blob: fa315d64e63f60cc91f21b2061a7498df211bf93 [file] [log] [blame]
/*
* Copyright (c) 2020, Laird Connectivity
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT honeywell_sm351lt
#include "sm351lt.h"
#include <zephyr/init.h>
#include <zephyr/sys/byteorder.h>
#include <zephyr/logging/log.h>
#include <stdio.h>
#include <zephyr/sys/util.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/drivers/sensor.h>
#include <string.h>
LOG_MODULE_REGISTER(SM351LT, CONFIG_SENSOR_LOG_LEVEL);
#if CONFIG_SM351LT_TRIGGER
static int sm351lt_trigger_set(const struct device *dev,
const struct sensor_trigger *trig,
sensor_trigger_handler_t handler)
{
const struct sm351lt_config *const config = dev->config;
struct sm351lt_data *data = dev->data;
int ret = -ENOTSUP;
if (trig->chan == SENSOR_CHAN_PROX) {
data->changed_handler = handler;
data->changed_trigger = trig;
ret = gpio_pin_interrupt_configure_dt(&config->int_gpio,
(handler ? data->trigger_type
: GPIO_INT_DISABLE));
if (ret < 0) {
return ret;
}
if (handler) {
ret = gpio_add_callback(config->int_gpio.port,
&data->gpio_cb);
} else {
ret = gpio_remove_callback(config->int_gpio.port,
&data->gpio_cb);
}
}
return ret;
}
static void sm351lt_gpio_callback(const struct device *dev,
struct gpio_callback *cb, uint32_t pins)
{
struct sm351lt_data *data =
CONTAINER_OF(cb, struct sm351lt_data, gpio_cb);
#if defined(CONFIG_SM351LT_TRIGGER_OWN_THREAD)
k_sem_give(&data->gpio_sem);
#elif defined(CONFIG_SM351LT_TRIGGER_GLOBAL_THREAD)
k_work_submit(&data->work);
#endif
}
static void sm351lt_thread_cb(const struct device *dev)
{
struct sm351lt_data *data = dev->data;
if (likely(data->changed_handler != NULL)) {
data->changed_handler(dev, data->changed_trigger);
}
return;
}
#if defined(CONFIG_SM351LT_TRIGGER_OWN_THREAD)
static void sm351lt_thread(void *arg1, void *unused2, void *unused3)
{
struct sm351lt_data *data = arg1;
ARG_UNUSED(unused2);
ARG_UNUSED(unused3);
while (1) {
k_sem_take(&data->gpio_sem, K_FOREVER);
sm351lt_thread_cb(data->dev);
}
}
#endif
#if defined(CONFIG_SM351LT_TRIGGER_GLOBAL_THREAD)
static void sm351lt_work_cb(struct k_work *work)
{
struct sm351lt_data *data =
CONTAINER_OF(work, struct sm351lt_data, work);
sm351lt_thread_cb(data->dev);
}
#endif
#endif
static int sm351lt_sample_fetch(const struct device *dev,
enum sensor_channel chan)
{
const struct sm351lt_config *config = dev->config;
struct sm351lt_data *data = dev->data;
if (chan != SENSOR_CHAN_ALL && chan != SENSOR_CHAN_PROX) {
return -ENOTSUP;
}
data->sample_status = gpio_pin_get_dt(&config->int_gpio);
return 0;
}
static int sm351lt_channel_get(const struct device *dev,
enum sensor_channel chan,
struct sensor_value *val)
{
struct sm351lt_data *data = dev->data;
if (chan == SENSOR_CHAN_PROX) {
val->val1 = data->sample_status;
val->val2 = 0;
} else {
return -ENOTSUP;
}
return 0;
}
#if CONFIG_SM351LT_TRIGGER
static int sm351lt_attr_set(const struct device *dev,
