blob: 5f5ee23ca42b1888a8401bc2dafd966a7b433e7b [file] [log] [blame]
/* ST Microelectronics LPS22HH pressure and temperature sensor
*
* Copyright (c) 2019 STMicroelectronics
*
* SPDX-License-Identifier: Apache-2.0
*
* Datasheet:
* https://www.st.com/resource/en/datasheet/lps22hh.pdf
*/
#define DT_DRV_COMPAT st_lps22hh
#include <kernel.h>
#include <drivers/sensor.h>
#include <drivers/gpio.h>
#include <logging/log.h>
#include "lps22hh.h"
LOG_MODULE_DECLARE(LPS22HH, CONFIG_SENSOR_LOG_LEVEL);
/**
* lps22hh_enable_int - enable selected int pin to generate interrupt
*/
static int lps22hh_enable_int(const struct device *dev, int enable)
{
const struct lps22hh_config * const cfg = dev->config;
stmdev_ctx_t *ctx = (stmdev_ctx_t *)&cfg->ctx;
lps22hh_reg_t int_route;
/* set interrupt */
lps22hh_pin_int_route_get(ctx, &int_route.ctrl_reg3);
int_route.ctrl_reg3.drdy = enable;
return lps22hh_pin_int_route_set(ctx, &int_route.ctrl_reg3);
}
/**
* lps22hh_trigger_set - link external trigger to event data ready
*/
int lps22hh_trigger_set(const struct device *dev,
const struct sensor_trigger *trig,
sensor_trigger_handler_t handler)
{
struct lps22hh_data *lps22hh = dev->data;
const struct lps22hh_config * const cfg = dev->config;
stmdev_ctx_t *ctx = (stmdev_ctx_t *)&cfg->ctx;
uint32_t raw_press;
if (trig->chan == SENSOR_CHAN_ALL) {
lps22hh->handler_drdy = handler;
if (handler) {
/* dummy read: re-trigger interrupt */
if (lps22hh_pressure_raw_get(ctx, &raw_press) < 0) {
LOG_DBG("Failed to read sample");
return -EIO;
}
return lps22hh_enable_int(dev, 1);
} else {
return lps22hh_enable_int(dev, 0);
}
}
return -ENOTSUP;
}
/**
* lps22hh_handle_interrupt - handle the drdy event
* read data and call handler if registered any
*/
static void lps22hh_handle_interrupt(const struct device *dev)
{
int ret;
struct lps22hh_data *lps22hh = dev->data;
const struct lps22hh_config *cfg = dev->config;
struct sensor_trigger drdy_trigger = {
.type = SENSOR_TRIG_DATA_READY,
};
if (lps22hh->handler_drdy != NULL) {
lps22hh->handler_drdy(dev, &drdy_trigger);
}
ret = gpio_pin_interrupt_configure_dt(&cfg->gpio_int,
GPIO_INT_EDGE_TO_ACTIVE);
if (ret < 0) {
LOG_ERR("%s: Not able to configure pin_int", dev->name);
}
}
static void lps22hh_gpio_callback(const struct device *dev,
struct gpio_callback *cb, uint32_t pins)
{
struct lps22hh_data *lps22hh =
CONTAINER_OF(cb, struct lps22hh_data, gpio_cb);
ARG_UNUSED(pins);
const struct lps22hh_config *cfg = lps22hh->dev->config;
int ret;
ret = gpio_pin_interrupt_configure_dt(&cfg->gpio_int, GPIO_INT_DISABLE);
if (ret < 0) {
LOG_ERR("%s: Not able to configure pin_int", dev->name);
}
#if defined(CONFIG_LPS22HH_TRIGGER_OWN_THREAD)
k_sem_give(&lps22hh->gpio_sem);
#elif defined(CONFIG_LPS22HH_TRIGGER_GLOBAL_THREAD)
k_work_submit(&lps22hh->work);
#endif /* CONFIG_LPS22HH_TRIGGER_OWN_THREAD */
}
#ifdef CONFIG_LPS22HH_TRIGGER_OWN_THREAD
static void lps22hh_thread(struct lps22hh_data *lps22hh)
{
while (1) {
k_sem_take(&lps22hh->gpio_sem, K_FOREVER);
lps22hh_handle_interrupt(lps22hh->dev);
}
}
#endif /* CONFIG_LPS22HH_TRIGGER_OWN_THREAD */
#ifdef CONFIG_LPS22HH_TRIGGER_GLOBAL_THREAD
static void lps22hh_work_cb(struct k_work *work)
{
struct lps22hh_data *lps22hh =
CONTAINER_OF(work, struct lps22hh_data, work);
lps22hh_handle_interrupt(lps22hh->dev);
}
#endif /* CONFIG_LPS22HH_TRIGGER_GLOBAL_THREAD */
int lps22hh_init_interrupt(const struct device *dev)
{
struct lps22hh_data *lps22hh = dev->data;
const struct lps22hh_config *cfg = dev->config;
stmdev_ctx_t *ctx = (stmdev_ctx_t *)&cfg->ctx;
int ret;
/* setup data ready gpio interrupt */
if (!device_is_ready(cfg->gpio_int.port)) {
if (cfg->gpio_int.port) {
LOG_ERR("%s: device %s is not ready", dev->name,
cfg->gpio_int.port->name);
return -ENODEV;
}
LOG_DBG("%s: gpio_int not defined in DT", dev->name);
return 0;
}
lps22hh->dev = dev;
#if defined(CONFIG_LPS22HH_TRIGGER_OWN_THREAD)
k_sem_init(&lps22hh->gpio_sem, 0, K_SEM_MAX_LIMIT);
k_thread_create(&lps22hh->thread, lps22hh->thread_stack,
CONFIG_LPS22HH_THREAD_STACK_SIZE,
(k_thread_entry_t)lps22hh_thread, lps22hh,
NULL, NULL, K_PRIO_COOP(CONFIG_LPS22HH_THREAD_PRIORITY),
0, K_NO_WAIT);
#elif defined(CONFIG_LPS22HH_TRIGGER_GLOBAL_THREAD)
lps22hh->work.handler = lps22hh_work_cb;
#endif /* CONFIG_LPS22HH_TRIGGER_OWN_THREAD */
ret = gpio_pin_configure_dt(&cfg->gpio_int, GPIO_INPUT);
if (ret < 0) {
LOG_ERR("Could not configure gpio");
return ret;
}
LOG_INF("%s: int on %s.%02u", dev->name, cfg->gpio_int.port->name,
cfg->gpio_int.pin);
gpio_init_callback(&lps22hh->gpio_cb,
lps22hh_gpio_callback,
BIT(cfg->gpio_int.pin));
ret = gpio_add_callback(cfg->gpio_int.port, &lps22hh->gpio_cb);
if (ret < 0) {
LOG_ERR("Could not set gpio callback");
return ret;
}
/* enable interrupt in pulse mode */
if (lps22hh_int_notification_set(ctx, LPS22HH_INT_PULSED) < 0) {
return -EIO;
}
return gpio_pin_interrupt_configure_dt(&cfg->gpio_int,
GPIO_INT_EDGE_TO_ACTIVE);
}