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iio: imu: st_lsm6dsx: add wakeup-source option

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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@geanix.com>
Reviewed-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Sean Nyekjaer 2019-09-16 15:56:28 +02:00 committed by Jonathan Cameron
parent b5969abfa8
commit 4c997dfa69
1 changed files with 14 additions and 0 deletions
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14
drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
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@ -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 +1879,13 @@ static int __maybe_unused st_lsm6dsx_suspend(struct device *dev)
if (!(hw->enable_mask & BIT(sensor->id)))
continue;
if (device_may_wakeup(dev) &&
sensor->id == ST_LSM6DSX_ID_ACC && hw->enable_event) {
/* 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)
@ -1905,6 +1915,10 @@ static int __maybe_unused st_lsm6dsx_resume(struct device *dev)
continue;
sensor = iio_priv(hw->iio_devs[i]);
if (device_may_wakeup(dev) &&
sensor->id == ST_LSM6DSX_ID_ACC && hw->enable_event)
disable_irq_wake(hw->irq);
if (!(hw->suspend_mask & BIT(sensor->id)))
continue;