| /* |
| * Copyright (c) 2017-2019 Phytec Messtechnik GmbH |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #define DT_DRV_COMPAT panasonic_amg88xx |
| |
| #include <string.h> |
| #include <device.h> |
| #include <drivers/i2c.h> |
| #include <drivers/gpio.h> |
| #include <sys/byteorder.h> |
| #include <sys/util.h> |
| #include <kernel.h> |
| #include <drivers/sensor.h> |
| #include <sys/__assert.h> |
| #include <logging/log.h> |
| |
| #include "amg88xx.h" |
| |
| LOG_MODULE_REGISTER(AMG88XX, CONFIG_SENSOR_LOG_LEVEL); |
| |
| static int amg88xx_sample_fetch(struct device *dev, enum sensor_channel chan) |
| { |
| struct amg88xx_data *drv_data = dev->driver_data; |
| const struct amg88xx_config *config = dev->config_info; |
| |
| __ASSERT_NO_MSG(chan == SENSOR_CHAN_ALL || chan == SENSOR_CHAN_AMBIENT_TEMP); |
| |
| if (i2c_burst_read(drv_data->i2c, config->i2c_address, |
| AMG88XX_OUTPUT_BASE, |
| (u8_t *)drv_data->sample, |
| sizeof(drv_data->sample))) { |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| static int amg88xx_channel_get(struct device *dev, |
| enum sensor_channel chan, |
| struct sensor_value *val) |
| { |
| struct amg88xx_data *drv_data = dev->driver_data; |
| size_t len = ARRAY_SIZE(drv_data->sample); |
| |
| if (chan != SENSOR_CHAN_AMBIENT_TEMP) { |
| return -ENOTSUP; |
| } |
| |
| for (size_t idx = 0; idx < len; idx++) { |
| /* fix negative values */ |
| if (drv_data->sample[idx] & (1 << 11)) { |
| drv_data->sample[idx] |= 0xF000; |
| } |
| val[idx].val1 = (((s32_t)drv_data->sample[idx]) * |
| AMG88XX_TREG_LSB_SCALING) / 1000000; |
| val[idx].val2 = (((s32_t)drv_data->sample[idx]) * |
| AMG88XX_TREG_LSB_SCALING) % 1000000; |
| } |
| |
| return 0; |
| } |
| |
| static int amg88xx_init_device(struct device *dev) |
| { |
| struct amg88xx_data *drv_data = dev->driver_data; |
| const struct amg88xx_config *config = dev->config_info; |
| u8_t tmp; |
| |
| if (i2c_reg_read_byte(drv_data->i2c, config->i2c_address, |
| AMG88XX_PCLT, &tmp)) { |
| LOG_ERR("Failed to read Power mode"); |
| return -EIO; |
| } |
| |
| LOG_DBG("Power mode 0x%02x", tmp); |
| if (tmp != AMG88XX_PCLT_NORMAL_MODE) { |
| if (i2c_reg_write_byte(drv_data->i2c, |
| config->i2c_address, |
| AMG88XX_PCLT, |
| AMG88XX_PCLT_NORMAL_MODE)) { |
| return -EIO; |
| } |
| k_busy_wait(AMG88XX_WAIT_MODE_CHANGE_US); |
| } |
| |
| if (i2c_reg_write_byte(drv_data->i2c, config->i2c_address, |
| AMG88XX_RST, AMG88XX_RST_INITIAL_RST)) { |
| return -EIO; |
| } |
| |
| k_busy_wait(AMG88XX_WAIT_INITIAL_RESET_US); |
| |
| if (i2c_reg_write_byte(drv_data->i2c, config->i2c_address, |
| AMG88XX_FPSC, AMG88XX_FPSC_10FPS)) { |
| return -EIO; |
| } |
| |
| LOG_DBG(""); |
| |
| return 0; |
| } |
| |
| int amg88xx_init(struct device *dev) |
| { |
| struct amg88xx_data *drv_data = dev->driver_data; |
| const struct amg88xx_config *config = dev->config_info; |
| |
| drv_data->i2c = device_get_binding(config->i2c_name); |
| if (drv_data->i2c == NULL) { |
| LOG_ERR("Failed to get pointer to %s device!", |
| config->i2c_name); |
| return -EINVAL; |
| } |
| |
| if (amg88xx_init_device(dev) < 0) { |
| LOG_ERR("Failed to initialize device!"); |
| return -EIO; |
| } |
| |
| |
| #ifdef CONFIG_AMG88XX_TRIGGER |
| if (amg88xx_init_interrupt(dev) < 0) { |
| LOG_ERR("Failed to initialize interrupt!"); |
| return -EIO; |
| } |
| #endif |
| |
| return 0; |
| } |
| |
| struct amg88xx_data amg88xx_driver; |
| |
| static const struct sensor_driver_api amg88xx_driver_api = { |
| #ifdef CONFIG_AMG88XX_TRIGGER |
| .attr_set = amg88xx_attr_set, |
| .trigger_set = amg88xx_trigger_set, |
| #endif |
| .sample_fetch = amg88xx_sample_fetch, |
| .channel_get = amg88xx_channel_get, |
| }; |
| |
| static const struct amg88xx_config amg88xx_config = { |
| .i2c_name = DT_INST_BUS_LABEL(0), |
| .i2c_address = DT_INST_REG_ADDR(0), |
| #ifdef CONFIG_AMG88XX_TRIGGER |
| .gpio_name = DT_INST_GPIO_LABEL(0, int_gpios), |
| .gpio_pin = DT_INST_GPIO_PIN(0, int_gpios), |
| .gpio_flags = DT_INST_GPIO_FLAGS(0, int_gpios), |
| #endif |
| }; |
| |
| DEVICE_AND_API_INIT(amg88xx, DT_INST_LABEL(0), amg88xx_init, |
| &amg88xx_driver, &amg88xx_config, |
| POST_KERNEL, CONFIG_SENSOR_INIT_PRIORITY, |
| &amg88xx_driver_api); |