| /* ST Microelectronics LIS2DE12 3-axis accelerometer sensor driver |
| * |
| * Copyright (c) 2024 STMicroelectronics |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Datasheet: |
| * https://www.st.com/resource/en/datasheet/lis2de12.pdf |
| */ |
| |
| #define DT_DRV_COMPAT st_lis2de12 |
| |
| #include <zephyr/kernel.h> |
| #include <zephyr/drivers/sensor.h> |
| #include <zephyr/drivers/gpio.h> |
| #include <zephyr/logging/log.h> |
| |
| #include "lis2de12.h" |
| |
| LOG_MODULE_DECLARE(LIS2DE12, CONFIG_SENSOR_LOG_LEVEL); |
| |
| /** |
| * lis2de12_enable_xl_int - XL enable selected int pin to generate interrupt |
| */ |
| static int lis2de12_enable_xl_int(const struct device *dev, int enable) |
| { |
| const struct lis2de12_config *cfg = dev->config; |
| stmdev_ctx_t *ctx = (stmdev_ctx_t *)&cfg->ctx; |
| lis2de12_ctrl_reg3_t val = {0}; |
| int ret; |
| |
| if (enable) { |
| int16_t xl_data[3]; |
| |
| /* dummy read: re-trigger interrupt */ |
| lis2de12_acceleration_raw_get(ctx, xl_data); |
| } |
| |
| /* set interrupt */ |
| ret = lis2de12_pin_int1_config_get(ctx, &val); |
| if (ret < 0) { |
| LOG_ERR("pint_int1_route_get error"); |
| return ret; |
| } |
| |
| val.i1_zyxda = 1; |
| |
| return lis2de12_pin_int1_config_set(ctx, &val); |
| } |
| |
| /** |
| * lis2de12_trigger_set - link external trigger to event data ready |
| */ |
| int lis2de12_trigger_set(const struct device *dev, |
| const struct sensor_trigger *trig, |
| sensor_trigger_handler_t handler) |
| { |
| const struct lis2de12_config *cfg = dev->config; |
| struct lis2de12_data *lis2de12 = dev->data; |
| |
| if (!cfg->trig_enabled) { |
| LOG_ERR("trigger_set op not supported"); |
| return -ENOTSUP; |
| } |
| |
| switch (trig->chan) { |
| case SENSOR_CHAN_ACCEL_XYZ: |
| lis2de12->handler_drdy_acc = handler; |
| lis2de12->trig_drdy_acc = trig; |
| if (handler) { |
| return lis2de12_enable_xl_int(dev, LIS2DE12_EN_BIT); |
| } |
| |
| return lis2de12_enable_xl_int(dev, LIS2DE12_DIS_BIT); |
| |
| default: |
| return -ENOTSUP; |
| } |
| |
| } |
| |
| /** |
| * lis2de12_handle_interrupt - handle the drdy event |
| * read data and call handler if registered any |
| */ |
| static void lis2de12_handle_interrupt(const struct device *dev) |
| { |
| struct lis2de12_data *lis2de12 = dev->data; |
| const struct lis2de12_config *cfg = dev->config; |
| stmdev_ctx_t *ctx = (stmdev_ctx_t *)&cfg->ctx; |
| lis2de12_status_reg_t status; |
| |
| while (1) { |
| if (lis2de12_status_get(ctx, &status) < 0) { |
| LOG_ERR("failed reading status reg"); |
| return; |
| } |
| |
| if (status.zyxda == 0) { |
| /* spurious interrupt */ |
| break; |
| } |
| |
| if ((status.zyxda) && (lis2de12->handler_drdy_acc != NULL)) { |
| lis2de12->handler_drdy_acc(dev, lis2de12->trig_drdy_acc); |
| } |
| } |
| |
