/* ST Microelectronics LPS2XDF pressure and temperature sensor * * Copyright (c) 2023 STMicroelectronics * Copyright (c) 2023 PHYTEC Messtechnik GmbH * * SPDX-License-Identifier: Apache-2.0 * * Datasheet: * https://www.st.com/resource/en/datasheet/lps22df.pdf * https://www.st.com/resource/en/datasheet/lps28df.pdf */ #include #include #include #include #include #include #include #include "lps2xdf.h" #if DT_HAS_COMPAT_STATUS_OKAY(st_lps22df) #include "lps22df.h" #endif #if DT_HAS_COMPAT_STATUS_OKAY(st_lps28dfw) #include "lps28dfw.h" #endif LOG_MODULE_REGISTER(LPS2XDF, CONFIG_SENSOR_LOG_LEVEL); static const uint16_t lps2xdf_map[] = {0, 1, 4, 10, 25, 50, 75, 100, 200}; static int lps2xdf_odr_set(const struct device *dev, uint16_t freq) { int odr; const struct lps2xdf_config *const cfg = dev->config; const struct lps2xdf_chip_api *chip_api = cfg->chip_api; for (odr = 0; odr < ARRAY_SIZE(lps2xdf_map); odr++) { if (freq == lps2xdf_map[odr]) { break; } } if (odr == ARRAY_SIZE(lps2xdf_map)) { LOG_DBG("bad frequency"); return -EINVAL; } if (chip_api->mode_set_odr_raw(dev, odr)) { LOG_DBG("failed to set sampling rate"); return -EIO; } return 0; } static int lps2xdf_attr_set(const struct device *dev, enum sensor_channel chan, enum sensor_attribute attr, const struct sensor_value *val) { if (chan != SENSOR_CHAN_ALL) { LOG_WRN("attr_set() not supported on this channel."); return -ENOTSUP; } switch (attr) { case SENSOR_ATTR_SAMPLING_FREQUENCY: return lps2xdf_odr_set(dev, val->val1); default: LOG_DBG("operation not supported."); return -ENOTSUP; } return 0; } static inline void lps2xdf_press_convert(const struct device *dev, struct sensor_value *val, int32_t raw_val) { const struct lps2xdf_config *const cfg = dev->config; int32_t press_tmp = raw_val >> 8; /* raw value is left aligned (24 msb) */ int divider; /* Pressure sensitivity is: * - 4096 LSB/hPa for Full-Scale of 260 - 1260 hPa: * - 2048 LSB/hPa for Full-Scale of 260 - 4060 hPa: * Also convert hPa into kPa */ if (cfg->fs == 0) { divider = 40960; } else { divider = 20480; } val->val1 = press_tmp / divider; /* For the decimal part use (3125 / 128) as a factor instead of * (1000000 / 40960) to avoid int32 overflow */ val->val2 = (press_tmp % divider) * 3125 / 128; } static inline void lps2xdf_temp_convert(struct sensor_value *val, int16_t raw_val) { /* Temperature sensitivity is 100 LSB/deg C */ val->val1 = raw_val / 100; val->val2 = ((int32_t)raw_val % 100) * 10000; } static int lps2xdf_channel_get(const struct device *dev, enum sensor_channel chan, struct sensor_value *val) { struct lps2xdf_data *data = dev->data; if (chan == SENSOR_CHAN_PRESS) { lps2xdf_press_convert(dev, val, data->sample_press); } else if (chan == SENSOR_CHAN_AMBIENT_TEMP) { lps2xdf_temp_convert(val, data->sample_temp); } else { return -ENOTSUP; } return 0; } static int lps2xdf_sample_fetch(const struct device *dev, enum