| /* ST Microelectronics IIS2ICLX 2-axis accelerometer sensor driver |
| * |
| * Copyright (c) 2020 STMicroelectronics |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Datasheet: |
| * https://www.st.com/resource/en/datasheet/iis2iclx.pdf |
| */ |
| |
| #define DT_DRV_COMPAT st_iis2iclx |
| |
| #include <zephyr/kernel.h> |
| #include <zephyr/drivers/sensor.h> |
| #include <zephyr/drivers/gpio.h> |
| #include <zephyr/logging/log.h> |
| |
| #include "iis2iclx.h" |
| |
| LOG_MODULE_DECLARE(IIS2ICLX, CONFIG_SENSOR_LOG_LEVEL); |
| |
| #if defined(CONFIG_IIS2ICLX_ENABLE_TEMP) |
| /** |
| * iis2iclx_enable_t_int - TEMP enable selected int pin to generate interrupt |
| */ |
| static int iis2iclx_enable_t_int(const struct device *dev, int enable) |
| { |
| const struct iis2iclx_config *cfg = dev->config; |
| iis2iclx_pin_int2_route_t int2_route; |
| |
| if (enable) { |
| int16_t buf; |
| |
| /* dummy read: re-trigger interrupt */ |
| iis2iclx_temperature_raw_get((stmdev_ctx_t *)&cfg->ctx, &buf); |
| } |
| |
| /* set interrupt (TEMP DRDY interrupt is only on INT2) */ |
| if (cfg->int_pin == 1) |
| return -EIO; |
| |
| iis2iclx_read_reg((stmdev_ctx_t *)&cfg->ctx, IIS2ICLX_INT2_CTRL, |
| (uint8_t *)&int2_route.int2_ctrl, 1); |
| int2_route.int2_ctrl.int2_drdy_temp = enable; |
| return iis2iclx_write_reg((stmdev_ctx_t *)&cfg->ctx, IIS2ICLX_INT2_CTRL, |
| (uint8_t *)&int2_route.int2_ctrl, 1); |
| } |
| #endif |
| |
| /** |
| * iis2iclx_enable_xl_int - XL enable selected int pin to generate interrupt |
| */ |
| static int iis2iclx_enable_xl_int(const struct device *dev, int enable) |
| { |
| const struct iis2iclx_config *cfg = dev->config; |
| |
| if (enable) { |
| int16_t buf[3]; |
| |
| /* dummy read: re-trigger interrupt */ |
| iis2iclx_acceleration_raw_get((stmdev_ctx_t *)&cfg->ctx, buf); |
| } |
| |
| /* set interrupt */ |
| if (cfg->int_pin == 1) { |
| iis2iclx_pin_int1_route_t int1_route; |
| |
| iis2iclx_read_reg((stmdev_ctx_t *)&cfg->ctx, IIS2ICLX_INT1_CTRL, |
| (uint8_t *)&int1_route.int1_ctrl, 1); |
| |
| int1_route.int1_ctrl.int1_drdy_xl = enable; |
| return iis2iclx_write_reg((stmdev_ctx_t *)&cfg->ctx, |
| IIS2ICLX_INT1_CTRL, |
| (uint8_t *)&int1_route.int1_ctrl, 1); |
| } else { |
| iis2iclx_pin_int2_route_t int2_route; |
| |
| iis2iclx_read_reg((stmdev_ctx_t *)&cfg->ctx, IIS2ICLX_INT2_CTRL, |
| (uint8_t *)&int2_route.int2_ctrl, 1); |
| int2_route.int2_ctrl.int2_drdy_xl = enable; |
| return iis2iclx_write_reg((stmdev_ctx_t *)&cfg->ctx, |
| IIS2ICLX_INT2_CTRL, |
| (uint8_t *)&int2_route.int2_ctrl, 1); |
| } |
| } |
| |
| /** |
| * iis2iclx_trigger_set - link external trigger to event data ready |
| */ |
| int iis2iclx_trigger_set(const struct device *dev, |
| const struct sensor_trigger *trig, |
| sensor_trigger_handler_t handler) |
| { |
| const struct iis2iclx_config *cfg = dev->config; |
| struct iis2iclx_data *iis2iclx = dev->data; |
| |
| if (!cfg->trig_enabled) { |
| LOG_ERR("trigger_set op not supported"); |
| return -ENOTSUP; |
| } |
| |
| if (trig->chan == SENSOR_CHAN_ACCEL_XYZ) { |
| iis2iclx->handler_drdy_acc = handler; |
| if (handler) { |
| return iis2iclx_enable_xl_int(dev, IIS2ICLX_EN_BIT); |
| } else { |
| return iis2iclx_enable_xl_int(dev, IIS2ICLX_DIS_BIT); |
| } |
| } |
| #if defined(CONFIG_IIS2ICLX_ENABLE_TEMP) |
| else if (trig->chan == SENSOR_CHAN_DIE_TEMP) { |
| iis2iclx->handler_drdy_temp = handler; |
| if (handler) { |
| return iis2iclx_enable_t_int(dev, IIS2ICLX_EN_BIT); |
| } else { |
| return iis2iclx_enable_t_int(dev, IIS2ICLX_DIS_BIT); |
| } |
| } |
| #endif |
| |
| return -ENOTSUP; |
| } |
| |
| /** |
| * iis2iclx_handle_interrupt - handle the drdy event |
| * read data and call handler if registered any |
| */ |
| static void iis2iclx_handle_interrupt(const struct device *dev) |
| { |
| struct iis2iclx_data *iis2iclx = dev->data; |
