| /* |
| * Copyright (c) 2016 Intel Corporation |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <device.h> |
| #include <i2c.h> |
| #include <misc/__assert.h> |
| #include <misc/util.h> |
| #include <kernel.h> |
| #include <sensor.h> |
| |
| #include "hmc5883l.h" |
| |
| int hmc5883l_trigger_set(struct device *dev, |
| const struct sensor_trigger *trig, |
| sensor_trigger_handler_t handler) |
| { |
| struct hmc5883l_data *drv_data = dev->driver_data; |
| |
| __ASSERT_NO_MSG(trig->type == SENSOR_TRIG_DATA_READY); |
| |
| gpio_pin_disable_callback(drv_data->gpio, CONFIG_HMC5883L_GPIO_PIN_NUM); |
| |
| drv_data->data_ready_handler = handler; |
| if (handler == NULL) { |
| return 0; |
| } |
| |
| drv_data->data_ready_trigger = *trig; |
| |
| gpio_pin_enable_callback(drv_data->gpio, CONFIG_HMC5883L_GPIO_PIN_NUM); |
| |
| return 0; |
| } |
| |
| static void hmc5883l_gpio_callback(struct device *dev, |
| struct gpio_callback *cb, uint32_t pins) |
| { |
| struct hmc5883l_data *drv_data = |
| CONTAINER_OF(cb, struct hmc5883l_data, gpio_cb); |
| |
| ARG_UNUSED(pins); |
| |
| gpio_pin_disable_callback(dev, CONFIG_HMC5883L_GPIO_PIN_NUM); |
| |
| #if defined(CONFIG_HMC5883L_TRIGGER_OWN_THREAD) |
| k_sem_give(&drv_data->gpio_sem); |
| #elif defined(CONFIG_HMC5883L_TRIGGER_GLOBAL_THREAD) |
| k_work_submit(&drv_data->work); |
| #endif |
| } |
| |
| static void hmc5883l_thread_cb(void *arg) |
| { |
| struct device *dev = arg; |
| struct hmc5883l_data *drv_data = dev->driver_data; |
| |
| if (drv_data->data_ready_handler != NULL) { |
| drv_data->data_ready_handler(dev, |
| &drv_data->data_ready_trigger); |
| } |
| |
| gpio_pin_enable_callback(drv_data->gpio, CONFIG_HMC5883L_GPIO_PIN_NUM); |
| } |
| |
| #ifdef CONFIG_HMC5883L_TRIGGER_OWN_THREAD |
| static void hmc5883l_thread(int dev_ptr, int unused) |
| { |
| struct device *dev = INT_TO_POINTER(dev_ptr); |
| struct hmc5883l_data *drv_data = dev->driver_data; |
| |
| ARG_UNUSED(unused); |
| |
| while (1) { |
| k_sem_take(&drv_data->gpio_sem, K_FOREVER); |
| hmc5883l_thread_cb(dev); |
| } |
| } |
| #endif |
| |
| #ifdef CONFIG_HMC5883L_TRIGGER_GLOBAL_THREAD |
| static void hmc5883l_work_cb(struct k_work *work) |
| { |
| struct hmc5883l_data *drv_data = |
| CONTAINER_OF(work, struct hmc5883l_data, work); |
| |
| hmc5883l_thread_cb(drv_data->dev); |
| } |
| #endif |
| |
| int hmc5883l_init_interrupt(struct device *dev) |
| { |
| struct hmc5883l_data *drv_data = dev->driver_data; |
| |
| /* setup data ready gpio interrupt */ |
| drv_data->gpio = device_get_binding(CONFIG_HMC5883L_GPIO_DEV_NAME); |
| if (drv_data->gpio == NULL) { |
| SYS_LOG_ERR("Failed to get pointer to %s device.", |
| CONFIG_HMC5883L_GPIO_DEV_NAME); |
| return -EINVAL; |
| } |
| |
| gpio_pin_configure(drv_data->gpio, CONFIG_HMC5883L_GPIO_PIN_NUM, |
| GPIO_DIR_IN | GPIO_INT | GPIO_INT_EDGE | |
| GPIO_INT_ACTIVE_LOW | GPIO_INT_DEBOUNCE); |
| |
| gpio_init_callback(&drv_data->gpio_cb, |
| hmc5883l_gpio_callback, |
| BIT(CONFIG_HMC5883L_GPIO_PIN_NUM)); |
| |
| if (gpio_add_callback(drv_data->gpio, &drv_data->gpio_cb) < 0) { |
| SYS_LOG_ERR("Failed to set gpio callback."); |
| return -EIO; |
| } |
| |
| #if defined(CONFIG_HMC5883L_TRIGGER_OWN_THREAD) |
| k_sem_init(&drv_data->gpio_sem, 0, UINT_MAX); |
| |
| k_thread_spawn(drv_data->thread_stack, CONFIG_HMC5883L_THREAD_STACK_SIZE, |
| (k_thread_entry_t)hmc5883l_thread, POINTER_TO_INT(dev), |
| 0, NULL, K_PRIO_COOP(CONFIG_HMC5883L_THREAD_PRIORITY), 0, 0); |
| #elif defined(CONFIG_HMC5883L_TRIGGER_GLOBAL_THREAD) |
| drv_data->work.handler = hmc5883l_work_cb; |
| drv_data->dev = dev; |
| #endif |
| |
| gpio_pin_enable_callback(drv_data->gpio, CONFIG_HMC5883L_GPIO_PIN_NUM); |
| |
| return 0; |
| } |