| /* 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 <zephyr/kernel.h> |
| #include <zephyr/drivers/sensor.h> |
| #include <zephyr/drivers/gpio.h> |
| #include <zephyr/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); |
| } |