5  * SPDX-License-Identifier: Apache-2.0
43 	uint32_t channels;  member
54 	struct ifx_cat1_adc_data *data = dev->data;  in _cyhal_adc_event_callback()
55 	uint32_t channels = data->channels;  in _cyhal_adc_event_callback()  local
59 	while (channels != 0) {  in _cyhal_adc_event_callback()
60 		channel_id = find_lsb_set(channels) - 1;  in _cyhal_adc_event_callback()
61 		channels &= ~BIT(channel_id);  in _cyhal_adc_event_callback()
63 		result = Cy_SAR_GetResult32(data->adc_chan_obj[channel_id].adc->base,  in _cyhal_adc_event_callback()
64 					    data->adc_chan_obj[channel_id].channel_idx);  in _cyhal_adc_event_callback()
66 		 * convert the lowest signed 12-bit number to 0x0.  in _cyhal_adc_event_callback()
68 		*data->buffer = (uint16_t)(result + 0x800);  in _cyhal_adc_event_callback()
69 		data->buffer++;  in _cyhal_adc_event_callback()
72 	adc_context_on_sampling_done(&data->ctx, dev);  in _cyhal_adc_event_callback()
74 	LOG_DBG("%s ISR triggered.", dev->name);  in _cyhal_adc_event_callback()
81 	data->repeat_buffer = data->buffer;  in adc_context_start_sampling()
83 	Cy_SAR_StartConvert(data->adc_obj.base, CY_SAR_START_CONVERT_SINGLE_SHOT);  in adc_context_start_sampling()
92 		data->buffer = data->repeat_buffer;  in adc_context_update_buffer_pointer()
99 	struct ifx_cat1_adc_data *data = dev->data;  in ifx_cat1_adc_channel_setup()
102 	cyhal_gpio_t vplus = CYHAL_GET_GPIO(_ADCSAR_PORT, channel_cfg->input_positive);  in ifx_cat1_adc_channel_setup()
103 	cyhal_gpio_t vminus = channel_cfg->differential ?  in ifx_cat1_adc_channel_setup()
104 			      CYHAL_GET_GPIO(_ADCSAR_PORT, channel_cfg->input_negative) :  in ifx_cat1_adc_channel_setup()
108 	if (channel_cfg->reference != ADC_REF_INTERNAL) {  in ifx_cat1_adc_channel_setup()
109 		LOG_ERR("Selected ADC reference is not valid");  in ifx_cat1_adc_channel_setup()
110 		return -EINVAL;  in ifx_cat1_adc_channel_setup()
113 	if (channel_cfg->gain != ADC_GAIN_1) {  in ifx_cat1_adc_channel_setup()
114 		LOG_ERR("Selected ADC gain is not valid");  in ifx_cat1_adc_channel_setup()
115 		return -EINVAL;  in ifx_cat1_adc_channel_setup()
118 	if (channel_cfg->acquisition_time != ADC_ACQ_TIME_DEFAULT) {  in ifx_cat1_adc_channel_setup()
119 		switch (ADC_ACQ_TIME_UNIT(channel_cfg->acquisition_time)) {  in ifx_cat1_adc_channel_setup()
121 			acquisition_ns = ADC_ACQ_TIME_VALUE(channel_cfg->acquisition_time) * 1000;  in ifx_cat1_adc_channel_setup()
124 			acquisition_ns = ADC_ACQ_TIME_VALUE(channel_cfg->acquisition_time);  in ifx_cat1_adc_channel_setup()
127 			LOG_ERR("Selected ADC acquisition time units is not valid");  in ifx_cat1_adc_channel_setup()
128 			return -EINVAL;  in ifx_cat1_adc_channel_setup()
143 	cyhal_adc_channel_free(&data->adc_chan_obj[channel_cfg->channel_id]);  in ifx_cat1_adc_channel_setup()
144 	result = cyhal_adc_channel_init_diff(&data->adc_chan_obj[channel_cfg->channel_id],  in ifx_cat1_adc_channel_setup()
145 					     &data->adc_obj, vplus, vminus, &channel_config);  in ifx_cat1_adc_channel_setup()
148 		return -EIO;  in ifx_cat1_adc_channel_setup()
151 	data->channels_mask |= BIT(channel_cfg->channel_id);  in ifx_cat1_adc_channel_setup()
162 		if (sequence->channels & BIT(i)) {  in validate_buffer_size()
169 	if (sequence->options) {  in validate_buffer_size()
170 		total_buffer_size *= (1 + sequence->options->extra_samplings);  in validate_buffer_size()
173 	if (sequence->buffer_size < total_buffer_size) {  in validate_buffer_size()
174 		return -ENOMEM;  in validate_buffer_size()
183 	struct ifx_cat1_adc_data *data = dev->data;  in start_read()
184 	uint32_t channels = sequence->channels;  in start_read()  local
185 	uint32_t unconfigured_channels = channels & ~data->channels_mask;  in start_read()
187 	if (sequence->resolution != ADC_CAT1_RESOLUTION) {  in start_read()
188 		LOG_ERR("Invalid ADC resolution (%d)", sequence->resolution);  in start_read()
189 		return -EINVAL;  in start_read()
194 		return -EINVAL;  in start_read()
197 	if (sequence->oversampling) {  in start_read()
199 		return -ENOTSUP;  in start_read()
209 	data->channels = channels;  in start_read()
210 	data->buffer = sequence->buffer;  in start_read()
211 	adc_context_start_read(&data->ctx, sequence);  in start_read()
213 	return adc_context_wait_for_completion(&data->ctx);  in start_read()
220 	struct ifx_cat1_adc_data *data = dev->data;  in ifx_cat1_adc_read()
222 	adc_context_lock(&data->ctx, false, NULL);  in ifx_cat1_adc_read()
224 	adc_context_release(&data->ctx, ret);  in ifx_cat1_adc_read()
234 	struct ifx_cat1_adc_data *data = dev->data;  in ifx_cat1_adc_read_async()
236 	adc_context_lock(&data->ctx, true, async);  in ifx_cat1_adc_read_async()
238 	adc_context_release(&data->ctx, ret);  in ifx_cat1_adc_read_async()
246 	struct ifx_cat1_adc_data *data = dev->data;  in ifx_cat1_adc_init()
247 	const struct ifx_cat1_adc_config *config = dev->config;  in ifx_cat1_adc_init()
250 	data->dev = dev;  in ifx_cat1_adc_init()
253 	result = cyhal_adc_init(&data->adc_obj, CYHAL_GET_GPIO(_ADCSAR_PORT, 0), NULL);  in ifx_cat1_adc_init()
256 		return -EIO;  in ifx_cat1_adc_init()
260 	cyhal_adc_enable_event(&data->adc_obj, (cyhal_adc_event_t)ADC_CAT1_EVENTS_MASK,  in ifx_cat1_adc_init()
261 			       config->irq_priority, true);  in ifx_cat1_adc_init()
262 	cyhal_adc_register_callback(&data->adc_obj, _cyhal_adc_event_callback, (void *) dev);  in ifx_cat1_adc_init()
264 	adc_context_unlock_unconditionally(&data->ctx);  in ifx_cat1_adc_init()