blob: d2edbad3e2b4fb5100f31f2d170a2dd2bfe7d072 [file] [log] [blame]
/* ST Microelectronics LIS2DU12 3-axis accelerometer sensor driver
*
* Copyright (c) 2023 STMicroelectronics
*
* SPDX-License-Identifier: Apache-2.0
*
* Datasheet:
* https://www.st.com/resource/en/datasheet/lis2du12.pdf
*/
#define DT_DRV_COMPAT st_lis2du12
#include <zephyr/kernel.h>
#include <zephyr/drivers/sensor.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/logging/log.h>
#include "lis2du12.h"
LOG_MODULE_DECLARE(LIS2DU12, CONFIG_SENSOR_LOG_LEVEL);
/**
* lis2du12_enable_xl_int - XL enable selected int pin to generate interrupt
*/
static int lis2du12_enable_xl_int(const struct device *dev, int enable)
{
const struct lis2du12_config *cfg = dev->config;
stmdev_ctx_t *ctx = (stmdev_ctx_t *)&cfg->ctx;
int ret;
if (enable) {
lis2du12_md_t md;
lis2du12_data_t xl_data;
/* dummy read: re-trigger interrupt */
md.fs = cfg->accel_range;
lis2du12_data_get(ctx, &md, &xl_data);
}
/* set interrupt */
if (cfg->drdy_pin == 1) {
lis2du12_pin_int_route_t val;
ret = lis2du12_pin_int1_route_get(ctx, &val);
if (ret < 0) {
LOG_ERR("pint_int1_route_get error");
return ret;
}
val.drdy_xl = 1;
ret = lis2du12_pin_int1_route_set(ctx, &val);
} else {
lis2du12_pin_int_route_t val;
ret = lis2du12_pin_int2_route_get(ctx, &val);
if (ret < 0) {
LOG_ERR("pint_int2_route_get error");
return ret;
}
val.drdy_xl = 1;
ret = lis2du12_pin_int2_route_set(ctx, &val);
}
return ret;
}
/**
* lis2du12_trigger_set - link external trigger to event data ready
*/
int lis2du12_trigger_set(const struct device *dev,
const struct sensor_trigger *trig,
sensor_trigger_handler_t handler)
{
const struct lis2du12_config *cfg = dev->config;
struct lis2du12_data *lis2du12 = dev->data;
if (!cfg->trig_enabled) {
LOG_ERR("trigger_set op not supported");
return -ENOTSUP;
}
switch (trig->chan) {
case SENSOR_CHAN_ACCEL_XYZ:
lis2du12->handler_drdy_acc = handler;
lis2du12->trig_drdy_acc = trig;
if (handler) {
return lis2du12_enable_xl_int(dev, LIS2DU12_EN_BIT);
}
return lis2du12_enable_xl_int(dev, LIS2DU12_DIS_BIT);
default:
return -ENOTSUP;
}
}
/**
* lis2du12_handle_interrupt - handle the drdy event
* read data and call handler if registered any
*/
static void lis2du12_handle_interrupt(const struct device *dev)
{
struct lis2du12_data *lis2du12 = dev->data;
const struct lis2du12_config *cfg = dev->config;
stmdev_ctx_t *ctx = (stmdev_ctx_t *)&cfg->ctx;
lis2du12_status_t status;
while (1) {
if (lis2du12_status_get(ctx, &status) < 0) {
LOG_ERR("failed reading status reg");
return;
}
if (status.drdy_xl == 0) {
break;
}
if ((status.drdy_xl) && (lis2du12->handler_drdy_acc != NULL)) {
lis2du12->handler_drdy_acc(dev, lis2du12->trig_drdy_acc);
}
}
gpio_pin_interrupt_configure_dt(lis2du12->drdy_gpio,
GPIO_INT_EDGE_TO_ACTIVE);
}
static void lis2du12_gpio_callback(const struct device *dev,
struct gpio_callback *cb, uint32_t pins)
{
struct lis2du12_data *lis2du12 =
CONTAINER_OF(cb, struct lis2du12_data, gpio_cb);
ARG_UNUSED(pins);
gpio_pin_interrupt_configure_dt(lis2du12->drdy_gpio, GPIO_INT_DISABLE);
#if defined(CONFIG_LIS2DU12_TRIGGER_OWN_THREAD)
k_sem_give(&lis2du12->gpio_sem);
#elif defined(CONFIG_LIS2DU12_TRIGGER_GLOBAL_THREAD)
k_work_submit(&lis2du12->work);
#endif /* CONFIG_LIS2DU12_TRIGGER_OWN_THREAD */
}
#ifdef CONFIG_LIS2DU12_TRIGGER_OWN_THREAD
static void lis2du12_thread(struct lis2du12_data *lis2du12)
{
while (1) {
k_sem_take(&lis2du12->gpio_sem, K_FOREVER);
lis2du12_handle_interrupt(lis2du12->dev);
}
}
#endif /* CONFIG_LIS2DU12_TRIGGER_OWN_THREAD */
#ifdef CONFIG_LIS2DU12_TRIGGER_GLOBAL_THREAD
static void lis2du12_work_cb(struct k_work *work)
{
struct lis2du12_data *lis2du12 =
CONTAINER_OF(work, struct lis2du12_data, work);
lis2du12_handle_interrupt(lis2du12->dev);
}
#endif /* CONFIG_LIS2DU12_TRIGGER_GLOBAL_THREAD */
int lis2du12_init_interrupt(const struct device *dev)
{
struct lis2du12_data *lis2du12 = dev->data;
const struct lis2du12_config *cfg = dev->config;
int ret;
lis2du12->drdy_gpio = (cfg->drdy_pin == 1) ?
(struct gpio_dt_spec *)&cfg->int1_gpio :
(struct gpio_dt_spec *)&cfg->int2_gpio;
/* setup data ready gpio interrupt (INT1 or INT2) */
if (!gpio_is_ready_dt(lis2du12->drdy_gpio)) {
LOG_ERR("Cannot get pointer to drdy_gpio device (%p)",
lis2du12->drdy_gpio);
return -EINVAL;
}
#if defined(CONFIG_LIS2DU12_TRIGGER_OWN_THREAD)
k_sem_init(&lis2du12->gpio_sem, 0, K_SEM_MAX_LIMIT);
k_thread_create(&lis2du12->thread, lis2du12->thread_stack,
CONFIG_LIS2DU12_THREAD_STACK_SIZE,
(k_thread_entry_t)lis2du12_thread, lis2du12,
NULL, NULL, K_PRIO_COOP(CONFIG_LIS2DU12_THREAD_PRIORITY),
0, K_NO_WAIT);
k_thread_name_set(&lis2du12->thread, dev->name);
#elif defined(CONFIG_LIS2DU12_TRIGGER_GLOBAL_THREAD)
lis2du12->work.handler = lis2du12_work_cb;
#endif /* CONFIG_LIS2DU12_TRIGGER_OWN_THREAD */
ret = gpio_pin_configure_dt(lis2du12->drdy_gpio, GPIO_INPUT);
if (ret < 0) {
LOG_ERR("Could not configure gpio: %d", ret);
return ret;
}
gpio_init_callback(&lis2du12->gpio_cb,
lis2du12_gpio_callback,
BIT(lis2du12->drdy_gpio->pin));
if (gpio_add_callback(lis2du12->drdy_gpio->port, &lis2du12->gpio_cb) < 0) {
LOG_ERR("Could not set gpio callback");
return -EIO;
}
return gpio_pin_interrupt_configure_dt(lis2du12->drdy_gpio,
GPIO_INT_EDGE_TO_ACTIVE);
}