drivers/sensor/lis2dh/lis2dh_trigger.c - third_party/github/zephyrproject-rtos/zephyr - Git at Google

 /*
  * Copyright (c) 2017 Intel Corporation
  *
  * SPDX-License-Identifier: Apache-2.0
  */

 #include "lis2dh.h"

 #include <misc/util.h>
 #include <kernel.h>

 #define START_TRIG_INT1			BIT(0)
 #define START_TRIG_INT2			BIT(1)
 #define TRIGGED_INT1			BIT(4)
 #define TRIGGED_INT2			BIT(5)

 static int lis2dh_trigger_drdy_set(struct device *dev, enum sensor_channel chan,
 				   sensor_trigger_handler_t handler)
 {
 	struct lis2dh_data *lis2dh = dev->driver_data;
 	int status;

 	gpio_pin_disable_callback(lis2dh->gpio, CONFIG_LIS2DH_INT1_GPIO_PIN);

 	/* cancel potentially pending trigger */
 	atomic_clear_bit(&lis2dh->trig_flags, TRIGGED_INT1);

 	status = lis2dh_reg_field_update(lis2dh->bus, LIS2DH_REG_CTRL3,
 					 LIS2DH_EN_DRDY1_INT1_SHIFT,
 					 LIS2DH_EN_DRDY1_INT1, 0);

 	lis2dh->handler_drdy = handler;
 	if ((handler == NULL) || (status < 0)) {
 		return status;
 	}

 	lis2dh->chan_drdy = chan;

 	/* serialize start of int1 in thread to synchronize output sampling
 	 * and first interrupt. this avoids concurrent bus context access.
 	 */
 	atomic_set_bit(&lis2dh->trig_flags, START_TRIG_INT1);
 #if defined(CONFIG_LIS2DH_TRIGGER_OWN_THREAD)
 	k_sem_give(&lis2dh->gpio_sem);
 #elif defined(CONFIG_LIS2DH_TRIGGER_GLOBAL_THREAD)
 	k_work_submit(&lis2dh->work);
 #endif

 	return 0;
 }

 static int lis2dh_start_trigger_int1(const struct lis2dh_data *lis2dh)
 {
 	int status;
 	u8_t raw[LIS2DH_BUF_SZ];
 	u8_t ctrl1 = 0;

 	/* power down temporarly to align interrupt & data output sampling */
 	status = lis2dh_reg_read_byte(lis2dh->bus, LIS2DH_REG_CTRL1, &ctrl1);
 	if (unlikely(status < 0)) {
 		return status;
 	}
 	status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_CTRL1,
 				       ctrl1 & ~LIS2DH_ODR_MASK);
 	if (unlikely(status < 0)) {
 		return status;
 	}

 	SYS_LOG_DBG("ctrl1=0x%x @tick=%u", ctrl1, k_cycle_get_32());

 	/* empty output data */
 	status = lis2dh_burst_read(lis2dh->bus, LIS2DH_REG_STATUS, raw,
 				   sizeof(raw));
 	if (unlikely(status < 0)) {
 		return status;
 	}

 	gpio_pin_enable_callback(lis2dh->gpio, CONFIG_LIS2DH_INT1_GPIO_PIN);

 	/* re-enable output sampling */
 	status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_CTRL1, ctrl1);
 	if (unlikely(status < 0)) {
 		return status;
 	}

 	return lis2dh_reg_field_update(lis2dh->bus, LIS2DH_REG_CTRL3,
 				       LIS2DH_EN_DRDY1_INT1_SHIFT,
 				       LIS2DH_EN_DRDY1_INT1, 1);
 }

 #define LIS2DH_ANYM_CFG (LIS2DH_INT_CFG_ZHIE_ZUPE | LIS2DH_INT_CFG_YHIE_YUPE |\
 			 LIS2DH_INT_CFG_XHIE_XUPE)

 static int lis2dh_trigger_anym_set(struct device *dev,
 				   sensor_trigger_handler_t handler)
 {
 	struct lis2dh_data *lis2dh = dev->driver_data;
 	int status;
 	u8_t reg_val;

 	gpio_pin_disable_callback(lis2dh->gpio, CONFIG_LIS2DH_INT2_GPIO_PIN);

 	/* cancel potentially pending trigger */
 	atomic_clear_bit(&lis2dh->trig_flags, TRIGGED_INT2);

