[PATCH v3 07/10] iio: accel: adxl345: initialize IRQ number

[Lothar Rubusch <l.rubusch@gmail.com>]

Add the possibility to claim an interrupt and init the state structure
with interrupt number and interrupt line to use. The adxl345 can use
two different interrupt lines, mainly to signal FIFO watermark events,
single or double tap, activity, etc. Hence, having the interrupt line
available is crucial to implement such features.

Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com>
---
 drivers/iio/accel/adxl345_core.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/iio/accel/adxl345_core.c b/drivers/iio/accel/adxl345_core.c
index 0bb2c653e13..dc91b2dcd62 100644
--- a/drivers/iio/accel/adxl345_core.c
+++ b/drivers/iio/accel/adxl345_core.c
@@ -11,6 +11,7 @@
 #include <linux/property.h>
 #include <linux/regmap.h>
 #include <linux/units.h>
+#include <linux/interrupt.h>
 
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
@@ -18,8 +19,10 @@
 #include "adxl345.h"
 
 struct adxl345_state {
+	int irq;
 	const struct adxl345_chip_info *info;
 	struct regmap *regmap;
+	u8 intio;
 };
 
 #define ADXL345_CHANNEL(index, axis) {					\
@@ -212,6 +215,17 @@ int adxl345_core_probe(struct device *dev, struct regmap *regmap,
 
 	st = iio_priv(indio_dev);
 	st->regmap = regmap;
+
+	st->intio = -1;
+	st->irq = fwnode_irq_get_byname(dev_fwnode(dev), "INT1");
+	if (st->irq > 0)
+		st->intio = ADXL345_INT1;
+	else {
+		st->irq = fwnode_irq_get_byname(dev_fwnode(dev), "INT2");
+		if (st->irq > 0)
+			st->intio = ADXL345_INT2;
+	}
+
 	st->info = device_get_match_data(dev);
 	if (!st->info)
 		return -ENODEV;
-- 
2.39.5