5  * SPDX-License-Identifier: Apache-2.0
8  * https://www.mouser.hk/datasheet/2/783/BST-BMP180-DS000-1509579.pdf
45 	int16_t mb;  member
64 	const struct bmp180_config *cfg = dev->config;  in bmp180_bus_check()
66 	return i2c_is_ready_dt(&cfg->i2c) ? 0 : -ENODEV;  in bmp180_bus_check()
72 	const struct bmp180_config *cfg = dev->config;  in bmp180_reg_read()
74 	return i2c_burst_read_dt(&cfg->i2c, start, buf, size);  in bmp180_reg_read()
80 	const struct bmp180_config *cfg = dev->config;  in bmp180_reg_write()
82 	return i2c_reg_write_byte_dt(&cfg->i2c, reg, val);  in bmp180_reg_write()
89 	struct bmp180_data *data = dev->data;  in bmp180_attr_set_oversampling()
91 	/* Value must be a positive value 0-3 */  in bmp180_attr_set_oversampling()
93 		return -EINVAL;  in bmp180_attr_set_oversampling()
96 	data->osr_pressure = val;  in bmp180_attr_set_oversampling()
98 	return 0;  in bmp180_attr_set_oversampling()
113 		return -EBUSY;  in bmp180_attr_set()
120 		ret = bmp180_attr_set_oversampling(dev, chan, val->val1);  in bmp180_attr_set()
125 		ret = -EINVAL;  in bmp180_attr_set()
141 	 * descripted in the data-sheet in case the register not yet ready wait again  in bmp180_conv_ready()
152 		if ((ctrlreg & BMP180_STATUS_CMD_RDY) == 0) {  in bmp180_conv_ready()
156 		--retry;  in bmp180_conv_ready()
157 		if (retry == 0) {  in bmp180_conv_ready()
158 			return -ETIMEDOUT;  in bmp180_conv_ready()
162 	return 0;  in bmp180_conv_ready()
169 	struct bmp180_data *data = dev->data;  in read_raw_temperature()
188 	data->raw_temp = (int32_t)(sys_get_be16(reg16));  in read_raw_temperature()
189 	data->comp_temp = 0;  in read_raw_temperature()
191 	return 0;  in read_raw_temperature()
201 	struct bmp180_data *data = dev->data;  in read_raw_pressure()
203 	switch (data->osr_pressure) {  in read_raw_pressure()
221 		return -EINVAL;  in read_raw_pressure()
241 	pressure >>= (8 - data->osr_pressure);  in read_raw_pressure()
242 	data->raw_press = pressure;  in read_raw_pressure()
244 	return 0;  in read_raw_pressure()
250 	int ret = 0;  in bmp180_sample_fetch()
259 		return -EBUSY;  in bmp180_sample_fetch()
266 	if (ret < 0) {  in bmp180_sample_fetch()
281 	struct bmp180_cal_data *cal = &data->cal;  in bmp180_compensate_temp()
283 	partial_data1 = (data->raw_temp - cal->ac6) * cal->ac5 / 0x8000;  in bmp180_compensate_temp()
284 	partial_data2 = cal->mc * 0x800 / (partial_data1 + cal->md);  in bmp180_compensate_temp()
287 	data->comp_temp = (partial_data1 + partial_data2);  in bmp180_compensate_temp()
293 	struct bmp180_data *data = dev->data;  in bmp180_temp_channel_get()
295 	if (data->comp_temp == 0) {  in bmp180_temp_channel_get()
299 	float ftmp = ((data->comp_temp + 8) >> 4) / 10.0;  in bmp180_temp_channel_get()
302 	val->val1 = tmp / 1000000;  in bmp180_temp_channel_get()
303 	val->val2 = tmp % 1000000;  in bmp180_temp_channel_get()
305 	return 0;  in bmp180_temp_channel_get()
318 	int32_t raw_pressure = data->raw_press;  in bmp180_compensate_press()
319 	struct bmp180_cal_data *cal = &data->cal;  in bmp180_compensate_press()
321 	partial_B6 = data->comp_temp - 4000;  in bmp180_compensate_press()