 	/* disable all interrupt 2 events */
 	status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_INT2_CFG, 0);

 	/* make sure any pending interrupt is cleared */
 	status = lis2dh_reg_read_byte(lis2dh->bus, LIS2DH_REG_INT2_SRC,
 				      &reg_val);

 	lis2dh->handler_anymotion = handler;
 	if ((handler == NULL) || (status < 0)) {
 		return status;
 	}

 	/* serialize start of int2 in thread to synchronize output sampling
 	 * and first interrupt. this avoids concurrent bus context access.
 	 */
 	atomic_set_bit(&lis2dh->trig_flags, START_TRIG_INT2);
 #if defined(CONFIG_LIS2DH_TRIGGER_OWN_THREAD)
 	k_sem_give(&lis2dh->gpio_sem);
 #elif defined(CONFIG_LIS2DH_TRIGGER_GLOBAL_THREAD)
 	k_work_submit(&lis2dh->work);
 #endif
 	return 0;
 }

 static int lis2dh_start_trigger_int2(const struct lis2dh_data *lis2dh)
 {
 	int status;

 	status = gpio_pin_enable_callback(lis2dh->gpio,
 					  CONFIG_LIS2DH_INT2_GPIO_PIN);
 	if (unlikely(status < 0)) {
 		SYS_LOG_ERR("enable callback failed err=%d", status);
 	}

 	return lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_INT2_CFG,
 				     LIS2DH_ANYM_CFG);
 }

 int lis2dh_trigger_set(struct device *dev,
 		       const struct sensor_trigger *trig,
 		       sensor_trigger_handler_t handler)
 {
 	if (trig->type == SENSOR_TRIG_DATA_READY &&
 	    trig->chan == SENSOR_CHAN_ACCEL_XYZ) {
 		return lis2dh_trigger_drdy_set(dev, trig->chan, handler);
 	} else if (trig->type == SENSOR_TRIG_DELTA) {
 		return lis2dh_trigger_anym_set(dev, handler);
 	}

 	return -ENOTSUP;
 }

 int lis2dh_acc_slope_config(struct device *dev, enum sensor_attribute attr,
 			    const struct sensor_value *val)
 {
 	struct lis2dh_data *lis2dh = dev->driver_data;
 	int status;

 	if (attr == SENSOR_ATTR_SLOPE_TH) {
 		u8_t range_g, reg_val;
 		u32_t slope_th_ums2;

 		status = lis2dh_reg_read_byte(lis2dh->bus, LIS2DH_REG_CTRL4,
 					      &reg_val);
 		if (status < 0) {
 			return status;
 		}

 		/* fs reg value is in the range 0 (2g) - 3 (16g) */
 		range_g = 2 * (1 << ((LIS2DH_FS_MASK & reg_val)
 				      >> LIS2DH_FS_SHIFT));

 		slope_th_ums2 = val->val1 * 1000000 + val->val2;

 		/* make sure the provided threshold does not exceed range */
 		if ((slope_th_ums2 - 1) > (range_g * SENSOR_G)) {
 			return -EINVAL;
 		}

 		/* 7 bit full range value */
 		reg_val = 128 / range_g * (slope_th_ums2 - 1) / SENSOR_G;

 		SYS_LOG_INF("int2_ths=0x%x range_g=%d ums2=%u", reg_val,
 			    range_g, slope_th_ums2 - 1);

 		status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_INT2_THS,
 					       reg_val);
 	} else { /* SENSOR_ATTR_SLOPE_DUR */
 		/*
 		 * slope duration is measured in number of samples:
 		 * N/ODR where N is the register value
 		 */
 		if (val->val1 < 0 || val->val1 > 127) {
 			return -ENOTSUP;
 		}

 		SYS_LOG_INF("int2_dur=0x%x", val->val1);

 		status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_INT2_DUR,
 					       val->val1);
 	}

 	return status;
 }

 static void lis2dh_gpio_int1_callback(struct device *dev,
 				      struct gpio_callback *cb, u32_t pins)
 {
 	struct lis2dh_data *lis2dh =
 		CONTAINER_OF(cb, struct lis2dh_data, gpio_int1_cb);

 	ARG_UNUSED(pins);

 	atomic_set_bit(&lis2dh->trig_flags, TRIGGED_INT1);

