
 #define ADIS_ROT_CHAN(mod, addr, si, info_sep, info_all, bits) \
 	ADIS_MOD_CHAN(IIO_ROT, mod, addr, si, info_sep, info_all, bits)

+#define devm_adis_setup_buffer_and_trigger(adis, indio_dev, trigger_handler)	\
+	devm_adis_setup_buffer_and_trigger_with_attrs((adis), (indio_dev),	\
+						      (trigger_handler), NULL,	\
+						      NULL)
+
 #ifdef CONFIG_IIO_ADIS_LIB_BUFFER

 int
-devm_adis_setup_buffer_and_trigger(struct adis *adis, struct iio_dev *indio_dev,
-				   irq_handler_t trigger_handler);
+devm_adis_setup_buffer_and_trigger_with_attrs(struct adis *adis,
+					      struct iio_dev *indio_dev,
+					      irq_handler_t trigger_handler,
+					      const struct iio_buffer_setup_ops *ops,
+					      const struct iio_dev_attr **buffer_attrs);

 int devm_adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev);

@@ -529,8 +538,10 @@ int adis_update_scan_mode(struct iio_dev *indio_dev,
 #else /* CONFIG_IIO_BUFFER */

 static inline int
-devm_adis_setup_buffer_and_trigger(struct adis *adis, struct iio_dev *indio_dev,
-				   irq_handler_t trigger_handler)
+devm_adis_setup_buffer_and_trigger_with_attrs(struct adis *adis, struct iio_dev *indio_dev,
+					      irq_handler_t trigger_handler,
+					      const struct iio_buffer_setup_ops *ops,
+					      const struct iio_dev_attr **buffer_attrs)
 {
 	return 0;
 }
--
2.34.1