blob: a9f30a881d33ae6e7037472ef972f2e216f161b3 [file] [log] [blame]
/* ST Microelectronics IIS3DHHC accelerometer sensor
*
* Copyright (c) 2019 STMicroelectronics
*
* SPDX-License-Identifier: Apache-2.0
*
* Datasheet:
* https://www.st.com/resource/en/datasheet/iis3dhhc.pdf
*/
#define DT_DRV_COMPAT st_iis3dhhc
#include <kernel.h>
#include <drivers/sensor.h>
#include <drivers/gpio.h>
#include <logging/log.h>
#include "iis3dhhc.h"
LOG_MODULE_DECLARE(IIS3DHHC, CONFIG_SENSOR_LOG_LEVEL);
/**
* iis3dhhc_enable_int - enable selected int pin to generate interrupt
*/
static int iis3dhhc_enable_int(const struct device *dev, int enable)
{
struct iis3dhhc_data *iis3dhhc = dev->data;
/* set interrupt */
#ifdef CONFIG_IIS3DHHC_DRDY_INT1
return iis3dhhc_drdy_on_int1_set(iis3dhhc->ctx, enable);
#else
return iis3dhhc_drdy_on_int2_set(iis3dhhc->ctx, enable);
#endif
}
/**
* iis3dhhc_trigger_set - link external trigger to event data ready
*/
int iis3dhhc_trigger_set(const struct device *dev,
const struct sensor_trigger *trig,
sensor_trigger_handler_t handler)
{
struct iis3dhhc_data *iis3dhhc = dev->data;
int16_t raw[3];
if (trig->chan == SENSOR_CHAN_ACCEL_XYZ) {
iis3dhhc->handler_drdy = handler;
if (handler) {
/* dummy read: re-trigger interrupt */
iis3dhhc_acceleration_raw_get(iis3dhhc->ctx, raw);
return iis3dhhc_enable_int(dev, PROPERTY_ENABLE);
} else {
return iis3dhhc_enable_int(dev, PROPERTY_DISABLE);
}
}
return -ENOTSUP;
}
/**
* iis3dhhc_handle_interrupt - handle the drdy event
* read data and call handler if registered any
*/
static void iis3dhhc_handle_interrupt(const struct device *dev)
{
struct iis3dhhc_data *iis3dhhc = dev->data;
struct sensor_trigger drdy_trigger = {
.type = SENSOR_TRIG_DATA_READY,
};
const struct iis3dhhc_config *cfg = dev->config;
if (iis3dhhc->handler_drdy != NULL) {
iis3dhhc->handler_drdy(dev, &drdy_trigger);
}
gpio_pin_interrupt_configure(iis3dhhc->gpio, cfg->int_pin,
GPIO_INT_EDGE_TO_ACTIVE);
}
static void iis3dhhc_gpio_callback(const struct device *dev,
struct gpio_callback *cb, uint32_t pins)
{
struct iis3dhhc_data *iis3dhhc =
CONTAINER_OF(cb, struct iis3dhhc_data, gpio_cb);
const struct iis3dhhc_config *cfg = iis3dhhc->dev->config;
ARG_UNUSED(pins);
gpio_pin_interrupt_configure(iis3dhhc->gpio, cfg->int_pin,
GPIO_INT_DISABLE);
#if defined(CONFIG_IIS3DHHC_TRIGGER_OWN_THREAD)
k_sem_give(&iis3dhhc->gpio_sem);
#elif defined(CONFIG_IIS3DHHC_TRIGGER_GLOBAL_THREAD)
k_work_submit(&iis3dhhc->work);
#endif /* CONFIG_IIS3DHHC_TRIGGER_OWN_THREAD */
}
#ifdef CONFIG_IIS3DHHC_TRIGGER_OWN_THREAD
static void iis3dhhc_thread(struct iis3dhhc_data *iis3dhhc)
{
while (1) {
k_sem_take(&iis3dhhc->gpio_sem, K_FOREVER);
iis3dhhc_handle_interrupt(iis3dhhc->dev);
}
}
#endif /* CONFIG_IIS3DHHC_TRIGGER_OWN_THREAD */
#ifdef CONFIG_IIS3DHHC_TRIGGER_GLOBAL_THREAD
static void iis3dhhc_work_cb(struct k_work *work)
{
struct iis3dhhc_data *iis3dhhc =
CONTAINER_OF(work, struct iis3dhhc_data, work);
iis3dhhc_handle_interrupt(iis3dhhc->dev);
}
#endif /* CONFIG_IIS3DHHC_TRIGGER_GLOBAL_THREAD */
int iis3dhhc_init_interrupt(const struct device *dev)
{
struct iis3dhhc_data *iis3dhhc = dev->data;
const struct iis3dhhc_config *cfg = dev->config;
int ret;
/* setup data ready gpio interrupt (INT1 or INT2) */
iis3dhhc->gpio = device_get_binding(cfg->int_port);
if (iis3dhhc->gpio == NULL) {
LOG_DBG("Cannot get pointer to %s device", cfg->int_port);
return -EINVAL;
}
iis3dhhc->dev = dev;
#if defined(CONFIG_IIS3DHHC_TRIGGER_OWN_THREAD)
k_sem_init(&iis3dhhc->gpio_sem, 0, K_SEM_MAX_LIMIT);
k_thread_create(&iis3dhhc->thread, iis3dhhc->thread_stack,
CONFIG_IIS3DHHC_THREAD_STACK_SIZE,
(k_thread_entry_t)iis3dhhc_thread, iis3dhhc,
NULL, NULL, K_PRIO_COOP(CONFIG_IIS3DHHC_THREAD_PRIORITY),
0, K_NO_WAIT);
#elif defined(CONFIG_IIS3DHHC_TRIGGER_GLOBAL_THREAD)
iis3dhhc->work.handler = iis3dhhc_work_cb;
#endif /* CONFIG_IIS3DHHC_TRIGGER_OWN_THREAD */
ret = gpio_pin_configure(iis3dhhc->gpio, cfg->int_pin,
GPIO_INPUT | cfg->int_flags);
if (ret < 0) {
LOG_DBG("Could not configure gpio");
return ret;
}
gpio_init_callback(&iis3dhhc->gpio_cb,
iis3dhhc_gpio_callback,
BIT(cfg->int_pin));
if (gpio_add_callback(iis3dhhc->gpio, &iis3dhhc->gpio_cb) < 0) {
LOG_DBG("Could not set gpio callback");
return -EIO;
}
/* enable interrupt on int1/int2 in pulse mode */
if (iis3dhhc_drdy_notification_mode_set(iis3dhhc->ctx, IIS3DHHC_PULSED)) {
return -EIO;
}
return gpio_pin_interrupt_configure(iis3dhhc->gpio, cfg->int_pin,
GPIO_INT_EDGE_TO_ACTIVE);
}