 #if defined(CONFIG_LIS2DH_TRIGGER_OWN_THREAD)
 	k_sem_give(&lis2dh->gpio_sem);
 #elif defined(CONFIG_LIS2DH_TRIGGER_GLOBAL_THREAD)
 	k_work_submit(&lis2dh->work);
 #endif
 }

 static void lis2dh_gpio_int2_callback(struct device *dev,
 				      struct gpio_callback *cb, u32_t pins)
 {
 	struct lis2dh_data *lis2dh =
 		CONTAINER_OF(cb, struct lis2dh_data, gpio_int2_cb);

 	ARG_UNUSED(pins);

 	atomic_set_bit(&lis2dh->trig_flags, TRIGGED_INT2);

 #if defined(CONFIG_LIS2DH_TRIGGER_OWN_THREAD)
 	k_sem_give(&lis2dh->gpio_sem);
 #elif defined(CONFIG_LIS2DH_TRIGGER_GLOBAL_THREAD)
 	k_work_submit(&lis2dh->work);
 #endif
 }

 static void lis2dh_thread_cb(void *arg)
 {
 	struct device *dev = arg;
 	struct lis2dh_data *lis2dh = dev->driver_data;

 	if (unlikely(atomic_test_and_clear_bit(&lis2dh->trig_flags,
 		     START_TRIG_INT1))) {
 		int status = lis2dh_start_trigger_int1(lis2dh);

 		if (unlikely(status < 0)) {
 			SYS_LOG_ERR("lis2dh_start_trigger_int1: %d", status);
 		}
 		return;
 	}

 	if (unlikely(atomic_test_and_clear_bit(&lis2dh->trig_flags,
 		     START_TRIG_INT2))) {
 		int status = lis2dh_start_trigger_int2(lis2dh);

 		if (unlikely(status < 0)) {
 			SYS_LOG_ERR("lis2dh_start_trigger_int2: %d", status);
 		}
 		return;
 	}

 	if (atomic_test_and_clear_bit(&lis2dh->trig_flags,
 				      TRIGGED_INT1)) {
 		struct sensor_trigger drdy_trigger = {
 			.type = SENSOR_TRIG_DATA_READY,
 			.chan = lis2dh->chan_drdy,
 		};

 		if (likely(lis2dh->handler_drdy != NULL)) {
 			lis2dh->handler_drdy(dev, &drdy_trigger);
 		}

 		return;
 	}

 	if (atomic_test_and_clear_bit(&lis2dh->trig_flags,
 				      TRIGGED_INT2)) {
 		struct sensor_trigger anym_trigger = {
 			.type = SENSOR_TRIG_DELTA,
 			.chan = lis2dh->chan_drdy,
 		};
 		u8_t reg_val;

 		/* clear interrupt 2 to de-assert int2 line */
 		lis2dh_reg_read_byte(lis2dh->bus, LIS2DH_REG_INT2_SRC,
 				     &reg_val);

 		if (likely(lis2dh->handler_anymotion != NULL)) {
 			lis2dh->handler_anymotion(dev, &anym_trigger);
 		}

 		SYS_LOG_DBG("@tick=%u int2_src=0x%x", k_cycle_get_32(),
 			    reg_val);

 		return;
 	}
 }

 #ifdef CONFIG_LIS2DH_TRIGGER_OWN_THREAD
 static void lis2dh_thread(void *arg1, void *unused2, void *unused3)
 {
 	struct device *dev = arg1;
 	struct lis2dh_data *lis2dh = dev->driver_data;

 	ARG_UNUSED(unused2);
 	ARG_UNUSED(unused3);

 	while (1) {
 		k_sem_take(&lis2dh->gpio_sem, K_FOREVER);
 		lis2dh_thread_cb(dev);
 	}
 }
 #endif

 #ifdef CONFIG_LIS2DH_TRIGGER_GLOBAL_THREAD
 static void lis2dh_work_cb(struct k_work *work)
 {
 	struct lis2dh_data *lis2dh =
 		CONTAINER_OF(work, struct lis2dh_data, work);

 	lis2dh_thread_cb(lis2dh->dev);
 }
 #endif

 #define LIS2DH_INT1_CFG			(GPIO_DIR_IN | GPIO_INT |\
 					 GPIO_INT_EDGE | GPIO_INT_ACTIVE_HIGH)

