From 4c997dfa692d8bdc9f2906057d17f1c61d5dcda2 Mon Sep 17 00:00:00 2001 From: Sean Nyekjaer Date: Mon, 16 Sep 2019 15:56:28 +0200 Subject: [PATCH] iio: imu: st_lsm6dsx: add wakeup-source option 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 Reviewed-by: Lorenzo Bianconi Signed-off-by: Jonathan Cameron --- 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 806935c8f033e..dcac1314e7698 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 +1879,13 @@ 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; -- 2.30.2