linux-kernel - [PATCH v7 4/7] iio: accel: adxl345: introduce interrupt handling

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Message-Id: <20241213211909.40896-5-l.rubusch@gmail.com>
Date: Fri, 13 Dec 2024 21:19:06 +0000
From: Lothar Rubusch <l.rubusch@...il.com>
To: lars@...afoo.de,
	Michael.Hennerich@...log.com,
	jic23@...nel.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org
Cc: devicetree@...r.kernel.org,
	linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	eraretuya@...il.com,
	l.rubusch@...il.com
Subject: [PATCH v7 4/7] iio: accel: adxl345: introduce interrupt handling

Add the possibility to claim an interrupt. Init the state structure
with an interrupt line obtained from the DT. The adxl345 can use
two different interrupt lines for event handling. Only one is used.

Signed-off-by: Lothar Rubusch <l.rubusch@...il.com>
---
 drivers/iio/accel/adxl345_core.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/iio/accel/adxl345_core.c b/drivers/iio/accel/adxl345_core.c
index b48bc838c..fb3b45d99 100644
--- a/drivers/iio/accel/adxl345_core.c
+++ b/drivers/iio/accel/adxl345_core.c
@@ -11,15 +11,22 @@
 #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>
 
 #include "adxl345.h"
 
+#define ADXL345_INT_NONE		0xff
+#define ADXL345_INT1			0
+#define ADXL345_INT2			1
+
 struct adxl345_state {
+	int irq;
 	const struct adxl345_chip_info *info;
 	struct regmap *regmap;
+	u8 intio;
 };
 
 #define ADXL345_CHANNEL(index, axis) {					\
@@ -213,6 +220,7 @@ int adxl345_core_probe(struct device *dev, struct regmap *regmap,
 
 	st = iio_priv(indio_dev);
 	st->regmap = regmap;
+
 	st->info = device_get_match_data(dev);
 	if (!st->info)
 		return -ENODEV;
@@ -263,6 +271,15 @@ int adxl345_core_probe(struct device *dev, struct regmap *regmap,
 	if (ret < 0)
 		return ret;
 
+	st->intio = ADXL345_INT1;
+	st->irq = fwnode_irq_get_byname(dev_fwnode(dev), "INT1");
+	if (st->irq < 0) {
+		st->intio = ADXL345_INT2;
+		st->irq = fwnode_irq_get_byname(dev_fwnode(dev), "INT2");
+		if (st->irq < 0)
+			st->intio = ADXL345_INT_NONE;
+	}
+
 	return devm_iio_device_register(dev, indio_dev);
 }
 EXPORT_SYMBOL_NS_GPL(adxl345_core_probe, IIO_ADXL345);
-- 
2.39.5