| struct sensor_trigger drdy_trigger = { |
| .type = SENSOR_TRIG_DATA_READY, |
| }; |
| const struct iis2iclx_config *cfg = dev->config; |
| iis2iclx_status_reg_t status; |
| |
| while (1) { |
| if (iis2iclx_status_reg_get((stmdev_ctx_t *)&cfg->ctx, |
| &status) < 0) { |
| LOG_DBG("failed reading status reg"); |
| return; |
| } |
| |
| if (status.xlda == 0 |
| #if defined(CONFIG_IIS2ICLX_ENABLE_TEMP) |
| && status.tda == 0 |
| #endif |
| ) { |
| break; |
| } |
| |
| if ((status.xlda) && (iis2iclx->handler_drdy_acc != NULL)) { |
| iis2iclx->handler_drdy_acc(dev, &drdy_trigger); |
| } |
| |
| #if defined(CONFIG_IIS2ICLX_ENABLE_TEMP) |
| if ((status.tda) && (iis2iclx->handler_drdy_temp != NULL)) { |
| iis2iclx->handler_drdy_temp(dev, &drdy_trigger); |
| } |
| #endif |
| } |
| |
| gpio_pin_interrupt_configure_dt(&cfg->gpio_drdy, |
| GPIO_INT_EDGE_TO_ACTIVE); |
| } |
| |
| static void iis2iclx_gpio_callback(const struct device *dev, |
| struct gpio_callback *cb, uint32_t pins) |
| { |
| struct iis2iclx_data *iis2iclx = |
| CONTAINER_OF(cb, struct iis2iclx_data, gpio_cb); |
| const struct iis2iclx_config *cfg = iis2iclx->dev->config; |
| |
| ARG_UNUSED(pins); |
| |
| gpio_pin_interrupt_configure_dt(&cfg->gpio_drdy, GPIO_INT_DISABLE); |
| |
| #if defined(CONFIG_IIS2ICLX_TRIGGER_OWN_THREAD) |
| k_sem_give(&iis2iclx->gpio_sem); |
| #elif defined(CONFIG_IIS2ICLX_TRIGGER_GLOBAL_THREAD) |
| k_work_submit(&iis2iclx->work); |
| #endif /* CONFIG_IIS2ICLX_TRIGGER_OWN_THREAD */ |
| } |
| |
| #ifdef CONFIG_IIS2ICLX_TRIGGER_OWN_THREAD |
| static void iis2iclx_thread(struct iis2iclx_data *iis2iclx) |
| { |
| while (1) { |
| k_sem_take(&iis2iclx->gpio_sem, K_FOREVER); |
| iis2iclx_handle_interrupt(iis2iclx->dev); |
| } |
| } |
| #endif /* CONFIG_IIS2ICLX_TRIGGER_OWN_THREAD */ |
| |
| #ifdef CONFIG_IIS2ICLX_TRIGGER_GLOBAL_THREAD |
| static void iis2iclx_work_cb(struct k_work *work) |
| { |
| struct iis2iclx_data *iis2iclx = |
| CONTAINER_OF(work, struct iis2iclx_data, work); |
| |
| iis2iclx_handle_interrupt(iis2iclx->dev); |
| } |
| #endif /* CONFIG_IIS2ICLX_TRIGGER_GLOBAL_THREAD */ |
| |
| int iis2iclx_init_interrupt(const struct device *dev) |
| { |
| struct iis2iclx_data *iis2iclx = dev->data; |
| const struct iis2iclx_config *cfg = dev->config; |
| int ret; |
| |
| /* setup data ready gpio interrupt (INT1 or INT2) */ |
| if (!device_is_ready(cfg->gpio_drdy.port)) { |
| LOG_ERR("Cannot get pointer to drdy_gpio device"); |
| return -EINVAL; |
| } |
| |
| #if defined(CONFIG_IIS2ICLX_TRIGGER_OWN_THREAD) |
| k_sem_init(&iis2iclx->gpio_sem, 0, K_SEM_MAX_LIMIT); |
| |
| k_thread_create(&iis2iclx->thread, iis2iclx->thread_stack, |
| CONFIG_IIS2ICLX_THREAD_STACK_SIZE, |
| (k_thread_entry_t)iis2iclx_thread, |
| iis2iclx, NULL, NULL, |
| K_PRIO_COOP(CONFIG_IIS2ICLX_THREAD_PRIORITY), |
| 0, K_NO_WAIT); |
| #elif defined(CONFIG_IIS2ICLX_TRIGGER_GLOBAL_THREAD) |
| iis2iclx->work.handler = iis2iclx_work_cb; |
| #endif /* CONFIG_IIS2ICLX_TRIGGER_OWN_THREAD */ |
| |
| ret = gpio_pin_configure_dt(&cfg->gpio_drdy, GPIO_INPUT); |
| if (ret < 0) { |
| LOG_ERR("Could not configure gpio"); |
| return ret; |
| } |
| |
| gpio_init_callback(&iis2iclx->gpio_cb, |
| iis2iclx_gpio_callback, |
| BIT(cfg->gpio_drdy.pin)); |
| |
| if (gpio_add_callback(cfg->gpio_drdy.port, &iis2iclx->gpio_cb) < 0) { |
| LOG_ERR("Could not set gpio callback"); |
| return -EIO; |
| } |
| |
| /* enable interrupt on int1/int2 in pulse mode */ |
| if (iis2iclx_int_notification_set((stmdev_ctx_t *)&cfg->ctx, |
| IIS2ICLX_ALL_INT_PULSED) < 0) { |
| LOG_ERR("Could not set pulse mode"); |
| return -EIO; |
| } |
| |
| if (gpio_pin_interrupt_configure_dt(&cfg->gpio_drdy, |
| GPIO_INT_EDGE_TO_ACTIVE) < 0) { |
| LOG_ERR("Could not configure interrupt"); |
| return -EIO; |
| } |
| |
| return 0; |
| } |