[PATCH v2 2/4] iio: hid-sensors: introduce device managed API

[Sanjay Chitroda]

From: Sanjay Chitroda <sanjayembeddedse@xxxxxxxxx>

hid_sensor_setup_trigger() is common API used for the HID IIO drivers,
prepare devm API devm_hid_sensor_setup_trigger() to acquire resource
during setup and release using device managed framework during drivers
fail, unbind or remove path.

Register action with devm_add_action_or_reset() to release resource with
devres framework.

Signed-off-by: Sanjay Chitroda <sanjayembeddedse@xxxxxxxxx>
---
 .../common/hid-sensors/hid-sensor-trigger.c   | 24 +++++++++++++++++++
 .../common/hid-sensors/hid-sensor-trigger.h   |  2 ++
 2 files changed, 26 insertions(+)

diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
index 28d050b45c74..6692f403c8ec 100644
--- a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
+++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
@@ -301,6 +301,30 @@ int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name,
 }
 EXPORT_SYMBOL_NS(hid_sensor_setup_trigger, "IIO_HID");
 
+static void hid_sensor_remove_trigger_action(void *ptr)
+{
+	struct hid_sensor_common *attrb = ptr;
+
+	hid_sensor_remove_trigger(attrb);
+}
+
+int devm_hid_sensor_setup_trigger(struct device *dev, struct iio_dev *indio_dev,
+				  const char *name, struct hid_sensor_common *attrb)
+{
+	int ret;
+
+	ret = hid_sensor_setup_trigger(indio_dev, name, attrb);
+	if (ret)
+		return ret;
+
+	ret = devm_add_action_or_reset(dev, hid_sensor_remove_trigger_action, attrb);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+EXPORT_SYMBOL_NS(devm_hid_sensor_setup_trigger, "IIO_HID");
+
 static int __maybe_unused hid_sensor_suspend(struct device *dev)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.h b/drivers/iio/common/hid-sensors/hid-sensor-trigger.h
index afec46ecbe71..6fd7c39a240d 100644
--- a/drivers/iio/common/hid-sensors/hid-sensor-trigger.h
+++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.h
@@ -17,6 +17,8 @@ extern const struct dev_pm_ops hid_sensor_pm_ops;
 int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name,
 				struct hid_sensor_common *attrb);
 void hid_sensor_remove_trigger(struct hid_sensor_common *attrb);
+int devm_hid_sensor_setup_trigger(struct device *dev, struct iio_dev *indio_dev,
+				  const char *name, struct hid_sensor_common *attrb);
 int hid_sensor_power_state(struct hid_sensor_common *st, bool state);
 
 #endif
-- 
2.34.1