 #define LIS2DH_INT2_CFG			(GPIO_DIR_IN | GPIO_INT |\
 					 GPIO_INT_EDGE | GPIO_INT_ACTIVE_HIGH)

 int lis2dh_init_interrupt(struct device *dev)
 {
 	struct lis2dh_data *lis2dh = dev->driver_data;
 	int status;
 	u8_t raw[LIS2DH_DATA_OFS + 2];

 	/* setup data ready gpio interrupt */
 	lis2dh->gpio = device_get_binding(CONFIG_LIS2DH_GPIO_DEV_NAME);
 	if (lis2dh->gpio == NULL) {
 		SYS_LOG_ERR("Cannot get pointer to %s device",
 			    CONFIG_LIS2DH_GPIO_DEV_NAME);
 		return -EINVAL;
 	}

 	/* data ready int1 gpio configuration */
 	status = gpio_pin_configure(lis2dh->gpio, CONFIG_LIS2DH_INT1_GPIO_PIN,
 				    LIS2DH_INT1_CFG);
 	if (status < 0) {
 		SYS_LOG_ERR("Could not configure gpio %d",
 			     CONFIG_LIS2DH_INT1_GPIO_PIN);
 		return status;
 	}

 	gpio_init_callback(&lis2dh->gpio_int1_cb,
 			   lis2dh_gpio_int1_callback,
 			   BIT(CONFIG_LIS2DH_INT1_GPIO_PIN));

 	status = gpio_add_callback(lis2dh->gpio, &lis2dh->gpio_int1_cb);
 	if (status < 0) {
 		SYS_LOG_ERR("Could not add gpio int1 callback");
 		return status;
 	}

 	/* any motion int2 gpio configuration */
 	status = gpio_pin_configure(lis2dh->gpio, CONFIG_LIS2DH_INT2_GPIO_PIN,
 				    LIS2DH_INT2_CFG);
 	if (status < 0) {
 		SYS_LOG_ERR("Could not configure gpio %d",
 			     CONFIG_LIS2DH_INT2_GPIO_PIN);
 		return status;
 	}

 	gpio_init_callback(&lis2dh->gpio_int2_cb,
 			   lis2dh_gpio_int2_callback,
 			   BIT(CONFIG_LIS2DH_INT2_GPIO_PIN));

 	/* callback is going to be enabled by trigger setting function */
 	status = gpio_add_callback(lis2dh->gpio, &lis2dh->gpio_int2_cb);
 	if (status < 0) {
 		SYS_LOG_ERR("Could not add gpio int2 callback (%d)", status);
 		return status;
 	}

 #if defined(CONFIG_LIS2DH_TRIGGER_OWN_THREAD)
 	k_sem_init(&lis2dh->gpio_sem, 0, UINT_MAX);

 	k_thread_create(&lis2dh->thread, lis2dh->thread_stack,
 			CONFIG_LIS2DH_THREAD_STACK_SIZE,
 			(k_thread_entry_t)lis2dh_thread, dev, NULL, NULL,
 			K_PRIO_COOP(CONFIG_LIS2DH_THREAD_PRIORITY), 0, 0);
 #elif defined(CONFIG_LIS2DH_TRIGGER_GLOBAL_THREAD)
 	lis2dh->work.handler = lis2dh_work_cb;
 	lis2dh->dev = dev;
 #endif
 	/* disable interrupt 2 in case of warm (re)boot */
 	status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_INT2_CFG, 0);
 	if (status < 0) {
 		SYS_LOG_ERR("Interrupt 2 disable reg write failed (%d)",
 			    status);
 		return status;
 	}

 	memset(raw, 0, sizeof(raw));
 	status = lis2dh_burst_write(lis2dh->bus, LIS2DH_REG_INT2_THS, raw,
 				    sizeof(raw));
 	if (status < 0) {
 		SYS_LOG_ERR("Burst write to INT2 THS failed (%d)", status);
 		return status;
 	}

 	/* latch int2 line interrupt */
 	status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_CTRL5,
 				       LIS2DH_EN_LIR_INT2);
 	if (status < 0) {
 		SYS_LOG_ERR("INT2 latch enable reg write failed (%d)", status);
 		return status;
 	}

