This patch adds support for a managed device version of
adis_setup_buffer_and_trigger. It works exactly as the original
one but it calls all the devm_iio_* functions to setup an iio
buffer and trigger. Hence we do not need to care about cleaning those
and we do not need to support a remove() callback for every driver using
the adis library.
Signed-off-by: Nuno Sá <nuno.sa@xxxxxxxxxx>
---
Changes in v2:
* Added blank lines for readability.
Changes in V3:
* Removed unnecessary inline;
* Free buffer resources.
Changes in v4:
* Make use of irq_handler_t.
Changes in v5:
* Nothing changed.
drivers/iio/imu/adis_buffer.c | 45 ++++++++++++++++++++++++++++++++++
drivers/iio/imu/adis_trigger.c | 41 ++++++++++++++++++++++++++++---
include/linux/iio/imu/adis.h | 17 +++++++++++++
3 files changed, 100 insertions(+), 3 deletions(-)
diff --git a/drivers/iio/imu/adis_buffer.c b/drivers/iio/imu/adis_buffer.c
index 04e5e2a0fd6b..8fdc4dca10c0 100644
--- a/drivers/iio/imu/adis_buffer.c
+++ b/drivers/iio/imu/adis_buffer.c
@@ -156,6 +156,14 @@ static irqreturn_t adis_trigger_handler(int irq, void *p)
return IRQ_HANDLED;
}
+static void adis_buffer_cleanup(void *arg)
+{
+ struct adis *adis = arg;
+
+ kfree(adis->buffer);
+ kfree(adis->xfer);
+}
+
/**
* adis_setup_buffer_and_trigger() - Sets up buffer and trigger for the adis device
* @adis: The adis device.
@@ -198,6 +206,43 @@ int adis_setup_buffer_and_trigger(struct adis *adis, struct iio_dev *indio_dev,
}
EXPORT_SYMBOL_GPL(adis_setup_buffer_and_trigger);
+/**
+ * devm_adis_setup_buffer_and_trigger() - Sets up buffer and trigger for
+ * the managed adis device
+ * @adis: The adis device
+ * @indio_dev: The IIO device
+ * @trigger_handler: Optional trigger handler, may be NULL.
+ *
+ * Returns 0 on success, a negative error code otherwise.
+ *
+ * This function perfoms exactly the same as adis_setup_buffer_and_trigger()
+ */
+int
+devm_adis_setup_buffer_and_trigger(struct adis *adis, struct iio_dev *indio_dev,
+ irq_handler_t trigger_handler)
+{
+ 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);
+ if (ret)
+ return ret;
+
+ if (adis->spi->irq) {
+ ret = devm_adis_probe_trigger(adis, indio_dev);
+ if (ret)
+ return ret;
+ }
+
+ return devm_add_action_or_reset(&adis->spi->dev, adis_buffer_cleanup,
+ adis);
+}
+EXPORT_SYMBOL_GPL(devm_adis_setup_buffer_and_trigger);
+
/**
* adis_cleanup_buffer_and_trigger() - Free buffer and trigger resources
* @adis: The adis device.
diff --git a/drivers/iio/imu/adis_trigger.c b/drivers/iio/imu/adis_trigger.c
index 8b9cd02c0f9f..a36810e0b1ab 100644
--- a/drivers/iio/imu/adis_trigger.c
+++ b/drivers/iio/imu/adis_trigger.c
@@ -27,6 +27,13 @@ static const struct iio_trigger_ops adis_trigger_ops = {
.set_trigger_state = &adis_data_rdy_trigger_set_state,
};
+static void adis_trigger_setup(struct adis *adis)
+{
+ adis->trig->dev.parent = &adis->spi->dev;
+ adis->trig->ops = &adis_trigger_ops;
+ iio_trigger_set_drvdata(adis->trig, adis);
+}
+
/**
* adis_probe_trigger() - Sets up trigger for a adis device
* @adis: The adis device
@@ -45,9 +52,7 @@ int adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev)
if (adis->trig == NULL)
return -ENOMEM;
- adis->trig->dev.parent = &adis->spi->dev;
- adis->trig->ops = &adis_trigger_ops;
- iio_trigger_set_drvdata(adis->trig, adis);
+ adis_trigger_setup(adis);
ret = request_irq(adis->spi->irq,
&iio_trigger_generic_data_rdy_poll,
@@ -73,6 +78,36 @@ int adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev)
}
EXPORT_SYMBOL_GPL(adis_probe_trigger);
+/**
+ * devm_adis_probe_trigger() - Sets up trigger for a managed adis device
+ * @adis: The adis device
+ * @indio_dev: The IIO device
+ *
+ * Returns 0 on success or a negative error code
+ */
+int devm_adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev)
+{
+ int ret;
+
+ adis->trig = devm_iio_trigger_alloc(&adis->spi->dev, "%s-dev%d",
+ indio_dev->name, indio_dev->id);
+ if (!adis->trig)
+ return -ENOMEM;
+
+ adis_trigger_setup(adis);
+
+ ret = devm_request_irq(&adis->spi->dev, adis->spi->irq,
+ &iio_trigger_generic_data_rdy_poll,
+ IRQF_TRIGGER_RISING,
+ indio_dev->name,
+ adis->trig);
+ if (ret)
+ return ret;
+
+ return devm_iio_trigger_register(&adis->spi->dev, adis->trig);
+}
+EXPORT_SYMBOL_GPL(devm_adis_probe_trigger);
+
/**
* adis_remove_trigger() - Remove trigger for a adis devices
* @adis: The adis device
diff --git a/include/linux/iio/imu/adis.h b/include/linux/iio/imu/adis.h
index dd8219138c2e..e70814d96e1c 100644
--- a/include/linux/iio/imu/adis.h
+++ b/include/linux/iio/imu/adis.h
@@ -448,11 +448,15 @@ struct adis_burst {
unsigned int extra_len;
};
+int
+devm_adis_setup_buffer_and_trigger(struct adis *adis, struct iio_dev *indio_dev,
+ irq_handler_t trigger_handler);
int adis_setup_buffer_and_trigger(struct adis *adis,
struct iio_dev *indio_dev, irqreturn_t (*trigger_handler)(int, void *));
void adis_cleanup_buffer_and_trigger(struct adis *adis,
struct iio_dev *indio_dev);
+int devm_adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev);
int adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev);
void adis_remove_trigger(struct adis *adis);
@@ -461,6 +465,13 @@ 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)
+{
+ return 0;
+}
+
static inline int adis_setup_buffer_and_trigger(struct adis *adis,
struct iio_dev *indio_dev, irqreturn_t (*trigger_handler)(int, void *))
{
@@ -472,6 +483,12 @@ static inline void adis_cleanup_buffer_and_trigger(struct adis *adis,
{
}
+static inline int devm_adis_probe_trigger(struct adis *adis,
+ struct iio_dev *indio_dev)
+{
+ return 0;
+}
+
static inline int adis_probe_trigger(struct adis *adis,
struct iio_dev *indio_dev)
{
--
2.17.1
