This adds ways for the SoC to wake from accelerometer wake events.
In the suspend function we skip disabling the sensor if wakeup-source
and events are activated.
If buffered reads are enabled they will be deactivated before suspend.
As the onboard buffer is only holding up to 32 12-bit X/Y/Z data
triplets.
Signed-off-by: Sean Nyekjaer <sean@xxxxxxxxxx>
Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
---
Changes since v1:
- Fixed comments fron Andy (Thanks)
Changes since v3:
- None
drivers/iio/accel/fxls8962af-core.c | 46 +++++++++++++++++++++++++++--
1 file changed, 44 insertions(+), 2 deletions(-)
diff --git a/drivers/iio/accel/fxls8962af-core.c b/drivers/iio/accel/fxls8962af-core.c
index 857940529e7d..4f7adba4fb3a 100644
--- a/drivers/iio/accel/fxls8962af-core.c
+++ b/drivers/iio/accel/fxls8962af-core.c
@@ -166,6 +166,7 @@ struct fxls8962af_data {
} scan;
int64_t timestamp, old_timestamp; /* Only used in hw fifo mode. */
struct iio_mount_matrix orientation;
+ int irq;
u8 watermark;
u8 enable_event;
u16 lower_thres;
@@ -1160,6 +1161,7 @@ int fxls8962af_core_probe(struct device *dev, struct regmap *regmap, int irq)
data = iio_priv(indio_dev);
dev_set_drvdata(dev, indio_dev);
data->regmap = regmap;
+ data->irq = irq;
ret = iio_read_mount_matrix(dev, &data->orientation);
if (ret)
@@ -1229,6 +1231,9 @@ int fxls8962af_core_probe(struct device *dev, struct regmap *regmap, int irq)
if (ret)
return ret;
+ if (device_property_read_bool(dev, "wakeup-source"))
+ device_init_wakeup(dev, true);
+
return devm_iio_device_register(dev, indio_dev);
}
EXPORT_SYMBOL_GPL(fxls8962af_core_probe);
@@ -1254,9 +1259,46 @@ static int __maybe_unused fxls8962af_runtime_resume(struct device *dev)
return fxls8962af_active(data);
}
+static int __maybe_unused fxls8962af_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct fxls8962af_data *data = iio_priv(indio_dev);
+
+ if (device_may_wakeup(dev) && data->enable_event) {
+ enable_irq_wake(data->irq);
+
+ /*
+ * Disable buffer, as the buffer is so small the device will wake
+ * almost immediately.
+ */
+ if (iio_buffer_enabled(indio_dev))
+ fxls8962af_buffer_predisable(indio_dev);
+ } else {
+ fxls8962af_runtime_suspend(dev);
+ }
+
+ return 0;
+}
+
+static int __maybe_unused fxls8962af_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct fxls8962af_data *data = iio_priv(indio_dev);
+
+ if (device_may_wakeup(dev) && data->enable_event) {
+ disable_irq_wake(data->irq);
+
+ if (iio_buffer_enabled(indio_dev))
+ fxls8962af_buffer_postenable(indio_dev);
+ } else {
+ fxls8962af_runtime_resume(dev);
+ }
+
+ return 0;
+}
+
const struct dev_pm_ops fxls8962af_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
- pm_runtime_force_resume)
+ SET_SYSTEM_SLEEP_PM_OPS(fxls8962af_suspend, fxls8962af_resume)
SET_RUNTIME_PM_OPS(fxls8962af_runtime_suspend,
fxls8962af_runtime_resume, NULL)
};
--
2.33.0