322 	partial_X1 = cal->b2 * partial_B6 * (float)(1.0f * partial_B6 / 0x800000);  in bmp180_compensate_press()
323 	partial_X2 = (cal->ac2 * partial_B6) / 0x800;  in bmp180_compensate_press()
325 	partial_B3 = (((cal->ac1 * 4 + partial_X3) << data->osr_pressure) + 2) / 4;  in bmp180_compensate_press()
327 	partial_X1 = (cal->ac3 * partial_B6) / 0x2000;  in bmp180_compensate_press()
328 	partial_X2 = cal->b1 * partial_B6 * (float)(1.0f * partial_B6 / 0x8000000);  in bmp180_compensate_press()
330 	partial_B4 = (uint64_t)(cal->ac4 * ((int64_t)(partial_X3) + 32768)) >> 15;  in bmp180_compensate_press()
331 	partial_B7 = (uint64_t)(raw_pressure - partial_B3) * (50000 >> data->osr_pressure);  in bmp180_compensate_press()
335 	partial_X1 = comp_press * (float)(1.0f * comp_press / 0x10000);  in bmp180_compensate_press()
336 	partial_X1 = (partial_X1 * 3038) / 0x10000;  in bmp180_compensate_press()
337 	partial_X2 = ((int32_t)(-7357 * comp_press)) / 0x10000;  in bmp180_compensate_press()
347 	struct bmp180_data *data = dev->data;  in bmp180_press_channel_get()
349 	if (data->comp_temp == 0) {  in bmp180_press_channel_get()
358 	val->val1 = tmp / 1000;  in bmp180_press_channel_get()
359 	val->val2 = (tmp % 1000) * 1000;  in bmp180_press_channel_get()
361 	return 0;  in bmp180_press_channel_get()
379 		return -ENOTSUP;  in bmp180_channel_get()
382 	return 0;  in bmp180_channel_get()
388 	struct bmp180_data *data = dev->data;  in bmp180_get_calibration_data()
389 	struct bmp180_cal_data *cal = &data->cal;  in bmp180_get_calibration_data()
392 			    sizeof(struct bmp180_cal_data)) < 0) {  in bmp180_get_calibration_data()
393 		return -EIO;  in bmp180_get_calibration_data()
396 	cal->ac1 = BSWAP_s16(cal->ac1);  in bmp180_get_calibration_data()
397 	cal->ac2 = BSWAP_s16(cal->ac2);  in bmp180_get_calibration_data()
398 	cal->ac3 = BSWAP_s16(cal->ac3);  in bmp180_get_calibration_data()
399 	cal->ac4 = BSWAP_u16(cal->ac4);  in bmp180_get_calibration_data()
400 	cal->ac5 = BSWAP_u16(cal->ac5);  in bmp180_get_calibration_data()
401 	cal->ac6 = BSWAP_u16(cal->ac6);  in bmp180_get_calibration_data()
402 	cal->b1 = BSWAP_s16(cal->b1);  in bmp180_get_calibration_data()
403 	cal->b2 = BSWAP_s16(cal->b2);  in bmp180_get_calibration_data()
404 	cal->mb = BSWAP_s16(cal->mb);  in bmp180_get_calibration_data()
405 	cal->mc = BSWAP_s16(cal->mc);  in bmp180_get_calibration_data()
406 	cal->md = BSWAP_s16(cal->md);  in bmp180_get_calibration_data()
408 	return 0;  in bmp180_get_calibration_data()
416 	return 0;  in bmp180_pm_action()
428 	uint8_t val = 0U;  in bmp180_init()
430 	if (bmp180_bus_check(dev) < 0) {  in bmp180_init()
432 		return -ENODEV;  in bmp180_init()
436 	if (bmp180_reg_write(dev, BMP180_REG_CMD, BMP180_CMD_SOFT_RESET) < 0) {  in bmp180_init()
438 		return -EIO;  in bmp180_init()
443 	if (bmp180_reg_read(dev, BMP180_REG_CHIPID, &val, 1) < 0) {  in bmp180_init()
445 		return -EIO;  in bmp180_init()
449 		LOG_ERR("Unsupported chip detected (0x%x)!", val);  in bmp180_init()
450 		return -ENODEV;  in bmp180_init()
454 	if (bmp180_get_calibration_data(dev) < 0) {  in bmp180_init()
456 		return -EIO;  in bmp180_init()
459 	return 0;  in bmp180_init()