summaryrefslogtreecommitdiff
path: root/drivers/iio/imu/adis_trigger.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/iio/imu/adis_trigger.c')
-rw-r--r--drivers/iio/imu/adis_trigger.c37
1 files changed, 26 insertions, 11 deletions
diff --git a/drivers/iio/imu/adis_trigger.c b/drivers/iio/imu/adis_trigger.c
index f890bf842db8..a8740b043cfe 100644
--- a/drivers/iio/imu/adis_trigger.c
+++ b/drivers/iio/imu/adis_trigger.c
@@ -34,17 +34,24 @@ static int adis_validate_irq_flag(struct adis *adis)
if (adis->data->unmasked_drdy)
adis->irq_flag |= IRQF_NO_AUTOEN;
/*
- * Typically this devices have data ready either on the rising edge or
- * on the falling edge of the data ready pin. This checks enforces that
- * one of those is set in the drivers... It defaults to
- * IRQF_TRIGGER_RISING for backward compatibility with devices that
- * don't support changing the pin polarity.
+ * Typically adis devices without FIFO have data ready either on the
+ * rising edge or on the falling edge of the data ready pin.
+ * IMU devices with FIFO support have the watermark pin level driven
+ * either high or low when the FIFO is filled with the desired number
+ * of samples.
+ * It defaults to IRQF_TRIGGER_RISING for backward compatibility with
+ * devices that don't support changing the pin polarity.
*/
if (direction == IRQF_TRIGGER_NONE) {
adis->irq_flag |= IRQF_TRIGGER_RISING;
return 0;
} else if (direction != IRQF_TRIGGER_RISING &&
- direction != IRQF_TRIGGER_FALLING) {
+ direction != IRQF_TRIGGER_FALLING && !adis->data->has_fifo) {
+ dev_err(&adis->spi->dev, "Invalid IRQ mask: %08lx\n",
+ adis->irq_flag);
+ return -EINVAL;
+ } else if (direction != IRQF_TRIGGER_HIGH &&
+ direction != IRQF_TRIGGER_LOW && adis->data->has_fifo) {
dev_err(&adis->spi->dev, "Invalid IRQ mask: %08lx\n",
adis->irq_flag);
return -EINVAL;
@@ -77,11 +84,19 @@ int devm_adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev)
if (ret)
return ret;
- ret = devm_request_irq(&adis->spi->dev, adis->spi->irq,
- &iio_trigger_generic_data_rdy_poll,
- adis->irq_flag,
- indio_dev->name,
- adis->trig);
+ if (adis->data->has_fifo)
+ ret = devm_request_threaded_irq(&adis->spi->dev, adis->spi->irq,
+ NULL,
+ &iio_trigger_generic_data_rdy_poll,
+ adis->irq_flag | IRQF_ONESHOT,
+ indio_dev->name,
+ adis->trig);
+ else
+ ret = devm_request_irq(&adis->spi->dev, adis->spi->irq,
+ &iio_trigger_generic_data_rdy_poll,
+ adis->irq_flag,
+ indio_dev->name,
+ adis->trig);
if (ret)
return ret;