4  * SPDX-License-Identifier: Apache-2.0
44 	const struct max11102_17_config *config = dev->config;  in max11102_17_switch_channel()
45 	struct max11102_17_data *data = dev->data;  in max11102_17_switch_channel()
58 	memcpy(&bus, &config->bus, sizeof(bus));  in max11102_17_switch_channel()
67 	gpio_pin_set_dt(&config->gpio_chsel, data->current_channel_id);  in max11102_17_switch_channel()
69 	result = spi_read_dt(&config->bus, &rx);  in max11102_17_switch_channel()
81 	const struct max11102_17_config *config = dev->config;  in max11102_17_channel_setup()
83 	LOG_DBG("read from ADC channel %i", channel_cfg->channel_id);  in max11102_17_channel_setup()
85 	if (channel_cfg->reference != ADC_REF_EXTERNAL0) {  in max11102_17_channel_setup()
86 		LOG_ERR("invalid reference %i", channel_cfg->reference);  in max11102_17_channel_setup()
87 		return -EINVAL;  in max11102_17_channel_setup()
90 	if (channel_cfg->gain != ADC_GAIN_1) {  in max11102_17_channel_setup()
91 		LOG_ERR("invalid gain %i", channel_cfg->gain);  in max11102_17_channel_setup()
92 		return -EINVAL;  in max11102_17_channel_setup()
95 	if (channel_cfg->acquisition_time != ADC_ACQ_TIME_DEFAULT) {  in max11102_17_channel_setup()
96 		LOG_ERR("invalid acquisition time %i", channel_cfg->acquisition_time);  in max11102_17_channel_setup()
97 		return -EINVAL;  in max11102_17_channel_setup()
100 	if (channel_cfg->differential != 0) {  in max11102_17_channel_setup()
102 		return -EINVAL;  in max11102_17_channel_setup()
105 	if (channel_cfg->channel_id > config->channel_count) {  in max11102_17_channel_setup()
106 		LOG_ERR("invalid channel selection %i", channel_cfg->channel_id);  in max11102_17_channel_setup()
107 		return -EINVAL;  in max11102_17_channel_setup()
117 	if (sequence->options) {  in max11102_17_validate_buffer_size()
118 		necessary *= (1 + sequence->options->extra_samplings);  in max11102_17_validate_buffer_size()
121 	if (sequence->buffer_size < necessary) {  in max11102_17_validate_buffer_size()
122 		return -ENOMEM;  in max11102_17_validate_buffer_size()
131 	const struct max11102_17_config *config = dev->config;  in max11102_17_validate_sequence()
132 	struct max11102_17_data *data = dev->data;  in max11102_17_validate_sequence()
134 	const size_t channel_maximum = 8*sizeof(sequence->channels);  in max11102_17_validate_sequence()
136 	if (sequence->resolution != config->resolution) {  in max11102_17_validate_sequence()
138 		return -EINVAL;  in max11102_17_validate_sequence()
142 		if ((BIT(i) & sequence->channels) == 0) {  in max11102_17_validate_sequence()
146 		if (i > config->channel_count) {  in max11102_17_validate_sequence()
148 			return -EINVAL;  in max11102_17_validate_sequence()
152 		data->sequence_channel_id = i;  in max11102_17_validate_sequence()
157 		return -EINVAL;  in max11102_17_validate_sequence()
162 		return -EINVAL;  in max11102_17_validate_sequence()
165 	if (sequence->oversampling) {  in max11102_17_validate_sequence()
167 		return -EINVAL;  in max11102_17_validate_sequence()
178 		data->buffer = data->buffer_ptr;  in adc_context_update_buffer_pointer()
186 	data->buffer_ptr = data->buffer;  in adc_context_start_sampling()
187 	k_sem_give(&data->acquire_signal);  in adc_context_start_sampling()
194 	struct max11102_17_data *data = dev->data;  in max11102_17_adc_start_read()