sensor_channel chan) { const struct lps2xdf_config *const cfg = dev->config; const struct lps2xdf_chip_api *chip_api = cfg->chip_api; __ASSERT_NO_MSG(chan == SENSOR_CHAN_ALL); return chip_api->sample_fetch(dev, chan); } static const struct sensor_driver_api lps2xdf_driver_api = { .attr_set = lps2xdf_attr_set, .sample_fetch = lps2xdf_sample_fetch, .channel_get = lps2xdf_channel_get, #if CONFIG_LPS2XDF_TRIGGER .trigger_set = lps2xdf_trigger_set, #endif }; #ifdef CONFIG_LPS2XDF_TRIGGER #define LPS2XDF_CFG_IRQ(inst) \ .trig_enabled = true, \ .gpio_int = GPIO_DT_SPEC_INST_GET(inst, drdy_gpios), \ .drdy_pulsed = DT_INST_PROP(inst, drdy_pulsed) #else #define LPS2XDF_CFG_IRQ(inst) #endif /* CONFIG_LPS2XDF_TRIGGER */ #define LPS2XDF_CONFIG_COMMON(inst, name) \ .odr = DT_INST_PROP(inst, odr), \ .lpf = DT_INST_PROP(inst, lpf), \ .avg = DT_INST_PROP(inst, avg), \ .chip_api = &name##_chip_api, \ IF_ENABLED(DT_INST_NODE_HAS_COMPAT(inst, st_lps28dfw), \ (.fs = DT_INST_PROP(inst, fs),)) \ IF_ENABLED(DT_INST_NODE_HAS_PROP(inst, drdy_gpios), \ (LPS2XDF_CFG_IRQ(inst))) #define LPS2XDF_SPI_OPERATION (SPI_WORD_SET(8) | SPI_OP_MODE_MASTER | \ SPI_MODE_CPOL | SPI_MODE_CPHA) #define LPS2XDF_CONFIG_SPI(inst, name) \ { \ STMEMSC_CTX_SPI(&lps2xdf_config_##name##_##inst.stmemsc_cfg), \ .stmemsc_cfg = { \ .spi = SPI_DT_SPEC_INST_GET(inst, LPS2XDF_SPI_OPERATION, 0), \ }, \ LPS2XDF_CONFIG_COMMON(inst, name) \ } #define LPS2XDF_CONFIG_I2C(inst, name) \ { \ STMEMSC_CTX_I2C(&lps2xdf_config_##name##_##inst.stmemsc_cfg), \ .stmemsc_cfg = { \ .i2c = I2C_DT_SPEC_INST_GET(inst), \ }, \ LPS2XDF_CONFIG_COMMON(inst, name) \ } #define LPS2XDF_CONFIG_I3C(inst, name) \ { \ STMEMSC_CTX_I3C(&lps2xdf_config_##name##_##inst.stmemsc_cfg), \ .stmemsc_cfg = { \ .i3c = &lps2xdf_data_##name##_##inst.i3c_dev, \ }, \ .i3c.bus = DEVICE_DT_GET(DT_INST_BUS(inst)), \ .i3c.dev_id = I3C_DEVICE_ID_DT_INST(inst), \ LPS2XDF_CONFIG_COMMON(inst, name) \ } #define LPS2XDF_CONFIG_I3C_OR_I2C(inst, name) \ COND_CODE_0(DT_INST_PROP_BY_IDX(inst, reg, 1), \ (LPS2XDF_CONFIG_I2C(inst, name)), \ (LPS2XDF_CONFIG_I3C(inst, name))) #define LPS2XDF_DEFINE(inst, name) \ static struct lps2xdf_data lps2xdf_data_##name##_##inst; \ static const struct lps2xdf_config lps2xdf_config_##name##_##inst = COND_CODE_1( \ DT_INST_ON_BUS(inst, spi), \ (LPS2XDF_CONFIG_SPI(inst, name)), \ (COND_CODE_1(DT_INST_ON_BUS(inst, i3c), \ (LPS2XDF_CONFIG_I3C_OR_I2C(inst, name)), \ (LPS2XDF_CONFIG_I2C(inst, name))))); \ \ SENSOR_DEVICE_DT_INST_DEFINE(inst, name##_init, NULL, &lps2xdf_data_##name##_##inst, \ &lps2xdf_config_##name##_##inst, POST_KERNEL, \ CONFIG_SENSOR_INIT_PRIORITY, &lps2xdf_driver_api); #define DT_DRV_COMPAT st_lps22df DT_INST_FOREACH_STATUS_OKAY_VARGS(LPS2XDF_DEFINE, DT_DRV_COMPAT) #undef DT_DRV_COMPAT #define DT_DRV_COMPAT st_lps28dfw DT_INST_FOREACH_STATUS_OKAY_VARGS(LPS2XDF_DEFINE, DT_DRV_COMPAT) #undef DT_DRV_COMPAT