1 // SPDX-License-Identifier: GPL-2.0
3  * 3-axis accelerometer driver supporting following Bosch-Sensortec chips:
4  *  - BMI088
6  * Copyright (c) 2018-2021, Topic Embedded Products
21 #include "bmi088-accel.h"
96 /* Available OSR (over sampling rate) sets the 3dB cut-off frequency */
137 	/* Mark the RESET as volatile too, it is self-clearing */
160 	ret = regmap_write(data->regmap, BMI088_ACCEL_REG_PWR_CTRL, 0x4);  in bmi088_accel_power_up()
164 	/* Datasheet recommends to wait at least 5ms before communication */  in bmi088_accel_power_up()
168 	ret = regmap_write(data->regmap, BMI088_ACCEL_REG_PWR_CONF, 0x0);  in bmi088_accel_power_up()
172 	/* Recommended at least 1ms before further communication */  in bmi088_accel_power_up()
183 	ret = regmap_write(data->regmap, BMI088_ACCEL_REG_PWR_CONF, 0x3);  in bmi088_accel_power_down()
187 	/* Recommended at least 1ms before further communication */  in bmi088_accel_power_down()
191 	ret = regmap_write(data->regmap, BMI088_ACCEL_REG_PWR_CTRL, 0x0);  in bmi088_accel_power_down()
195 	/* Datasheet recommends to wait at least 5ms before communication */  in bmi088_accel_power_down()
207 	ret = regmap_read(data->regmap, BMI088_ACCEL_REG_ACC_CONF,  in bmi088_accel_get_sample_freq()
213 	value -= BMI088_ACCEL_MODE_ODR_12_5;  in bmi088_accel_get_sample_freq()
216 	if (value >= ARRAY_SIZE(bmi088_sample_freqs) - 1)  in bmi088_accel_get_sample_freq()
217 		return -EINVAL;  in bmi088_accel_get_sample_freq()
235 		return -EINVAL;  in bmi088_accel_set_sample_freq()
239 	return regmap_update_bits(data->regmap, BMI088_ACCEL_REG_ACC_CONF,  in bmi088_accel_set_sample_freq()
248 		if (val  == data->chip_info->scale_table[i][0] &&  in bmi088_accel_set_scale()
249 		    val2 == data->chip_info->scale_table[i][1])  in bmi088_accel_set_scale()
253 		return -EINVAL;  in bmi088_accel_set_scale()
255 	return regmap_write(data->regmap, BMI088_ACCEL_REG_ACC_RANGE, i);  in bmi088_accel_set_scale()
263 	ret = regmap_bulk_read(data->regmap, BMI088_ACCEL_REG_TEMP,  in bmi088_accel_get_temp()
264 			       &data->buffer, sizeof(__be16));  in bmi088_accel_get_temp()
268 	/* data->buffer is cacheline aligned */  in bmi088_accel_get_temp()
269 	temp = be16_to_cpu(*(__be16 *)data->buffer);  in bmi088_accel_get_temp()
283 	ret = regmap_bulk_read(data->regmap,  in bmi088_accel_get_axis()
284 			       BMI088_ACCEL_AXIS_TO_REG(chan->scan_index),  in bmi088_accel_get_axis()
285 			       data->buffer, sizeof(__le16));  in bmi088_accel_get_axis()
289 	raw_val = le16_to_cpu(*(__le16 *)data->buffer);  in bmi088_accel_get_axis()
300 	struct device *dev = regmap_get_device(data->regmap);  in bmi088_accel_read_raw()
306 		switch (chan->type) {  in bmi088_accel_read_raw()
330 			return -EINVAL;  in bmi088_accel_read_raw()
333 		switch (chan->type) {  in bmi088_accel_read_raw()
339 			return -EINVAL;  in bmi088_accel_read_raw()
342 		switch (chan->type) {  in bmi088_accel_read_raw()
352 			ret = regmap_read(data->regmap,  in bmi088_accel_read_raw()
358 			*val  = data->chip_info->scale_table[reg][0];  in bmi088_accel_read_raw()
359 			*val2 = data->chip_info->scale_table[reg][1];  in bmi088_accel_read_raw()
364 			return -EINVAL;  in bmi088_accel_read_raw()
377 	return -EINVAL;  in bmi088_accel_read_raw()
395 		*vals = (const int *)data->chip_info->scale_table;  in bmi088_accel_read_avail()
405 		return -EINVAL;  in bmi088_accel_read_avail()
414 	struct device *dev = regmap_get_device(data->regmap);  in bmi088_accel_write_raw()
437 		return -EINVAL;  in bmi088_accel_write_raw()
459 		.scan_index = -1,
469 		.name = "bmi085-accel",
476 		.name = "bmi088-accel",
483 		.name = "bmi090l-accel",
504 	struct device *dev = regmap_get_device(data->regmap);  in bmi088_accel_chip_init()
509 		return -ENODEV;  in bmi088_accel_chip_init()
512 	regmap_read(data->regmap, BMI088_ACCEL_REG_INT_STATUS, &val);  in bmi088_accel_chip_init()
518 	ret = regmap_write(data->regmap, BMI088_ACCEL_REG_RESET,  in bmi088_accel_chip_init()
526 	regmap_read(data->regmap, BMI088_ACCEL_REG_INT_STATUS, &val);  in bmi088_accel_chip_init()
529 	ret = regmap_read(data->regmap, BMI088_ACCEL_REG_CHIP_ID, &val);  in bmi088_accel_chip_init()
541 		data->chip_info = &bmi088_accel_chip_info_tbl[type];  in bmi088_accel_chip_init()
543 		data->chip_info = &bmi088_accel_chip_info_tbl[i];  in bmi088_accel_chip_init()
560 		return -ENOMEM;  in bmi088_accel_core_probe()
565 	data->regmap = regmap;  in bmi088_accel_core_probe()
571 	indio_dev->channels = data->chip_info->channels;  in bmi088_accel_core_probe()
572 	indio_dev->num_channels = data->chip_info->num_channels;  in bmi088_accel_core_probe()
573 	indio_dev->name = data->chip_info->name;  in bmi088_accel_core_probe()
574 	indio_dev->available_scan_masks = bmi088_accel_scan_masks;  in bmi088_accel_core_probe()
575 	indio_dev->modes = INDIO_DIRECT_MODE;  in bmi088_accel_core_probe()
576 	indio_dev->info = &bmi088_accel_info;  in bmi088_accel_core_probe()