5  * SPDX-License-Identifier: Apache-2.0
27 #define ADC_RPI_CHANNEL_NUM (ADC_CS_RROBIN_MSB - ADC_CS_RROBIN_LSB + 1)
69 	hw_set_bits(&adc_hw->cs, ADC_CS_START_ONCE_BITS);  in adc_start_once()
74 	return (uint16_t)adc_hw->result;  in adc_get_result()
79 	return (adc_hw->cs & ADC_CS_ERR_BITS) ? true : false;  in adc_get_err()
85 	hw_set_bits(&adc_hw->fcs, ADC_FCS_OVER_BITS);  in adc_clear_errors()
86 	hw_set_bits(&adc_hw->fcs, ADC_FCS_UNDER_BITS);  in adc_clear_errors()
87 	hw_set_bits(&adc_hw->fcs, ADC_FCS_ERR_BITS);  in adc_clear_errors()
88 	hw_set_bits(&adc_hw->cs, ADC_CS_ERR_STICKY_BITS);  in adc_clear_errors()
93 	adc_hw->cs = ADC_CS_EN_BITS;  in adc_enable()
94 	while (!(adc_hw->cs & ADC_CS_READY_BITS)) {  in adc_enable()
102 	const struct adc_rpi_config *config = dev->config;  in adc_rpi_channel_setup()
104 	if (channel_cfg->channel_id >= config->num_channels) {  in adc_rpi_channel_setup()
105 		LOG_ERR("unsupported channel id '%d'", channel_cfg->channel_id);  in adc_rpi_channel_setup()
106 		return -ENOTSUP;  in adc_rpi_channel_setup()
109 	if (channel_cfg->acquisition_time != ADC_ACQ_TIME_DEFAULT) {  in adc_rpi_channel_setup()
111 		return -EINVAL;  in adc_rpi_channel_setup()
114 	if (channel_cfg->differential) {  in adc_rpi_channel_setup()
116 		return -ENOTSUP;  in adc_rpi_channel_setup()
119 	if (channel_cfg->gain != ADC_GAIN_1) {  in adc_rpi_channel_setup()
121 		return -EINVAL;  in adc_rpi_channel_setup()
134  * @return -ENOMEM if buffer is not big enough
139 	const struct adc_rpi_config *config = dev->config;  in adc_rpi_check_buffer_size()
144 	for (mask = BIT(config->num_channels - 1); mask != 0; mask >>= 1) {  in adc_rpi_check_buffer_size()
145 		if (mask & sequence->channels) {  in adc_rpi_check_buffer_size()
151 	if (sequence->options) {  in adc_rpi_check_buffer_size()
152 		needed *= (1 + sequence->options->extra_samplings);  in adc_rpi_check_buffer_size()
155 	if (sequence->buffer_size < needed) {  in adc_rpi_check_buffer_size()
156 		return -ENOMEM;  in adc_rpi_check_buffer_size()
169  * @return -ENOTSUP if requested resolution or channel is out side of supported
171  * @return -ENOMEM if buffer is not big enough
178 	const struct adc_rpi_config *config = dev->config;  in adc_rpi_start_read()
179 	struct adc_rpi_data *data = dev->data;  in adc_rpi_start_read()
182 	if (sequence->resolution > ADC_RPI_MAX_RESOLUTION ||  in adc_rpi_start_read()
183 	    sequence->resolution == 0) {  in adc_rpi_start_read()
184 		LOG_ERR("unsupported resolution %d", sequence->resolution);  in adc_rpi_start_read()
185 		return -ENOTSUP;  in adc_rpi_start_read()
188 	if (find_msb_set(sequence->channels) > config->num_channels) {  in adc_rpi_start_read()
190 			sequence->channels);  in adc_rpi_start_read()
191 		return -ENOTSUP;  in adc_rpi_start_read()
200 	data->buf = sequence->buffer;  in adc_rpi_start_read()
201 	adc_context_start_read(&data->ctx, sequence);  in adc_rpi_start_read()
203 	return adc_context_wait_for_completion(&data->ctx);  in adc_rpi_start_read()
211 	struct adc_rpi_data *data = dev->data;  in adc_rpi_isr()
226 		adc_context_complete(&data->ctx, -EIO);  in adc_rpi_isr()
231 	*data->buf++ = result;  in adc_rpi_isr()
232 	data->channels &= ~(BIT(ainsel));  in adc_rpi_isr()
235 	if (data->channels == 0) {  in adc_rpi_isr()
236 		adc_context_on_sampling_done(&data->ctx, dev);  in adc_rpi_isr()
241 	ainsel = (uint8_t)(find_lsb_set(data->channels) - 1);  in adc_rpi_isr()
250 	struct adc_rpi_data *data = dev->data;  in adc_rpi_read_async()
253 	adc_context_lock(&data->ctx, async ? true : false, async);  in adc_rpi_read_async()
255 	adc_context_release(&data->ctx, err);  in adc_rpi_read_async()
271 	data->channels = ctx->sequence.channels;  in adc_context_start_sampling()
272 	data->repeat_buf = data->buf;  in adc_context_start_sampling()
277 	adc_select_input(find_lsb_set(data->channels) - 1);  in adc_context_start_sampling()
288 		data->buf = data->repeat_buf;  in adc_context_update_buffer_pointer()
294  *        channels to return constant 0 mV and create acquisition thread.
302 	const struct adc_rpi_config *config = dev->config;  in adc_rpi_init()
303 	struct adc_rpi_data *data = dev->data;  in adc_rpi_init()
306 	ret = pinctrl_apply_state(config->pcfg, PINCTRL_STATE_DEFAULT);  in adc_rpi_init()
311 	ret = clock_control_on(config->clk_dev, config->clk_id);  in adc_rpi_init()
316 	ret = reset_line_toggle_dt(&config->reset);  in adc_rpi_init()
321 	config->irq_configure();  in adc_rpi_init()
325 	 * Set the threshold as 1 for getting notification immediately  in adc_rpi_init()
339 	adc_context_unlock_unconditionally(&data->ctx);  in adc_rpi_init()