linux-kernel - [PATCH v2 2/2] iio: bmi160: suspend and resume triggering on relevant pm operations

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Message-ID: <20250525142530.71955-3-benato.denis96@gmail.com>
Date: Sun, 25 May 2025 16:25:30 +0200
From: Denis Benato <benato.denis96@...il.com>
To: Jonathan Cameron <jic23@...nel.org>
Cc: David Lechner <dlechner@...libre.com>,
	Nuno Sá <nuno.sa@...log.com>,
	Alex Lanzano <lanzano.alex@...il.com>,
	Andy Shevchenko <andy@...nel.org>,
	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Danila Tikhonov <danila@...xyga.com>,
	Greg KH <gregkh@...uxfoundation.org>,
	"Derek J . Clark" <derekjohn.clark@...il.com>,
	Philip Müller <philm@...jaro.org>,
	linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Denis Benato <benato.denis96@...il.com>
Subject: [PATCH v2 2/2] iio: bmi160: suspend and resume triggering on relevant pm operations

Prevent triggers from stop working after the device has entered sleep:
use iio_device_suspend_triggering and iio_device_resume_triggering helpers.

Closes: https://lore.kernel.org/all/31d7f7aa-e834-4fd0-a66a-e0ff528425dc@gmail.com

Signed-off-by: Denis Benato <benato.denis96@...il.com>
---
 drivers/iio/imu/bmi160/bmi160.h      |  2 ++
 drivers/iio/imu/bmi160/bmi160_core.c | 19 +++++++++++++++++++
 drivers/iio/imu/bmi160/bmi160_i2c.c  |  2 ++
 drivers/iio/imu/bmi160/bmi160_spi.c  |  2 ++
 4 files changed, 25 insertions(+)

diff --git a/drivers/iio/imu/bmi160/bmi160.h b/drivers/iio/imu/bmi160/bmi160.h
index 32c2ea2d7112..ffbe8205e703 100644
--- a/drivers/iio/imu/bmi160/bmi160.h
+++ b/drivers/iio/imu/bmi160/bmi160.h
@@ -28,4 +28,6 @@ int bmi160_enable_irq(struct regmap *regmap, bool enable);
 
 int bmi160_probe_trigger(struct iio_dev *indio_dev, int irq, u32 irq_type);
 
+extern const struct dev_pm_ops bmi160_core_pm_ops;
+
 #endif  /* BMI160_H_ */
diff --git a/drivers/iio/imu/bmi160/bmi160_core.c b/drivers/iio/imu/bmi160/bmi160_core.c
index 0423ef6f9571..9aa54b95b89f 100644
--- a/drivers/iio/imu/bmi160/bmi160_core.c
+++ b/drivers/iio/imu/bmi160/bmi160_core.c
@@ -890,6 +890,25 @@ int bmi160_core_probe(struct device *dev, struct regmap *regmap,
 }
 EXPORT_SYMBOL_NS_GPL(bmi160_core_probe, "IIO_BMI160");
 
+static int bmi160_core_runtime_suspend(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+
+	return iio_device_suspend_triggering(indio_dev);
+}
+
+static int bmi160_core_runtime_resume(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+
+	return iio_device_resume_triggering(indio_dev);
+}
+
+const struct dev_pm_ops bmi160_core_pm_ops = {
+	RUNTIME_PM_OPS(bmi160_core_runtime_suspend, bmi160_core_runtime_resume, NULL)
+};
+EXPORT_SYMBOL_NS_GPL(bmi160_core_pm_ops, "IIO_BMI160");
+
 MODULE_AUTHOR("Daniel Baluta <daniel.baluta@...el.com>");
 MODULE_DESCRIPTION("Bosch BMI160 driver");
 MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/imu/bmi160/bmi160_i2c.c b/drivers/iio/imu/bmi160/bmi160_i2c.c
index 9fa3a19a8977..3e2758f4e0d3 100644
--- a/drivers/iio/imu/bmi160/bmi160_i2c.c
+++ b/drivers/iio/imu/bmi160/bmi160_i2c.c
@@ -11,6 +11,7 @@
 #include <linux/i2c.h>
 #include <linux/mod_devicetable.h>
 #include <linux/module.h>
+#include <linux/pm.h>
 #include <linux/regmap.h>
 
 #include "bmi160.h"
@@ -69,6 +70,7 @@ MODULE_DEVICE_TABLE(of, bmi160_of_match);
 static struct i2c_driver bmi160_i2c_driver = {
 	.driver = {
 		.name			= "bmi160_i2c",
+		.pm			= pm_ptr(&bmi160_core_pm_ops),
 		.acpi_match_table	= bmi160_acpi_match,
 		.of_match_table		= bmi160_of_match,
 	},
diff --git a/drivers/iio/imu/bmi160/bmi160_spi.c b/drivers/iio/imu/bmi160/bmi160_spi.c
index ebb586904215..3581bd788483 100644
--- a/drivers/iio/imu/bmi160/bmi160_spi.c
+++ b/drivers/iio/imu/bmi160/bmi160_spi.c
@@ -7,6 +7,7 @@
  */
 #include <linux/mod_devicetable.h>
 #include <linux/module.h>
+#include <linux/pm.h>
 #include <linux/regmap.h>
 #include <linux/spi/spi.h>
 
@@ -61,6 +62,7 @@ static struct spi_driver bmi160_spi_driver = {
 		.acpi_match_table	= bmi160_acpi_match,
 		.of_match_table		= bmi160_of_match,
 		.name			= "bmi160_spi",
+		.pm			= pm_ptr(&bmi160_core_pm_ops),
 	},
 };
 module_spi_driver(bmi160_spi_driver);
-- 
2.49.0