 	SYS_LOG_INF("int1 on pin=%d cfg=0x%x, int2 on pin=%d cfg=0x%x",
 		    CONFIG_LIS2DH_INT1_GPIO_PIN, LIS2DH_INT1_CFG,
 		    CONFIG_LIS2DH_INT2_GPIO_PIN, LIS2DH_INT2_CFG);

 	/* enable interrupt 2 on int2 line */
 	return lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_CTRL6,
 				     LIS2DH_EN_INT2_INT2);
 }
	/*
	* Copyright (c) 2017 Intel Corporation
	*
	* SPDX-License-Identifier: Apache-2.0
	*/

	#include "lis2dh.h"

	#include <misc/util.h>
	#include <kernel.h>

	#define START_TRIG_INT1 BIT(0)
	#define START_TRIG_INT2 BIT(1)
	#define TRIGGED_INT1 BIT(4)
	#define TRIGGED_INT2 BIT(5)

	static int lis2dh_trigger_drdy_set(struct device *dev, enum sensor_channel chan,
	sensor_trigger_handler_t handler)
	{
	struct lis2dh_data *lis2dh = dev->driver_data;
	int status;

	gpio_pin_disable_callback(lis2dh->gpio, CONFIG_LIS2DH_INT1_GPIO_PIN);

	/* cancel potentially pending trigger */
	atomic_clear_bit(&lis2dh->trig_flags, TRIGGED_INT1);

	status = lis2dh_reg_field_update(lis2dh->bus, LIS2DH_REG_CTRL3,
	LIS2DH_EN_DRDY1_INT1_SHIFT,
	LIS2DH_EN_DRDY1_INT1, 0);

	lis2dh->handler_drdy = handler;
	if ((handler == NULL) \|\| (status < 0)) {
	return status;
	}

	lis2dh->chan_drdy = chan;

	/* serialize start of int1 in thread to synchronize output sampling
	* and first interrupt. this avoids concurrent bus context access.
	*/
	atomic_set_bit(&lis2dh->trig_flags, START_TRIG_INT1);
	#if defined(CONFIG_LIS2DH_TRIGGER_OWN_THREAD)
	k_sem_give(&lis2dh->gpio_sem);
	#elif defined(CONFIG_LIS2DH_TRIGGER_GLOBAL_THREAD)
	k_work_submit(&lis2dh->work);
	#endif

	return 0;
	}

	static int lis2dh_start_trigger_int1(const struct lis2dh_data *lis2dh)
	{
	int status;
	u8_t raw[LIS2DH_BUF_SZ];
	u8_t ctrl1 = 0;

	/* power down temporarly to align interrupt & data output sampling */
	status = lis2dh_reg_read_byte(lis2dh->bus, LIS2DH_REG_CTRL1, &ctrl1);
	if (unlikely(status < 0)) {
	return status;
	}
	status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_CTRL1,
	ctrl1 & ~LIS2DH_ODR_MASK);
	if (unlikely(status < 0)) {
	return status;
	}

	SYS_LOG_DBG("ctrl1=0x%x @tick=%u", ctrl1, k_cycle_get_32());

	/* empty output data */
	status = lis2dh_burst_read(lis2dh->bus, LIS2DH_REG_STATUS, raw,
	sizeof(raw));
	if (unlikely(status < 0)) {
	return status;
	}

	gpio_pin_enable_callback(lis2dh->gpio, CONFIG_LIS2DH_INT1_GPIO_PIN);

	/* re-enable output sampling */
	status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_CTRL1, ctrl1);
	if (unlikely(status < 0)) {
	return status;
	}

	return lis2dh_reg_field_update(lis2dh->bus, LIS2DH_REG_CTRL3,
	LIS2DH_EN_DRDY1_INT1_SHIFT,
	LIS2DH_EN_DRDY1_INT1, 1);
	}

	#define LIS2DH_ANYM_CFG (LIS2DH_INT_CFG_ZHIE_ZUPE \| LIS2DH_INT_CFG_YHIE_YUPE \|\
	LIS2DH_INT_CFG_XHIE_XUPE)

	static int lis2dh_trigger_anym_set(struct device *dev,
	sensor_trigger_handler_t handler)
	{
	struct lis2dh_data *lis2dh = dev->driver_data;
	int status;
	u8_t reg_val;

	gpio_pin_disable_callback(lis2dh->gpio, CONFIG_LIS2DH_INT2_GPIO_PIN);

