6  * SPDX-License-Identifier: Apache-2.0
81 	const struct ads1112_config *config = dev->config;  in ads1112_read_reg()
83 	int rc = i2c_read_dt(&config->bus, buf, sizeof(buf));  in ads1112_read_reg()  local
92 	return rc;  in ads1112_read_reg()
95 static int ads1112_write_reg(const struct device *dev, uint8_t reg)  in ads1112_write_reg()  argument
97 	uint8_t msg[1] = {reg};  in ads1112_write_reg()
98 	const struct ads1112_config *config = dev->config;  in ads1112_write_reg()
104 	return i2c_write_dt(&config->bus, msg, sizeof(msg));  in ads1112_write_reg()
109 	struct ads1112_data *data = dev->data;  in ads1112_acq_time_to_dr()
110 	int odr = -EINVAL;  in ads1112_acq_time_to_dr()
117 		return -EINVAL;  in ads1112_acq_time_to_dr()
145 	data->ready_time = K_USEC(ready_time_us + 10);  in ads1112_acq_time_to_dr()
152 	int rc;  in ads1112_wait_data_ready()  local
153 	struct ads1112_data *data = dev->data;  in ads1112_wait_data_ready()
155 	k_sleep(data->ready_time);  in ads1112_wait_data_ready()
158 	rc = ads1112_read_reg(dev, ADS1112_REG_CONFIG, &status);  in ads1112_wait_data_ready()
159 	if (rc != 0) {  in ads1112_wait_data_ready()
160 		return rc;  in ads1112_wait_data_ready()
166 		rc = ads1112_read_reg(dev, ADS1112_REG_CONFIG, &status);  in ads1112_wait_data_ready()
167 		if (rc != 0) {  in ads1112_wait_data_ready()
168 			return rc;  in ads1112_wait_data_ready()
188 	struct ads1112_data *data = dev->data;  in ads1112_channel_setup()
192 	if (channel_cfg->channel_id != 0) {  in ads1112_channel_setup()
193 		return -EINVAL;  in ads1112_channel_setup()
196 	if (channel_cfg->differential) {  in ads1112_channel_setup()
197 		if (channel_cfg->input_positive == 0 && channel_cfg->input_negative == 1) {  in ads1112_channel_setup()
199 		} else if (channel_cfg->input_positive == 2 && channel_cfg->input_negative == 3) {  in ads1112_channel_setup()
202 			return -EINVAL;  in ads1112_channel_setup()
205 		if (channel_cfg->input_positive == 0) {  in ads1112_channel_setup()
207 		} else if (channel_cfg->input_positive == 1) {  in ads1112_channel_setup()
209 		} else if (channel_cfg->input_positive == 2) {  in ads1112_channel_setup()
212 			return -EINVAL;  in ads1112_channel_setup()
216 	data->differential = channel_cfg->differential;  in ads1112_channel_setup()
218 	dr = ads1112_acq_time_to_dr(dev, channel_cfg->acquisition_time);  in ads1112_channel_setup()
225 	switch (channel_cfg->gain) {  in ads1112_channel_setup()
239 		return -EINVAL;  in ads1112_channel_setup()
251 	if (sequence->options) {  in ads1112_validate_buffer_size()
252 		needed *= (1 + sequence->options->extra_samplings);  in ads1112_validate_buffer_size()
255 	if (sequence->buffer_size < needed) {  in ads1112_validate_buffer_size()
256 		LOG_ERR("Insufficient buffer %i < %i", sequence->buffer_size, needed);  in ads1112_validate_buffer_size()
257 		return -ENOMEM;  in ads1112_validate_buffer_size()
265 	if (sequence->channels != BIT(0)) {  in ads1112_validate_sequence()
266 		LOG_ERR("Invalid Channel 0x%x", sequence->channels);  in ads1112_validate_sequence()
267 		return -EINVAL;  in ads1112_validate_sequence()
270 	if (sequence->oversampling) {  in ads1112_validate_sequence()
272 		return -EINVAL;  in ads1112_validate_sequence()
283 		data->buffer = data->buffer_ptr;  in adc_context_update_buffer_pointer()
291 	data->buffer_ptr = data->buffer;  in adc_context_start_sampling()
292 	k_sem_give(&data->acq_sem);  in adc_context_start_sampling()
298 	int rc = 0;  in ads1112_adc_start_read()  local
299 	struct ads1112_data *data = dev->data;  in ads1112_adc_start_read()
301 	rc = ads1112_validate_sequence(dev, sequence);  in ads1112_adc_start_read()
302 	if (rc != 0) {  in ads1112_adc_start_read()
303 		return rc;  in ads1112_adc_start_read()
306 	data->buffer = sequence->buffer;  in ads1112_adc_start_read()
308 	adc_context_start_read(&data->ctx, sequence);  in ads1112_adc_start_read()
311 		rc = adc_context_wait_for_completion(&data->ctx);  in ads1112_adc_start_read()
313 	return rc;  in ads1112_adc_start_read()
318 	int rc;  in ads1112_adc_perform_read()  local
319 	struct ads1112_data *data = dev->data;  in ads1112_adc_perform_read()
321 	k_sem_take(&data->acq_sem, K_FOREVER);  in ads1112_adc_perform_read()
323 	rc = ads1112_wait_data_ready(dev);  in ads1112_adc_perform_read()
324 	if (rc != 0) {  in ads1112_adc_perform_read()
325 		adc_context_complete(&data->ctx, rc);  in ads1112_adc_perform_read()
326 		return rc;  in ads1112_adc_perform_read()
329 	rc = ads1112_read_sample(dev, data->buffer);  in ads1112_adc_perform_read()
330 	if (rc != 0) {  in ads1112_adc_perform_read()
331 		adc_context_complete(&data->ctx, rc);  in ads1112_adc_perform_read()
332 		return rc;  in ads1112_adc_perform_read()
334 	data->buffer++;  in ads1112_adc_perform_read()
336 	adc_context_on_sampling_done(&data->ctx, dev);  in ads1112_adc_perform_read()
338 	return rc;  in ads1112_adc_perform_read()
343 	int rc;  in ads1112_read()  local
344 	struct ads1112_data *data = dev->data;  in ads1112_read()
346 	adc_context_lock(&data->ctx, false, NULL);  in ads1112_read()
347 	rc = ads1112_adc_start_read(dev, sequence, false);  in ads1112_read()
349 	while (rc == 0 && k_sem_take(&data->ctx.sync, K_NO_WAIT) != 0) {  in ads1112_read()
350 		rc = ads1112_adc_perform_read(dev);  in ads1112_read()
353 	adc_context_release(&data->ctx, rc);  in ads1112_read()
354 	return rc;  in ads1112_read()
359 	int rc = 0;  in ads1112_init()  local
360 	const struct ads1112_config *config = dev->config;  in ads1112_init()
361 	struct ads1112_data *data = dev->data;  in ads1112_init()
363 	adc_context_init(&data->ctx);  in ads1112_init()
365 	k_sem_init(&data->acq_sem, 0, 1);  in ads1112_init()
367 	if (!device_is_ready(config->bus.bus)) {  in ads1112_init()
368 		return -ENODEV;  in ads1112_init()
371 	rc = ads1112_write_reg(dev, ADS1112_DEFAULT_CONFIG);  in ads1112_init()
372 	if (rc) {  in ads1112_init()
374 		return rc;  in ads1112_init()
377 	adc_context_unlock_unconditionally(&data->ctx);  in ads1112_init()
379 	return rc;  in ads1112_init()