136 lines
3.4 KiB
C
136 lines
3.4 KiB
C
/*
|
|
* Copyright (c) 2018 Analog Devices Inc.
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#include <device.h>
|
|
#include <gpio.h>
|
|
#include <i2c.h>
|
|
#include <misc/util.h>
|
|
#include <kernel.h>
|
|
#include <sensor.h>
|
|
#include "adt7420.h"
|
|
|
|
static void adt7420_thread_cb(void *arg)
|
|
{
|
|
struct device *dev = arg;
|
|
struct adt7420_data *drv_data = dev->driver_data;
|
|
const struct adt7420_dev_config *cfg = dev->config->config_info;
|
|
u8_t status;
|
|
|
|
/* Clear the status */
|
|
if (i2c_reg_read_byte(drv_data->i2c, cfg->i2c_addr,
|
|
ADT7420_REG_STATUS, &status) < 0) {
|
|
return;
|
|
}
|
|
|
|
if (drv_data->th_handler != NULL) {
|
|
drv_data->th_handler(dev, &drv_data->th_trigger);
|
|
}
|
|
|
|
gpio_pin_enable_callback(drv_data->gpio, cfg->int_gpio);
|
|
}
|
|
|
|
static void adt7420_gpio_callback(struct device *dev,
|
|
struct gpio_callback *cb, u32_t pins)
|
|
{
|
|
struct adt7420_data *drv_data =
|
|
CONTAINER_OF(cb, struct adt7420_data, gpio_cb);
|
|
const struct adt7420_dev_config *cfg = dev->config->config_info;
|
|
|
|
gpio_pin_disable_callback(dev, cfg->int_gpio);
|
|
|
|
#if defined(CONFIG_ADT7420_TRIGGER_OWN_THREAD)
|
|
k_sem_give(&drv_data->gpio_sem);
|
|
#elif defined(CONFIG_ADT7420_TRIGGER_GLOBAL_THREAD)
|
|
k_work_submit(&drv_data->work);
|
|
#endif
|
|
}
|
|
|
|
#if defined(CONFIG_ADT7420_TRIGGER_OWN_THREAD)
|
|
static void adt7420_thread(int dev_ptr, int unused)
|
|
{
|
|
struct device *dev = INT_TO_POINTER(dev_ptr);
|
|
struct adt7420_data *drv_data = dev->driver_data;
|
|
|
|
ARG_UNUSED(unused);
|
|
|
|
while (true) {
|
|
k_sem_take(&drv_data->gpio_sem, K_FOREVER);
|
|
adt7420_thread_cb(dev);
|
|
}
|
|
}
|
|
|
|
#elif defined(CONFIG_ADT7420_TRIGGER_GLOBAL_THREAD)
|
|
static void adt7420_work_cb(struct k_work *work)
|
|
{
|
|
struct adt7420_data *drv_data =
|
|
CONTAINER_OF(work, struct adt7420_data, work);
|
|
adt7420_thread_cb(drv_data->dev);
|
|
}
|
|
#endif
|
|
|
|
int adt7420_trigger_set(struct device *dev,
|
|
const struct sensor_trigger *trig,
|
|
sensor_trigger_handler_t handler)
|
|
{
|
|
struct adt7420_data *drv_data = dev->driver_data;
|
|
const struct adt7420_dev_config *cfg = dev->config->config_info;
|
|
|
|
gpio_pin_disable_callback(drv_data->gpio, cfg->int_gpio);
|
|
|
|
if (trig->type == SENSOR_TRIG_THRESHOLD) {
|
|
drv_data->th_handler = handler;
|
|
drv_data->th_trigger = *trig;
|
|
} else {
|
|
SYS_LOG_ERR("Unsupported sensor trigger");
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
gpio_pin_enable_callback(drv_data->gpio, cfg->int_gpio);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int adt7420_init_interrupt(struct device *dev)
|
|
{
|
|
struct adt7420_data *drv_data = dev->driver_data;
|
|
const struct adt7420_dev_config *cfg = dev->config->config_info;
|
|
|
|
drv_data->gpio = device_get_binding(cfg->gpio_port);
|
|
if (drv_data->gpio == NULL) {
|
|
SYS_LOG_DBG("Failed to get pointer to %s device!",
|
|
cfg->gpio_port);
|
|
return -EINVAL;
|
|
}
|
|
|
|
gpio_pin_configure(drv_data->gpio, cfg->int_gpio,
|
|
GPIO_DIR_IN | GPIO_INT | GPIO_INT_EDGE |
|
|
GPIO_INT_ACTIVE_LOW | GPIO_INT_DEBOUNCE);
|
|
|
|
gpio_init_callback(&drv_data->gpio_cb,
|
|
adt7420_gpio_callback,
|
|
BIT(cfg->int_gpio));
|
|
|
|
if (gpio_add_callback(drv_data->gpio, &drv_data->gpio_cb) < 0) {
|
|
SYS_LOG_DBG("Failed to set gpio callback!");
|
|
return -EIO;
|
|
}
|
|
|
|
#if defined(CONFIG_ADT7420_TRIGGER_OWN_THREAD)
|
|
k_sem_init(&drv_data->gpio_sem, 0, UINT_MAX);
|
|
|
|
k_thread_create(&drv_data->thread, drv_data->thread_stack,
|
|
CONFIG_ADT7420_THREAD_STACK_SIZE,
|
|
(k_thread_entry_t)adt7420_thread, dev,
|
|
0, NULL, K_PRIO_COOP(CONFIG_ADT7420_THREAD_PRIORITY),
|
|
0, 0);
|
|
#elif defined(CONFIG_ADT7420_TRIGGER_GLOBAL_THREAD)
|
|
drv_data->work.handler = adt7420_work_cb;
|
|
drv_data->dev = dev;
|
|
#endif
|
|
|
|
return 0;
|
|
}
|