On 12/09/2019 09.06, Sean Nyekjaer wrote:
This add 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.
Signed-off-by: Sean Nyekjaer <sean@xxxxxxxxxx>
---
Changes since v4:
* More devices supports wakeup
Changes since v5:
* None
Changes since v6:
* None
drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
index 4198ba263d03..f79978a2870f 100644
--- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
@@ -1858,6 +1858,9 @@ int st_lsm6dsx_probe(struct device *dev, int irq, int hw_id,
return err;
}
+ if (dev->of_node && of_property_read_bool(dev->of_node, "wakeup-source"))
+ device_init_wakeup(dev, true);
+
return 0;
}
EXPORT_SYMBOL(st_lsm6dsx_probe);
@@ -1876,6 +1879,12 @@ static int __maybe_unused st_lsm6dsx_suspend(struct device *dev)
if (!(hw->enable_mask & BIT(sensor->id)))
continue;
+ if (device_may_wakeup(dev) && i == ST_LSM6DSX_ID_ACC) {
+ /* Enable wake from IRQ */
+ enable_irq_wake(hw->irq);
+ continue;
+ }
+
if (sensor->id == ST_LSM6DSX_ID_EXT0 ||
sensor->id == ST_LSM6DSX_ID_EXT1 ||
sensor->id == ST_LSM6DSX_ID_EXT2)
@@ -1908,6 +1917,11 @@ static int __maybe_unused st_lsm6dsx_resume(struct device *dev)
if (!(hw->suspend_mask & BIT(sensor->id)))
continue;
+ if (device_may_wakeup(dev) && i == ST_LSM6DSX_ID_ACC) {
+ disable_irq_wake(hw->irq);
+ continue;
+ }
+
This section needs to move above:
> if (!(hw->enable_mask & BIT(sensor->id)))
In the current configuration it will never be reached in event only mode
With the bug mentioned above fixed, have tested suspend/wake with and
without FIFO enabled.