| gpio_pin_interrupt_configure_dt(lis2de12->drdy_gpio, |
| GPIO_INT_EDGE_TO_ACTIVE); |
| } |
| |
| static void lis2de12_gpio_callback(const struct device *dev, |
| struct gpio_callback *cb, uint32_t pins) |
| { |
| struct lis2de12_data *lis2de12 = |
| CONTAINER_OF(cb, struct lis2de12_data, gpio_cb); |
| |
| ARG_UNUSED(pins); |
| |
| gpio_pin_interrupt_configure_dt(lis2de12->drdy_gpio, GPIO_INT_DISABLE); |
| |
| #if defined(CONFIG_LIS2DE12_TRIGGER_OWN_THREAD) |
| k_sem_give(&lis2de12->gpio_sem); |
| #elif defined(CONFIG_LIS2DE12_TRIGGER_GLOBAL_THREAD) |
| k_work_submit(&lis2de12->work); |
| #endif /* CONFIG_LIS2DE12_TRIGGER_OWN_THREAD */ |
| } |
| |
| #ifdef CONFIG_LIS2DE12_TRIGGER_OWN_THREAD |
| static void lis2de12_thread(struct lis2de12_data *lis2de12) |
| { |
| while (1) { |
| k_sem_take(&lis2de12->gpio_sem, K_FOREVER); |
| lis2de12_handle_interrupt(lis2de12->dev); |
| } |
| } |
| #endif /* CONFIG_LIS2DE12_TRIGGER_OWN_THREAD */ |
| |
| #ifdef CONFIG_LIS2DE12_TRIGGER_GLOBAL_THREAD |
| static void lis2de12_work_cb(struct k_work *work) |
| { |
| struct lis2de12_data *lis2de12 = |
| CONTAINER_OF(work, struct lis2de12_data, work); |
| |
| lis2de12_handle_interrupt(lis2de12->dev); |
| } |
| #endif /* CONFIG_LIS2DE12_TRIGGER_GLOBAL_THREAD */ |
| |
| int lis2de12_init_interrupt(const struct device *dev) |
| { |
| struct lis2de12_data *lis2de12 = dev->data; |
| const struct lis2de12_config *cfg = dev->config; |
| int ret; |
| |
| lis2de12->drdy_gpio = (struct gpio_dt_spec *)&cfg->int1_gpio; |
| |
| /* setup data ready gpio interrupt */ |
| if (!gpio_is_ready_dt(lis2de12->drdy_gpio)) { |
| LOG_ERR("Cannot get pointer to drdy_gpio device (%p)", |
| lis2de12->drdy_gpio); |
| return -EINVAL; |
| } |
| |
| #if defined(CONFIG_LIS2DE12_TRIGGER_OWN_THREAD) |
| k_sem_init(&lis2de12->gpio_sem, 0, K_SEM_MAX_LIMIT); |
| |
| k_thread_create(&lis2de12->thread, lis2de12->thread_stack, |
| CONFIG_LIS2DE12_THREAD_STACK_SIZE, |
| (k_thread_entry_t)lis2de12_thread, lis2de12, |
| NULL, NULL, K_PRIO_COOP(CONFIG_LIS2DE12_THREAD_PRIORITY), |
| 0, K_NO_WAIT); |
| k_thread_name_set(&lis2de12->thread, dev->name); |
| #elif defined(CONFIG_LIS2DE12_TRIGGER_GLOBAL_THREAD) |
| lis2de12->work.handler = lis2de12_work_cb; |
| #endif /* CONFIG_LIS2DE12_TRIGGER_OWN_THREAD */ |
| |
| ret = gpio_pin_configure_dt(lis2de12->drdy_gpio, GPIO_INPUT); |
| if (ret < 0) { |
| LOG_ERR("Could not configure gpio: %d", ret); |
| return ret; |
| } |
| |
| gpio_init_callback(&lis2de12->gpio_cb, |
| lis2de12_gpio_callback, |
| BIT(lis2de12->drdy_gpio->pin)); |
| |
| if (gpio_add_callback(lis2de12->drdy_gpio->port, &lis2de12->gpio_cb) < 0) { |
| LOG_ERR("Could not set gpio callback"); |
| return -EIO; |
| } |
| |
| return gpio_pin_interrupt_configure_dt(lis2de12->drdy_gpio, |
| GPIO_INT_EDGE_TO_ACTIVE); |
| } |