	/* cancel potentially pending trigger */
	atomic_clear_bit(&lis2dh->trig_flags, TRIGGED_INT2);

	/* disable all interrupt 2 events */
	status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_INT2_CFG, 0);

	/* make sure any pending interrupt is cleared */
	status = lis2dh_reg_read_byte(lis2dh->bus, LIS2DH_REG_INT2_SRC,
	&reg_val);

	lis2dh->handler_anymotion = handler;
	if ((handler == NULL) \|\| (status < 0)) {
	return status;
	}

	/* serialize start of int2 in thread to synchronize output sampling
	* and first interrupt. this avoids concurrent bus context access.
	*/
	atomic_set_bit(&lis2dh->trig_flags, START_TRIG_INT2);
	#if defined(CONFIG_LIS2DH_TRIGGER_OWN_THREAD)
	k_sem_give(&lis2dh->gpio_sem);
	#elif defined(CONFIG_LIS2DH_TRIGGER_GLOBAL_THREAD)
	k_work_submit(&lis2dh->work);
	#endif
	return 0;
	}

	static int lis2dh_start_trigger_int2(const struct lis2dh_data *lis2dh)
	{
	int status;

	status = gpio_pin_enable_callback(lis2dh->gpio,
	CONFIG_LIS2DH_INT2_GPIO_PIN);
	if (unlikely(status < 0)) {
	SYS_LOG_ERR("enable callback failed err=%d", status);
	}

	return lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_INT2_CFG,
	LIS2DH_ANYM_CFG);
	}

	int lis2dh_trigger_set(struct device *dev,
	const struct sensor_trigger *trig,
	sensor_trigger_handler_t handler)
	{
	if (trig->type == SENSOR_TRIG_DATA_READY &&
	trig->chan == SENSOR_CHAN_ACCEL_XYZ) {
	return lis2dh_trigger_drdy_set(dev, trig->chan, handler);
	} else if (trig->type == SENSOR_TRIG_DELTA) {
	return lis2dh_trigger_anym_set(dev, handler);
	}

	return -ENOTSUP;
	}

	int lis2dh_acc_slope_config(struct device *dev, enum sensor_attribute attr,
	const struct sensor_value *val)
	{
	struct lis2dh_data *lis2dh = dev->driver_data;
	int status;

	if (attr == SENSOR_ATTR_SLOPE_TH) {
	u8_t range_g, reg_val;
	u32_t slope_th_ums2;

	status = lis2dh_reg_read_byte(lis2dh->bus, LIS2DH_REG_CTRL4,
	&reg_val);
	if (status < 0) {
	return status;
	}

	/* fs reg value is in the range 0 (2g) - 3 (16g) */
	range_g = 2 * (1 << ((LIS2DH_FS_MASK & reg_val)
	>> LIS2DH_FS_SHIFT));

	slope_th_ums2 = val->val1 * 1000000 + val->val2;

	/* make sure the provided threshold does not exceed range */
	if ((slope_th_ums2 - 1) > (range_g * SENSOR_G)) {
	return -EINVAL;
	}

	/* 7 bit full range value */
	reg_val = 128 / range_g * (slope_th_ums2 - 1) / SENSOR_G;

	SYS_LOG_INF("int2_ths=0x%x range_g=%d ums2=%u", reg_val,
	range_g, slope_th_ums2 - 1);

	status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_INT2_THS,
	reg_val);
	} else { /* SENSOR_ATTR_SLOPE_DUR */
	/*
	* slope duration is measured in number of samples:
	* N/ODR where N is the register value
	*/
	if (val->val1 < 0 \|\| val->val1 > 127) {
	return -ENOTSUP;
	}

	SYS_LOG_INF("int2_dur=0x%x", val->val1);

	status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_INT2_DUR,
	val->val1);
	}

	return status;
	}

	static void lis2dh_gpio_int1_callback(struct device *dev,
	struct gpio_callback *cb, u32_t pins)
	{
	struct lis2dh_data *lis2dh =
	CONTAINER_OF(cb, struct lis2dh_data, gpio_int1_cb);

	ARG_UNUSED(pins);

	atomic_set_bit(&lis2dh->trig_flags, TRIGGED_INT1);

