[PATCH 2/5] iio: imu: adis: Add irq mask variable

[Nuno Sá <nuno.sa@xxxxxxxxxx>]

There are some ADIS devices that can configure the data ready pin
polarity. Hence, we cannot hardcode our IRQ mask as IRQF_TRIGGER_RISING
since we might want to have it as IRQF_TRIGGER_FALLING.

Signed-off-by: Nuno Sá <nuno.sa@xxxxxxxxxx>
---
 drivers/iio/imu/adis_trigger.c | 26 ++++++++++++++++++++++++--
 include/linux/iio/imu/adis.h   |  1 +
 2 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/imu/adis_trigger.c b/drivers/iio/imu/adis_trigger.c
index a07dcc365c18..ae5a4f66752f 100644
--- a/drivers/iio/imu/adis_trigger.c
+++ b/drivers/iio/imu/adis_trigger.c
@@ -34,6 +34,20 @@ static inline void adis_trigger_setup(struct adis *adis)
 	iio_trigger_set_drvdata(adis->trig, adis);
 }
 
+static inline int __adis_validate_irq_mask(struct adis *adis)
+{
+	if (!adis->irq_mask) {
+		adis->irq_mask = IRQF_TRIGGER_RISING;
+		return 0;
+	} else if (adis->irq_mask != IRQF_TRIGGER_RISING &&
+		   adis->irq_mask != IRQF_TRIGGER_FALLING) {
+		dev_err(&adis->spi->dev, "Invalid IRQ mask:%08lx\n",
+			adis->irq_mask);
+		return -EINVAL;
+	}
+
+	return 0;
+}
 /**
  * adis_probe_trigger() - Sets up trigger for a adis device
  * @adis: The adis device
@@ -54,9 +68,13 @@ int adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev)
 
 	adis_trigger_setup(adis);
 
+	ret = __adis_validate_irq_mask(adis);
+	if (ret)
+		return ret;
+
 	ret = request_irq(adis->spi->irq,
 			  &iio_trigger_generic_data_rdy_poll,
-			  IRQF_TRIGGER_RISING,
+			  adis->irq_mask,
 			  indio_dev->name,
 			  adis->trig);
 	if (ret)
@@ -95,9 +113,13 @@ int devm_adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev)
 
 	adis_trigger_setup(adis);
 
+	ret = __adis_validate_irq_mask(adis);
+	if (ret)
+		return ret;
+
 	ret = devm_request_irq(&adis->spi->dev, adis->spi->irq,
 			       &iio_trigger_generic_data_rdy_poll,
-			       IRQF_TRIGGER_RISING,
+			       adis->irq_mask,
 			       indio_dev->name,
 			       adis->trig);
 	if (ret)
diff --git a/include/linux/iio/imu/adis.h b/include/linux/iio/imu/adis.h
index 741512b28aaa..b4c35d137e2a 100644
--- a/include/linux/iio/imu/adis.h
+++ b/include/linux/iio/imu/adis.h
@@ -84,6 +84,7 @@ struct adis {
 	struct spi_message	msg;
 	struct spi_transfer	*xfer;
 	unsigned int		current_page;
+	unsigned long		irq_mask;
 	void			*buffer;
 
 	uint8_t			tx[10] ____cacheline_aligned;
-- 
2.25.1