4  * SPDX-License-Identifier: Apache-2.0
44 		if (chan_mask & sequence->channels) {  in adc_kb1200_validate_buffer_size()
51 	if (sequence->options) {  in adc_kb1200_validate_buffer_size()
52 		buff_need *= 1 + sequence->options->extra_samplings;  in adc_kb1200_validate_buffer_size()
55 	if (buff_need > sequence->buffer_size) {  in adc_kb1200_validate_buffer_size()
62  *  1. Start ADC sampling (set up flag ctx->sync)
63  *     adc_context_start_read() -> adc_context_start_sampling()
64  *  2. Wait ADC sample finish (by monitor flag ctx->sync)
66  *  3. Finish ADC sample (isr clear flag ctx->sync)
67  *     adc_context_on_sampling_done -> adc_context_complete
71 	const struct adc_kb1200_config *config = dev->config;  in adc_kb1200_start_read()
72 	struct adc_kb1200_data *data = dev->data;  in adc_kb1200_start_read()
75 	if (!sequence->channels || (sequence->channels & ~BIT_MASK(ADC_MAX_CHAN))) {  in adc_kb1200_start_read()
76 		LOG_ERR("Invalid ADC channels.");  in adc_kb1200_start_read()
77 		return -EINVAL;  in adc_kb1200_start_read()
80 	if (sequence->resolution != ADC_RESOLUTION) {  in adc_kb1200_start_read()
82 		return -ENOTSUP;  in adc_kb1200_start_read()
84 	/* Check sequence->buffer_size is enough */  in adc_kb1200_start_read()
87 		return -ENOMEM;  in adc_kb1200_start_read()
91 	data->buffer = sequence->buffer;  in adc_kb1200_start_read()
92 	data->buf_end = data->buffer + sequence->buffer_size / sizeof(uint16_t);  in adc_kb1200_start_read()
94 	data->adc_dev = dev;  in adc_kb1200_start_read()
96 	adc_context_start_read(&data->ctx, sequence);  in adc_kb1200_start_read()
98 	 * flag to be valid, then record adc value.  in adc_kb1200_start_read()
100 	uint32_t channels = (config->adc->ADCCFG & ADC_CHANNEL_BIT_MASK) >> ADC_CHANNEL_BIT_POS;  in adc_kb1200_start_read()  local
102 	while (channels) {  in adc_kb1200_start_read()
107 		ch_num = find_lsb_set(channels) - 1;  in adc_kb1200_start_read()
108 		/* wait valid flag */  in adc_kb1200_start_read()
109 		while (config->adc->ADCDAT[ch_num] & ADC_INVALID_VALUE) {  in adc_kb1200_start_read()
114 				error = -EBUSY;  in adc_kb1200_start_read()
119 		if (data->buffer < data->buf_end) {  in adc_kb1200_start_read()
120 			*data->buffer = (uint16_t)(config->adc->ADCDAT[ch_num]);  in adc_kb1200_start_read()
121 			data->buffer++;  in adc_kb1200_start_read()
123 			error = -EINVAL;  in adc_kb1200_start_read()
128 		channels &= ~BIT(ch_num);  in adc_kb1200_start_read()
133 	adc_context_on_sampling_done(&data->ctx, dev);  in adc_kb1200_start_read()
141 	if (channel_cfg->channel_id >= ADC_MAX_CHAN) {  in adc_kb1200_channel_setup()
142 		LOG_ERR("Invalid channel %d.", channel_cfg->channel_id);  in adc_kb1200_channel_setup()
143 		return -EINVAL;  in adc_kb1200_channel_setup()
146 	if (channel_cfg->acquisition_time != ADC_ACQ_TIME_DEFAULT) {  in adc_kb1200_channel_setup()
148 		return -ENOTSUP;  in adc_kb1200_channel_setup()
151 	if (channel_cfg->differential) {  in adc_kb1200_channel_setup()
152 		LOG_ERR("Differential channels are not supported.");  in adc_kb1200_channel_setup()
153 		return -ENOTSUP;  in adc_kb1200_channel_setup()
156 	if (channel_cfg->gain != ADC_GAIN_1) {  in adc_kb1200_channel_setup()
157 		LOG_ERR("Unsupported channel gain %d.", channel_cfg->gain);  in adc_kb1200_channel_setup()
158 		return -ENOTSUP;  in adc_kb1200_channel_setup()
161 	if (channel_cfg->reference != ADC_REF_INTERNAL) {  in adc_kb1200_channel_setup()
163 		return -ENOTSUP;  in adc_kb1200_channel_setup()
165 	LOG_DBG("ADC channel %d configured.", channel_cfg->channel_id);  in adc_kb1200_channel_setup()
171 	struct adc_kb1200_data *data = dev->data;  in adc_kb1200_read()
174 	adc_context_lock(&data->ctx, false, NULL);  in adc_kb1200_read()
176 	adc_context_release(&data->ctx, error);  in adc_kb1200_read()
185 	struct adc_kb1200_data *data = dev->data;  in adc_kb1200_read_async()
188 	adc_context_lock(&data->ctx, true, async);  in adc_kb1200_read_async()
190 	adc_context_release(&data->ctx, error);  in adc_kb1200_read_async()
200 	const struct device *dev = data->adc_dev;  in adc_context_start_sampling()
201 	const struct adc_kb1200_config *config = dev->config;  in adc_context_start_sampling()
203 	data->repeat_buffer = data->buffer;  in adc_context_start_sampling()
204 	config->adc->ADCCFG = (config->adc->ADCCFG & ~ADC_CHANNEL_BIT_MASK) |  in adc_context_start_sampling()
205 			      (ctx->sequence.channels << ADC_CHANNEL_BIT_POS);  in adc_context_start_sampling()
206 	config->adc->ADCCFG |= ADC_FUNCTION_ENABLE;  in adc_context_start_sampling()
214 		data->buffer = data->repeat_buffer;  in adc_context_update_buffer_pointer()
229 	const struct adc_kb1200_config *config = dev->config;  in adc_kb1200_init()
230 	struct adc_kb1200_data *data = dev->data;  in adc_kb1200_init()
233 	adc_context_unlock_unconditionally(&data->ctx);  in adc_kb1200_init()
234 	/* Configure pin-mux for ADC device */  in adc_kb1200_init()
235 	ret = pinctrl_apply_state(config->pcfg, PINCTRL_STATE_DEFAULT);  in adc_kb1200_init()