	#if defined(CONFIG_LIS2DH_TRIGGER_OWN_THREAD)
	k_sem_give(&lis2dh->gpio_sem);
	#elif defined(CONFIG_LIS2DH_TRIGGER_GLOBAL_THREAD)
	k_work_submit(&lis2dh->work);
	#endif
	}

	static void lis2dh_gpio_int2_callback(struct device *dev,
	struct gpio_callback *cb, u32_t pins)
	{
	struct lis2dh_data *lis2dh =
	CONTAINER_OF(cb, struct lis2dh_data, gpio_int2_cb);

	ARG_UNUSED(pins);

	atomic_set_bit(&lis2dh->trig_flags, TRIGGED_INT2);

	#if defined(CONFIG_LIS2DH_TRIGGER_OWN_THREAD)
	k_sem_give(&lis2dh->gpio_sem);
	#elif defined(CONFIG_LIS2DH_TRIGGER_GLOBAL_THREAD)
	k_work_submit(&lis2dh->work);
	#endif
	}

	static void lis2dh_thread_cb(void *arg)
	{
	struct device *dev = arg;
	struct lis2dh_data *lis2dh = dev->driver_data;

	if (unlikely(atomic_test_and_clear_bit(&lis2dh->trig_flags,
	START_TRIG_INT1))) {
	int status = lis2dh_start_trigger_int1(lis2dh);

	if (unlikely(status < 0)) {
	SYS_LOG_ERR("lis2dh_start_trigger_int1: %d", status);
	}
	return;
	}

	if (unlikely(atomic_test_and_clear_bit(&lis2dh->trig_flags,
	START_TRIG_INT2))) {
	int status = lis2dh_start_trigger_int2(lis2dh);

	if (unlikely(status < 0)) {
	SYS_LOG_ERR("lis2dh_start_trigger_int2: %d", status);
	}
	return;
	}

	if (atomic_test_and_clear_bit(&lis2dh->trig_flags,
	TRIGGED_INT1)) {
	struct sensor_trigger drdy_trigger = {
	.type = SENSOR_TRIG_DATA_READY,
	.chan = lis2dh->chan_drdy,
	};

	if (likely(lis2dh->handler_drdy != NULL)) {
	lis2dh->handler_drdy(dev, &drdy_trigger);
	}

	return;
	}

	if (atomic_test_and_clear_bit(&lis2dh->trig_flags,
	TRIGGED_INT2)) {
	struct sensor_trigger anym_trigger = {
	.type = SENSOR_TRIG_DELTA,
	.chan = lis2dh->chan_drdy,
	};
	u8_t reg_val;

	/* clear interrupt 2 to de-assert int2 line */
	lis2dh_reg_read_byte(lis2dh->bus, LIS2DH_REG_INT2_SRC,
	&reg_val);

	if (likely(lis2dh->handler_anymotion != NULL)) {
	lis2dh->handler_anymotion(dev, &anym_trigger);
	}

	SYS_LOG_DBG("@tick=%u int2_src=0x%x", k_cycle_get_32(),
	reg_val);

	return;
	}
	}

	#ifdef CONFIG_LIS2DH_TRIGGER_OWN_THREAD
	static void lis2dh_thread(void arg1, void unused2, void *unused3)
	{
	struct device *dev = arg1;
	struct lis2dh_data *lis2dh = dev->driver_data;

	ARG_UNUSED(unused2);
	ARG_UNUSED(unused3);

	while (1) {
	k_sem_take(&lis2dh->gpio_sem, K_FOREVER);
	lis2dh_thread_cb(dev);
	}
	}
	#endif

	#ifdef CONFIG_LIS2DH_TRIGGER_GLOBAL_THREAD
	static void lis2dh_work_cb(struct k_work *work)
	{
	struct lis2dh_data *lis2dh =
	CONTAINER_OF(work, struct lis2dh_data, work);

	lis2dh_thread_cb(lis2dh->dev);
	}
	#endif

	#define LIS2DH_INT1_CFG (GPIO_DIR_IN \| GPIO_INT \|\
	GPIO_INT_EDGE \| GPIO_INT_ACTIVE_HIGH)

	#define LIS2DH_INT2_CFG (GPIO_DIR_IN \| GPIO_INT \|\
	GPIO_INT_EDGE \| GPIO_INT_ACTIVE_HIGH)

	int lis2dh_init_interrupt(struct device *dev)
	{
	struct lis2dh_data *lis2dh = dev->driver_data;
	int status;
	u8_t raw[LIS2DH_DATA_OFS + 2];