enum sensor_channel chan,
enum sensor_attribute attr,
const struct sensor_value *val)
{
struct sm351lt_data *data = dev->data;
if (chan == SENSOR_CHAN_PROX) {
if (attr == SENSOR_ATTR_SM351LT_TRIGGER_TYPE) {
/* Interrupt triggering type */
data->trigger_type = val->val1;
} else {
return -ENOTSUP;
}
} else {
return -ENOTSUP;
}
return 0;
}
static int sm351lt_attr_get(const struct device *dev,
enum sensor_channel chan,
enum sensor_attribute attr,
struct sensor_value *val)
{
struct sm351lt_data *data = dev->data;
if (chan == SENSOR_CHAN_PROX) {
if (attr == SENSOR_ATTR_SM351LT_TRIGGER_TYPE) {
/* Interrupt triggering type */
val->val1 = data->trigger_type;
val->val2 = 0;
} else {
return -ENOTSUP;
}
} else {
return -ENOTSUP;
}
return 0;
}
#endif
static const struct sensor_driver_api sm351lt_api_funcs = {
.sample_fetch = sm351lt_sample_fetch,
.channel_get = sm351lt_channel_get,
#if CONFIG_SM351LT_TRIGGER
.attr_set = sm351lt_attr_set,
.attr_get = sm351lt_attr_get,
.trigger_set = sm351lt_trigger_set,
#endif
};
static int sm351lt_init(const struct device *dev)
{
const struct sm351lt_config *const config = dev->config;
uint32_t ret;
if (!device_is_ready(config->int_gpio.port)) {
LOG_ERR("GPIO device not ready");
return -ENODEV;
}
ret = gpio_pin_configure_dt(&config->int_gpio, GPIO_INPUT);
if (ret) {
LOG_ERR("failed to configure gpio: %d", ret);
return ret;
}
#if defined(CONFIG_SM351LT_TRIGGER)
struct sm351lt_data *data = dev->data;
data->dev = dev;
#if defined(CONFIG_SM351LT_TRIGGER_OWN_THREAD)
k_sem_init(&data->gpio_sem, 0, K_SEM_MAX_LIMIT);
k_thread_create(&data->thread, data->thread_stack,
CONFIG_SM351LT_THREAD_STACK_SIZE,
(k_thread_entry_t)sm351lt_thread, data, NULL,
NULL, K_PRIO_COOP(CONFIG_SM351LT_THREAD_PRIORITY),
0, K_NO_WAIT);
#if defined(CONFIG_THREAD_NAME) && defined(CONFIG_THREAD_MAX_NAME_LEN)
/* Sets up thread name as the device name */
k_thread_name_set(&data->thread, dev->name);
#endif
#elif defined(CONFIG_SM351LT_TRIGGER_GLOBAL_THREAD)
data->work.handler = sm351lt_work_cb;
#endif
data->trigger_type = GPIO_INT_DISABLE;
ret = gpio_pin_interrupt_configure_dt(&config->int_gpio,
GPIO_INT_DISABLE);
if (ret) {
LOG_ERR("failed to configure gpio interrupt: %d", ret);
return ret;
}
/* Setup callback struct but do not add it yet */
gpio_init_callback(&data->gpio_cb, sm351lt_gpio_callback,
BIT(config->int_gpio.pin));
#endif
return 0;
}
/* Instantiation macros for each individual device. */
#define SM351LT_DEFINE(inst) \
static struct sm351lt_data sm351lt_data_##inst; \
static const struct sm351lt_config sm351lt_config_##inst = { \
.int_gpio = GPIO_DT_SPEC_INST_GET(inst, gpios), \
}; \
\
SENSOR_DEVICE_DT_INST_DEFINE(inst, \
sm351lt_init, \
NULL, \
&sm351lt_data_##inst, \
&sm351lt_config_##inst, \
POST_KERNEL, \
CONFIG_SENSOR_INIT_PRIORITY, \
&sm351lt_api_funcs);
/* Main instantiation macro for every configured device in DTS. */
DT_INST_FOREACH_STATUS_OKAY(SM351LT_DEFINE)