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) 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 dd639420fb0f..ef0f6560953c 100644 --- a/drivers/iio/accel/fxls8962af-core.c +++ b/drivers/iio/accel/fxls8962af-core.c @@ -160,6 +160,7 @@ 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; @@ -1123,6 +1124,7 @@ 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) @@ -1192,6 +1194,9 @@ 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); @@ -1217,9 +1222,46 @@ 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