4  * SPDX-License-Identifier: Apache-2.0
10 #include <zephyr/dt-bindings/adc/nrf-adc.h>
19 /* Ensure that definitions in nrf-adc.h match MDK. */
28 	     "Definitions from nrf-adc.h do not match those from nrf_adc.h");
50 	uint8_t channel_id = channel_cfg->channel_id;  in adc_nrfx_channel_setup()
54 		return -EINVAL;  in adc_nrfx_channel_setup()
57 	if (channel_cfg->acquisition_time != ADC_ACQ_TIME_DEFAULT) {  in adc_nrfx_channel_setup()
58 		LOG_ERR("Selected ADC acquisition time is not valid");  in adc_nrfx_channel_setup()
59 		return -EINVAL;  in adc_nrfx_channel_setup()
62 	if (channel_cfg->differential) {  in adc_nrfx_channel_setup()
63 		LOG_ERR("Differential channels are not supported");  in adc_nrfx_channel_setup()
64 		return -EINVAL;  in adc_nrfx_channel_setup()
67 	switch (channel_cfg->gain) {  in adc_nrfx_channel_setup()
69 		config->scaling = NRF_ADC_CONFIG_SCALING_INPUT_ONE_THIRD;  in adc_nrfx_channel_setup()
72 		config->scaling = NRF_ADC_CONFIG_SCALING_INPUT_TWO_THIRDS;  in adc_nrfx_channel_setup()
75 		config->scaling = NRF_ADC_CONFIG_SCALING_INPUT_FULL_SCALE;  in adc_nrfx_channel_setup()
78 		LOG_ERR("Selected ADC gain is not valid");  in adc_nrfx_channel_setup()
79 		return -EINVAL;  in adc_nrfx_channel_setup()
82 	switch (channel_cfg->reference) {  in adc_nrfx_channel_setup()
84 		config->reference = NRF_ADC_CONFIG_REF_VBG;  in adc_nrfx_channel_setup()
85 		config->extref    = NRF_ADC_CONFIG_EXTREFSEL_NONE;  in adc_nrfx_channel_setup()
88 		config->reference = NRF_ADC_CONFIG_REF_SUPPLY_ONE_HALF;  in adc_nrfx_channel_setup()
89 		config->extref    = NRF_ADC_CONFIG_EXTREFSEL_NONE;  in adc_nrfx_channel_setup()
92 		config->reference = NRF_ADC_CONFIG_REF_SUPPLY_ONE_THIRD;  in adc_nrfx_channel_setup()
93 		config->extref    = NRF_ADC_CONFIG_EXTREFSEL_NONE;  in adc_nrfx_channel_setup()
96 		config->reference = NRF_ADC_CONFIG_REF_EXT;  in adc_nrfx_channel_setup()
97 		config->extref    = NRF_ADC_CONFIG_EXTREFSEL_AREF0;  in adc_nrfx_channel_setup()
100 		config->reference = NRF_ADC_CONFIG_REF_EXT;  in adc_nrfx_channel_setup()
101 		config->extref    = NRF_ADC_CONFIG_EXTREFSEL_AREF1;  in adc_nrfx_channel_setup()
104 		LOG_ERR("Selected ADC reference is not valid");  in adc_nrfx_channel_setup()
105 		return -EINVAL;  in adc_nrfx_channel_setup()
108 	config->input = channel_cfg->input_positive;  in adc_nrfx_channel_setup()
110 	config->resolution = NRF_ADC_CONFIG_RES_8BIT;  in adc_nrfx_channel_setup()
139 	if (sequence->options) {  in check_buffer_size()
140 		needed_buffer_size *= (1 + sequence->options->extra_samplings);  in check_buffer_size()
143 	if (sequence->buffer_size < needed_buffer_size) {  in check_buffer_size()
145 				sequence->buffer_size, needed_buffer_size);  in check_buffer_size()
146 		return -ENOMEM;  in check_buffer_size()
156 	uint32_t selected_channels = sequence->channels;  in start_read()
161 	/* Signal an error if channel selection is invalid (no channels or  in start_read()
162 	 * a non-existing one is selected).  in start_read()
167 		LOG_ERR("Invalid selection of channels");  in start_read()
168 		return -EINVAL;  in start_read()
171 	if (sequence->oversampling != 0U) {  in start_read()
173 		return -EINVAL;  in start_read()
176 	switch (sequence->resolution) {  in start_read()
187 		LOG_ERR("ADC resolution value %d is not valid",  in start_read()
188 			    sequence->resolution);  in start_read()
189 		return -EINVAL;  in start_read()
195 	/* Enable the channels selected for the pointed sequence.  in start_read()
217 	m_data.buffer = sequence->buffer;  in start_read()
259 	if (p_event->type == NRFX_ADC_EVT_DONE) {  in event_handler()
272 			    dev->name);  in init_adc()
273 		return -EBUSY;  in init_adc()