203 	data->buffer = sequence->buffer;  in max11102_17_adc_start_read()
205 	adc_context_start_read(&data->ctx, sequence);  in max11102_17_adc_start_read()
208 		result = adc_context_wait_for_completion(&data->ctx);  in max11102_17_adc_start_read()
216 	const struct max11102_17_config *config = dev->config;  in max11102_17_read_sample()
218 	size_t trailing_bits = 15 - config->resolution;  in max11102_17_read_sample()
229 	result = spi_read_dt(&config->bus, &rx);  in max11102_17_read_sample()
240 	*sample = *sample & GENMASK(config->resolution, 0);  in max11102_17_read_sample()
249 	struct max11102_17_data *data = dev->data;  in max11102_17_adc_perform_read()
251 	k_sem_take(&data->acquire_signal, K_FOREVER);  in max11102_17_adc_perform_read()
253 	if (data->sequence_channel_id != data->current_channel_id) {  in max11102_17_adc_perform_read()
255 		data->current_channel_id = data->sequence_channel_id;  in max11102_17_adc_perform_read()
259 	result = max11102_17_read_sample(dev, data->buffer);  in max11102_17_adc_perform_read()
262 		adc_context_complete(&data->ctx, result);  in max11102_17_adc_perform_read()
266 	data->buffer++;  in max11102_17_adc_perform_read()
268 	adc_context_on_sampling_done(&data->ctx, dev);  in max11102_17_adc_perform_read()
278 	struct max11102_17_data *data = dev->data;  in max11102_17_adc_read_async()
280 	adc_context_lock(&data->ctx, true, async);  in max11102_17_adc_read_async()
282 	adc_context_release(&data->ctx, result);  in max11102_17_adc_read_async()
290 	struct max11102_17_data *data = dev->data;  in max11102_17_read()
292 	adc_context_lock(&data->ctx, false, NULL);  in max11102_17_read()
294 	adc_context_release(&data->ctx, result);  in max11102_17_read()
303 	struct max11102_17_data *data = dev->data;  in max11102_17_read()
305 	adc_context_lock(&data->ctx, false, NULL);  in max11102_17_read()
308 	while (result == 0 && k_sem_take(&data->ctx.sync, K_NO_WAIT) != 0) {  in max11102_17_read()
312 	adc_context_release(&data->ctx, result);  in max11102_17_read()
333 	const struct max11102_17_config *config = dev->config;  in max11102_17_init()
334 	struct max11102_17_data *data = dev->data;  in max11102_17_init()
337 	adc_context_init(&data->ctx);  in max11102_17_init()
339 	k_sem_init(&data->acquire_signal, 0, 1);  in max11102_17_init()
341 	if (!spi_is_ready_dt(&config->bus)) {  in max11102_17_init()
343 		return -ENODEV;  in max11102_17_init()
346 	switch (config->channel_count) {  in max11102_17_init()
348 		if (config->gpio_chsel.port != NULL) {  in max11102_17_init()
350 			return -EINVAL;  in max11102_17_init()
354 		if (config->gpio_chsel.port == NULL) {  in max11102_17_init()
356 			return -EINVAL;  in max11102_17_init()
359 		result = gpio_pin_configure_dt(&config->gpio_chsel, GPIO_OUTPUT_INACTIVE);  in max11102_17_init()
366 		LOG_ERR("invalid number of channels (%i)", config->channel_count);  in max11102_17_init()
367 		return -EINVAL;  in max11102_17_init()
370 	data->current_channel_id = 0;  in max11102_17_init()
374 		&data->thread, data->stack, CONFIG_ADC_MAX11102_17_ACQUISITION_THREAD_STACK_SIZE,  in max11102_17_init()
380 	/* power up time is one conversion cycle */  in max11102_17_init()
383 		LOG_ERR("unable to read dummy sample for power up timing");  in max11102_17_init()
387 	adc_context_unlock_unconditionally(&data->ctx);  in max11102_17_init()