1 /* 2 * Copyright (c) 2024 Florian Weber <Florian.Weber@live.de> 3 * SPDX-License-Identifier: Apache-2.0 4 */ 5 6 #ifndef ZEPHYR_DRIVERS_SENSOR_MLX90394_MLX90394_H_ 7 #define ZEPHYR_DRIVERS_SENSOR_MLX90394_MLX90394_H_ 8 9 #include <zephyr/device.h> 10 #include <zephyr/drivers/i2c.h> 11 #include <zephyr/drivers/sensor.h> 12 #include <zephyr/rtio/rtio.h> 13 14 #include "mlx90394_reg.h" 15 16 /* 17 * Time it takes to start-up the device and switch to powerdown mode (after powercycle or soft 18 * reset) 19 */ 20 #define MLX90394_STARTUP_TIME_US 400 21 22 /* Conversion values */ 23 #define MLX90394_HIGH_RANGE_MICRO_GAUSS_PER_BIT INT64_C(15000) 24 #define MLX90394_HIGH_SENSITIVITY_MICRO_GAUSS_PER_BIT INT64_C(1500) 25 #define MLX90394_MICRO_CELSIUS_PER_BIT INT64_C(20000) 26 27 /* values for setting SENSOR_ATTR_FULL_SCALE */ 28 #define MLX90394_ATTR_FS_HIGH_G INT32_C(500) 29 #define MLX90394_ATTR_FS_LOW_G INT32_C(50) 30 31 struct mlx90394_data { 32 struct __packed { 33 uint8_t stat1; 34 uint8_t x_l; 35 uint8_t x_h; 36 uint8_t y_l; 37 uint8_t y_h; 38 uint8_t z_l; 39 uint8_t z_h; 40 uint8_t stat2; 41 uint8_t temp_l; 42 uint8_t temp_h; 43 } sample; 44 enum sensor_channel channel; 45 enum mlx90394_reg_config_val config_val; 46 int32_t measurement_time_us; 47 struct __packed { 48 uint8_t ctrl1; 49 uint8_t ctrl2; 50 uint8_t ctrl3; 51 uint8_t ctrl4; 52 } ctrl_reg_values; 53 bool initialized; 54 #ifdef CONFIG_SENSOR_ASYNC_API 55 struct { 56 struct rtio_iodev_sqe *iodev_sqe; 57 uint64_t timestamp; 58 enum mlx90394_reg_config_val config_val; 59 } work_ctx; 60 struct k_work_delayable async_fetch_work; 61 const struct device *dev; 62 #endif 63 }; 64 65 struct mlx90394_config { 66 struct i2c_dt_spec i2c; 67 }; 68 69 int mlx90394_sample_fetch_internal(const struct device *dev, enum sensor_channel chan); 70 int mlx90394_trigger_measurement_internal(const struct device *dev, enum sensor_channel chan); 71 72 /* RTIO types and defines */ 73 #ifdef CONFIG_SENSOR_ASYNC_API 74 75 /* shift value to use. */ 76 #define MLX90394_SHIFT_MAGN_HIGH_SENSITIVITY (6) 77 #define MLX90394_SHIFT_MAGN_HIGH_RANGE (9) 78 #define MLX90394_SHIFT_TEMP (10) 79 80 void mlx90394_async_fetch(struct k_work *work); 81 82 struct mlx90394_decoder_header { 83 uint64_t timestamp; 84 enum mlx90394_reg_config_val config_val; 85 }; 86 87 struct mlx90394_encoded_data { 88 struct mlx90394_decoder_header header; 89 int16_t readings[4]; 90 }; 91 92 int mlx90394_get_decoder(const struct device *dev, const struct sensor_decoder_api **decoder); 93 void mlx90394_submit(const struct device *dev, struct rtio_iodev_sqe *iodev_sqe); 94 #endif 95 96 #endif /* ZEPHYR_DRIVERS_SENSOR_MLX90394_MLX90394_H_ */ 97
