iio: hid-sensors: use asynchronous resume

Some platforms power off sensor hubs during S3 suspend, which will require
longer time to resume. This hurts system resume time, so resume
asynchronously.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 21 insertions, 1 deletions

diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
index 5b41f9d0d4f3..5264ed6e03e5 100644
--- a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
+++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
@@ -122,6 +122,14 @@ int hid_sensor_power_state(struct hid_sensor_common *st, bool state)
 #endif
 }
 
+static void hid_sensor_set_power_work(struct work_struct *work)
+{
+        struct hid_sensor_common *attrb = container_of(work,
+                                                       struct hid_sensor_common,
+                                                       work);
+        _hid_sensor_power_state(attrb, true);
+}
+
 static int hid_sensor_data_rdy_trigger_set_state(struct iio_trigger *trig,
                                                 bool state)
 {
@@ -130,6 +138,7 @@ static int hid_sensor_data_rdy_trigger_set_state(struct iio_trigger *trig,
 
 void hid_sensor_remove_trigger(struct hid_sensor_common *attrb)
 {
+        cancel_work_sync(&attrb->work);
         iio_trigger_unregister(attrb->trigger);
         iio_trigger_free(attrb->trigger);
 }
@@ -170,6 +179,9 @@ int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name,
                 goto error_unreg_trigger;
 
         iio_device_set_drvdata(indio_dev, attrb);
+
+        INIT_WORK(&attrb->work, hid_sensor_set_power_work);
+
         pm_suspend_ignore_children(&attrb->pdev->dev, true);
         pm_runtime_enable(&attrb->pdev->dev);
         /* Default to 3 seconds, but can be changed from sysfs */
@@ -202,7 +214,15 @@ static int hid_sensor_resume(struct device *dev)
         struct platform_device *pdev = to_platform_device(dev);
         struct iio_dev *indio_dev = platform_get_drvdata(pdev);
         struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev);
+        schedule_work(&attrb->work);
+        return 0;
+}
 
+static int hid_sensor_runtime_resume(struct device *dev)
+{
+        struct platform_device *pdev = to_platform_device(dev);
+        struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+        struct hid_sensor_common *attrb = iio_device_get_drvdata(indio_dev);
         return _hid_sensor_power_state(attrb, true);
 }
 
@@ -211,7 +231,7 @@ static int hid_sensor_resume(struct device *dev)
 const struct dev_pm_ops hid_sensor_pm_ops = {
         SET_SYSTEM_SLEEP_PM_OPS(hid_sensor_suspend, hid_sensor_resume)
         SET_RUNTIME_PM_OPS(hid_sensor_suspend,
-                           hid_sensor_resume, NULL)
+                           hid_sensor_runtime_resume, NULL)
 };
 EXPORT_SYMBOL(hid_sensor_pm_ops);