[PATCH v2 1/2] iio: bmi270: suspend and resume triggering on relevant pm operations

[Denis Benato]

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@xxxxxxxxx

Signed-off-by: Denis Benato <benato.denis96@xxxxxxxxx>
Tested-by: Justin Weiss <justin@xxxxxxxxxxxxxxx>
---
 drivers/iio/imu/bmi270/bmi270.h      |  2 ++
 drivers/iio/imu/bmi270/bmi270_core.c | 20 ++++++++++++++++++++
 drivers/iio/imu/bmi270/bmi270_i2c.c  |  2 ++
 drivers/iio/imu/bmi270/bmi270_spi.c  |  2 ++
 4 files changed, 26 insertions(+)

diff --git a/drivers/iio/imu/bmi270/bmi270.h b/drivers/iio/imu/bmi270/bmi270.h
index d94525f6aee8..a6c4204032fc 100644
--- a/drivers/iio/imu/bmi270/bmi270.h
+++ b/drivers/iio/imu/bmi270/bmi270.h
@@ -20,4 +20,6 @@ struct device;
 int bmi270_core_probe(struct device *dev, struct regmap *regmap,
 		      const struct bmi270_chip_info *chip_info);
 
+extern const struct dev_pm_ops bmi270_core_pm_ops;
+
 #endif  /* BMI270_H_ */
diff --git a/drivers/iio/imu/bmi270/bmi270_core.c b/drivers/iio/imu/bmi270/bmi270_core.c
index 2e4469f30d53..b54658f972ad 100644
--- a/drivers/iio/imu/bmi270/bmi270_core.c
+++ b/drivers/iio/imu/bmi270/bmi270_core.c
@@ -982,6 +982,7 @@ int bmi270_core_probe(struct device *dev, struct regmap *regmap,
 	indio_dev->available_scan_masks = bmi270_avail_scan_masks;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &bmi270_info;
+	dev_set_drvdata(data->dev, indio_dev);
 
 	ret = bmi270_trigger_probe(data, indio_dev);
 	if (ret)
@@ -997,6 +998,25 @@ int bmi270_core_probe(struct device *dev, struct regmap *regmap,
 }
 EXPORT_SYMBOL_NS_GPL(bmi270_core_probe, "IIO_BMI270");
 
+static int bmi270_core_runtime_suspend(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+
+	return iio_device_suspend_triggering(indio_dev);
+}
+
+static int bmi270_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 bmi270_core_pm_ops = {
+	RUNTIME_PM_OPS(bmi270_core_runtime_suspend, bmi270_core_runtime_resume, NULL)
+};
+EXPORT_SYMBOL_NS_GPL(bmi270_core_pm_ops, "IIO_BMI270");
+
 MODULE_AUTHOR("Alex Lanzano");
 MODULE_DESCRIPTION("BMI270 driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/iio/imu/bmi270/bmi270_i2c.c b/drivers/iio/imu/bmi270/bmi270_i2c.c
index 44699ab58909..c77839b03a96 100644
--- a/drivers/iio/imu/bmi270/bmi270_i2c.c
+++ b/drivers/iio/imu/bmi270/bmi270_i2c.c
@@ -4,6 +4,7 @@
 #include <linux/iio/iio.h>
 #include <linux/module.h>
 #include <linux/mod_devicetable.h>
+#include <linux/pm.h>
 #include <linux/regmap.h>
 
 #include "bmi270.h"
@@ -52,6 +53,7 @@ static const struct of_device_id bmi270_of_match[] = {
 static struct i2c_driver bmi270_i2c_driver = {
 	.driver = {
 		.name = "bmi270_i2c",
+		.pm = pm_ptr(&bmi270_core_pm_ops),
 		.acpi_match_table = bmi270_acpi_match,
 		.of_match_table = bmi270_of_match,
 	},
diff --git a/drivers/iio/imu/bmi270/bmi270_spi.c b/drivers/iio/imu/bmi270/bmi270_spi.c
index 88a77aba5e4f..19dd7734f9d0 100644
--- a/drivers/iio/imu/bmi270/bmi270_spi.c
+++ b/drivers/iio/imu/bmi270/bmi270_spi.c
@@ -3,6 +3,7 @@
 #include <linux/iio/iio.h>
 #include <linux/mod_devicetable.h>
 #include <linux/module.h>
+#include <linux/pm.h>
 #include <linux/regmap.h>
 #include <linux/spi/spi.h>
 
@@ -79,6 +80,7 @@ static const struct of_device_id bmi270_of_match[] = {
 static struct spi_driver bmi270_spi_driver = {
 	.driver = {
 		.name = "bmi270",
+		.pm = pm_ptr(&bmi270_core_pm_ops),
 		.of_match_table = bmi270_of_match,
 	},
 	.probe = bmi270_spi_probe,
-- 
2.49.0