	/* setup data ready gpio interrupt */
	lis2dh->gpio = device_get_binding(CONFIG_LIS2DH_GPIO_DEV_NAME);
	if (lis2dh->gpio == NULL) {
	SYS_LOG_ERR("Cannot get pointer to %s device",
	CONFIG_LIS2DH_GPIO_DEV_NAME);
	return -EINVAL;
	}

	/* data ready int1 gpio configuration */
	status = gpio_pin_configure(lis2dh->gpio, CONFIG_LIS2DH_INT1_GPIO_PIN,
	LIS2DH_INT1_CFG);
	if (status < 0) {
	SYS_LOG_ERR("Could not configure gpio %d",
	CONFIG_LIS2DH_INT1_GPIO_PIN);
	return status;
	}

	gpio_init_callback(&lis2dh->gpio_int1_cb,
	lis2dh_gpio_int1_callback,
	BIT(CONFIG_LIS2DH_INT1_GPIO_PIN));

	status = gpio_add_callback(lis2dh->gpio, &lis2dh->gpio_int1_cb);
	if (status < 0) {
	SYS_LOG_ERR("Could not add gpio int1 callback");
	return status;
	}

	/* any motion int2 gpio configuration */
	status = gpio_pin_configure(lis2dh->gpio, CONFIG_LIS2DH_INT2_GPIO_PIN,
	LIS2DH_INT2_CFG);
	if (status < 0) {
	SYS_LOG_ERR("Could not configure gpio %d",
	CONFIG_LIS2DH_INT2_GPIO_PIN);
	return status;
	}

	gpio_init_callback(&lis2dh->gpio_int2_cb,
	lis2dh_gpio_int2_callback,
	BIT(CONFIG_LIS2DH_INT2_GPIO_PIN));

	/* callback is going to be enabled by trigger setting function */
	status = gpio_add_callback(lis2dh->gpio, &lis2dh->gpio_int2_cb);
	if (status < 0) {
	SYS_LOG_ERR("Could not add gpio int2 callback (%d)", status);
	return status;
	}

	#if defined(CONFIG_LIS2DH_TRIGGER_OWN_THREAD)
	k_sem_init(&lis2dh->gpio_sem, 0, UINT_MAX);

	k_thread_create(&lis2dh->thread, lis2dh->thread_stack,
	CONFIG_LIS2DH_THREAD_STACK_SIZE,
	(k_thread_entry_t)lis2dh_thread, dev, NULL, NULL,
	K_PRIO_COOP(CONFIG_LIS2DH_THREAD_PRIORITY), 0, 0);
	#elif defined(CONFIG_LIS2DH_TRIGGER_GLOBAL_THREAD)
	lis2dh->work.handler = lis2dh_work_cb;
	lis2dh->dev = dev;
	#endif
	/* disable interrupt 2 in case of warm (re)boot */
	status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_INT2_CFG, 0);
	if (status < 0) {
	SYS_LOG_ERR("Interrupt 2 disable reg write failed (%d)",
	status);
	return status;
	}

	memset(raw, 0, sizeof(raw));
	status = lis2dh_burst_write(lis2dh->bus, LIS2DH_REG_INT2_THS, raw,
	sizeof(raw));
	if (status < 0) {
	SYS_LOG_ERR("Burst write to INT2 THS failed (%d)", status);
	return status;
	}

	/* latch int2 line interrupt */
	status = lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_CTRL5,
	LIS2DH_EN_LIR_INT2);
	if (status < 0) {
	SYS_LOG_ERR("INT2 latch enable reg write failed (%d)", status);
	return status;
	}

	SYS_LOG_INF("int1 on pin=%d cfg=0x%x, int2 on pin=%d cfg=0x%x",
	CONFIG_LIS2DH_INT1_GPIO_PIN, LIS2DH_INT1_CFG,
	CONFIG_LIS2DH_INT2_GPIO_PIN, LIS2DH_INT2_CFG);

	/* enable interrupt 2 on int2 line */
	return lis2dh_reg_write_byte(lis2dh->bus, LIS2DH_REG_CTRL6,
	LIS2DH_EN_INT2_INT2);
	}