| /* |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Würth Elektronic WSEN-ITDS 3-axis accel sensor driver |
| * |
| * Copyright (c) 2020 Linumiz |
| * Author: Saravanan Sekar <saravanan@linumiz.com> |
| */ |
| |
| #include <kernel.h> |
| #include <drivers/sensor.h> |
| #include <drivers/gpio.h> |
| #include <logging/log.h> |
| |
| #include "itds.h" |
| LOG_MODULE_DECLARE(ITDS, CONFIG_SENSOR_LOG_LEVEL); |
| |
| static int itds_trigger_drdy_set(const struct device *dev, |
| enum sensor_channel chan, |
| sensor_trigger_handler_t handler) |
| { |
| struct itds_device_data *ddata = dev->data; |
| const struct itds_device_config *cfg = dev->config; |
| uint8_t drdy_en = 0U; |
| int ret; |
| |
| ddata->handler_drdy = handler; |
| if (ddata->handler_drdy) { |
| drdy_en = ITDS_MASK_INT_DRDY; |
| } |
| |
| ret = i2c_reg_update_byte(ddata->i2c, cfg->i2c_addr, ITDS_REG_CTRL4, |
| ITDS_MASK_INT_DRDY, drdy_en); |
| if (ret) { |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| int itds_trigger_set(const struct device *dev, |
| const struct sensor_trigger *trig, |
| sensor_trigger_handler_t handler) |
| { |
| if (trig->chan != SENSOR_CHAN_ACCEL_XYZ) { |
| return -ENOTSUP; |
| } |
| |
| switch (trig->type) { |
| case SENSOR_TRIG_DATA_READY: |
| return itds_trigger_drdy_set(dev, trig->chan, handler); |
| |
| default: |
| return -ENOTSUP; |
| } |
| } |
| |
| static void itds_work_handler(struct k_work *work) |
| { |
| struct itds_device_data *ddata = |
| CONTAINER_OF(work, struct itds_device_data, work); |
| const struct device *dev = (const struct device *)ddata->dev; |
| const struct itds_device_config *cfg = dev->config; |
| uint8_t status; |
| struct sensor_trigger drdy_trigger = { |
| .chan = SENSOR_CHAN_ACCEL_XYZ, |
| }; |
| |
| if (i2c_reg_read_byte(ddata->i2c, cfg->i2c_addr, ITDS_REG_STATUS, |
| &status) < 0) { |
| return; |
| } |
| |
| if (status & ITDS_EVENT_DRDY) { |
| if (ddata->handler_drdy) { |
| drdy_trigger.type = SENSOR_TRIG_DATA_READY; |
| ddata->handler_drdy(dev, &drdy_trigger); |
| } |
| } |
| } |
| |
| static void itds_gpio_callback(const struct device *port, |
| struct gpio_callback *cb, uint32_t pin) |
| { |
| struct itds_device_data *ddata = |
| CONTAINER_OF(cb, struct itds_device_data, gpio_cb); |
| |
| ARG_UNUSED(port); |
| ARG_UNUSED(pin); |
| |
| k_work_submit(&ddata->work); |
| } |
| |
| int itds_trigger_mode_init(const struct device *dev) |
| { |
| struct itds_device_data *ddata = dev->data; |
| const struct itds_device_config *cfg = dev->config; |
| |
| ddata->gpio = device_get_binding(cfg->gpio_port); |
| if (!ddata->gpio) { |
| LOG_DBG("Gpio controller %s not found.", cfg->gpio_port); |
| return -EINVAL; |
| } |
| |
| ddata->work.handler = itds_work_handler; |
| ddata->dev = dev; |
| |
| gpio_pin_configure(ddata->gpio, cfg->int_pin, |
| GPIO_INPUT | cfg->int_flags); |
| |
| gpio_init_callback(&ddata->gpio_cb, itds_gpio_callback, |
| BIT(cfg->int_pin)); |
| |
| gpio_add_callback(ddata->gpio, &ddata->gpio_cb); |
| gpio_pin_interrupt_configure(ddata->gpio, cfg->int_pin, |
| GPIO_INT_EDGE_TO_ACTIVE); |
| |
| /* enable global interrupt */ |
| return i2c_reg_update_byte(ddata->i2c, cfg->i2c_addr, ITDS_REG_CTRL7, |
| ITDS_MASK_INT_EN, ITDS_MASK_INT_EN); |
| } |