linux-kernel - [PATCH v2 4/6] iio: accel: adxl372: add iio events

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Message-ID: <20200225120909.12629-5-alexandru.tachici@analog.com>
Date:   Tue, 25 Feb 2020 14:09:07 +0200
From:   Alexandru Tachici <alexandru.tachici@...log.com>
To:     <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <jic23@...nel.org>
Subject: [PATCH v2 4/6] iio: accel: adxl372: add iio events

Set INT1 interrupts to fire when activity/inactivity
is detected by the device. On irq, push event code by calling
iio_push_event().

Signed-off-by: Alexandru Tachici <alexandru.tachici@...log.com>
---
 drivers/iio/accel/adxl372.c | 37 +++++++++++++++++++++++++++++++++++--
 1 file changed, 35 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/accel/adxl372.c b/drivers/iio/accel/adxl372.c
index 775dc4f0aaf4..e669eaaaa07e 100644
--- a/drivers/iio/accel/adxl372.c
+++ b/drivers/iio/accel/adxl372.c
@@ -114,6 +114,11 @@
 #define ADXL372_STATUS_1_AWAKE(x)		(((x) >> 6) & 0x1)
 #define ADXL372_STATUS_1_ERR_USR_REGS(x)	(((x) >> 7) & 0x1)
 
+/* ADXL372_STATUS_2 */
+#define ADXL372_STATUS_2_INACT(x)		(((x) >> 4) & 0x1)
+#define ADXL372_STATUS_2_ACT(x)			(((x) >> 5) & 0x1)
+#define ADXL372_STATUS_2_AC2(x)			(((x) >> 6) & 0x1)
+
 /* ADXL372_INT1_MAP */
 #define ADXL372_INT1_MAP_DATA_RDY_MSK		BIT(0)
 #define ADXL372_INT1_MAP_DATA_RDY_MODE(x)	(((x) & 0x1) << 0)
@@ -585,6 +590,27 @@ static int adxl372_get_status(struct adxl372_state *st,
 	return ret;
 }
 
+static void adxl372_push_event(struct iio_dev *indio_dev, s64 timestamp,
+			       u8 status2)
+{
+	unsigned int ev_dir;
+
+	if (ADXL372_STATUS_2_ACT(status2))
+		ev_dir = IIO_EV_DIR_RISING;
+
+	if (ADXL372_STATUS_2_INACT(status2))
+		ev_dir = IIO_EV_DIR_FALLING;
+
+	if (ev_dir != IIO_EV_DIR_NONE)
+		iio_push_event(indio_dev,
+			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
+						  0,
+						  IIO_MOD_X_OR_Y_OR_Z,
+						  IIO_EV_TYPE_THRESH,
+						  ev_dir),
+						  timestamp);
+}
+
 static irqreturn_t adxl372_trigger_handler(int irq, void  *p)
 {
 	struct iio_poll_func *pf = p;
@@ -598,6 +624,8 @@ static irqreturn_t adxl372_trigger_handler(int irq, void  *p)
 	if (ret < 0)
 		goto err;
 
+	adxl372_push_event(indio_dev, iio_get_time_ns(indio_dev), status2);
+
 	if (st->fifo_mode != ADXL372_FIFO_BYPASSED &&
 	    ADXL372_STATUS_1_FIFO_FULL(status1)) {
 		/*
@@ -989,7 +1017,10 @@ static int adxl372_buffer_postenable(struct iio_dev *indio_dev)
 	if (ret < 0)
 		return ret;
 
-	ret = adxl372_set_interrupts(st, ADXL372_INT1_MAP_FIFO_FULL_MSK, 0);
+	mask = ADXL372_INT1_MAP_FIFO_FULL_MSK |
+	       ADXL372_INT1_MAP_ACT_MSK	 |
+	       ADXL372_INT1_MAP_INACT_MSK;
+	ret = adxl372_set_interrupts(st, mask, 0);
 	if (ret < 0)
 		goto err;
 
@@ -1067,7 +1098,9 @@ static int adxl372_dready_trig_set_state(struct iio_trigger *trig,
 	unsigned long int mask = 0;
 
 	if (state)
-		mask = ADXL372_INT1_MAP_FIFO_FULL_MSK;
+		mask = ADXL372_INT1_MAP_FIFO_FULL_MSK |
+		       ADXL372_INT1_MAP_ACT_MSK	 |
+		       ADXL372_INT1_MAP_INACT_MSK;
 
 	return adxl372_set_interrupts(st, mask, 0);
 }
-- 
2.20.1