| /* 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 <zephyr/drivers/sensor.h> |
| #include <zephyr/kernel.h> |
| #include <zephyr/device.h> |
| #include <zephyr/init.h> |
| #include <zephyr/sys/byteorder.h> |
| #include <zephyr/sys/__assert.h> |
| #include <zephyr/logging/log.h> |
| |
| #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_NODE_HAS_COMPAT(DT_DRV_INST(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 |
