4  * SPDX-License-Identifier: Apache-2.0
13 #include <zephyr/dt-bindings/adc/smartbond-adc.h>
50  * settings for each channel that must be applied before conversion.
61 	uint8_t channel_id = channel_cfg->channel_id;  in adc_smartbond_channel_setup()
65 		return -EINVAL;  in adc_smartbond_channel_setup()
68 	if (channel_cfg->acquisition_time != ADC_ACQ_TIME_DEFAULT) {  in adc_smartbond_channel_setup()
70 		return -EINVAL;  in adc_smartbond_channel_setup()
73 	if (channel_cfg->differential) {  in adc_smartbond_channel_setup()
74 		if (channel_cfg->input_positive != SMARTBOND_GPADC_P1_09 &&  in adc_smartbond_channel_setup()
75 		    channel_cfg->input_positive != SMARTBOND_GPADC_P0_08) {  in adc_smartbond_channel_setup()
77 			return -EINVAL;  in adc_smartbond_channel_setup()
81 	switch (channel_cfg->gain) {  in adc_smartbond_channel_setup()
84 		config->gp_adc_ctrl2_reg = 0x101;  in adc_smartbond_channel_setup()
87 		config->gp_adc_ctrl2_reg = 0;  in adc_smartbond_channel_setup()
91 		return -EINVAL;  in adc_smartbond_channel_setup()
94 	switch (channel_cfg->reference) {  in adc_smartbond_channel_setup()
99 		return -EINVAL;  in adc_smartbond_channel_setup()
102 	config->gp_adc_ctrl_reg =  in adc_smartbond_channel_setup()
103 		channel_cfg->input_positive << GPADC_GP_ADC_CTRL_REG_GP_ADC_SEL_Pos;  in adc_smartbond_channel_setup()
104 	if (!channel_cfg->differential) {  in adc_smartbond_channel_setup()
105 		config->gp_adc_ctrl_reg |= GPADC_GP_ADC_CTRL_REG_GP_ADC_SE_Msk;  in adc_smartbond_channel_setup()
149 	int current_channel = u32_count_trailing_zeros(data->channel_read_mask);  in adc_context_start_sampling()
151 	if (ctx->sequence.calibrate) {  in adc_context_start_sampling()
154 		val = GPADC->GP_ADC_CTRL_REG & ~PER_CHANNEL_ADC_CONFIG_MASK;  in adc_context_start_sampling()
159 		GPADC->GP_ADC_CTRL2_REG = m_channels[current_channel].gp_adc_ctrl2_reg;  in adc_context_start_sampling()
160 		GPADC->GP_ADC_CTRL_REG = val;  in adc_context_start_sampling()
171 		data->buffer += data->sequence_channel_count;  in adc_context_update_buffer_pointer()
181 	if (sequence->options) {  in check_buffer_size()
182 		needed_buffer_size *= (1 + sequence->options->extra_samplings);  in check_buffer_size()
185 	if (sequence->buffer_size < needed_buffer_size) {  in check_buffer_size()
187 			sequence->buffer_size, needed_buffer_size);  in check_buffer_size()
188 		return -ENOMEM;  in check_buffer_size()
198 	struct adc_smartbond_data *data = dev->data;  in start_read()
200 	if (sequence->oversampling > 7U) {  in start_read()
202 		return -EINVAL;  in start_read()
205 	if ((sequence->channels == 0) ||  in start_read()
206 	    ((sequence->channels & ~BIT_MASK(SMARTBOND_ADC_CHANNEL_COUNT)) != 0)) {  in start_read()
208 		return -EINVAL;  in start_read()
211 	if (sequence->resolution < 8 || sequence->resolution > 15) {  in start_read()
213 			sequence->resolution);  in start_read()
214 		return -EINVAL;  in start_read()
222 	data->buffer = sequence->buffer;  in start_read()
223 	data->channel_read_mask = sequence->channels;  in start_read()
224 	data->sequence_channel_count = pop_count(sequence->channels);  in start_read()
225 	data->result_index = 0;  in start_read()
227 	adc_context_start_read(&data->ctx, sequence);  in start_read()
229 	error = adc_context_wait_for_completion(&data->ctx);  in start_read()
235 	struct adc_smartbond_data *data = dev->data;  in adc_smartbond_isr()
236 	int current_channel = u32_count_trailing_zeros(data->channel_read_mask);  in adc_smartbond_isr()
238 	GPADC->GP_ADC_CLEAR_INT_REG = 0;  in adc_smartbond_isr()
240 	data->buffer[data->result_index++] = ((uint16_t)GPADC->GP_ADC_RESULT_REG) >>  in adc_smartbond_isr()
241 		(16 - data->ctx.sequence.resolution);  in adc_smartbond_isr()
243 	data->channel_read_mask ^= 1 << current_channel;  in adc_smartbond_isr()
245 	if (data->channel_read_mask == 0) {  in adc_smartbond_isr()
247 		adc_context_on_sampling_done(&data->ctx, dev);  in adc_smartbond_isr()
249 		adc_context_start_sampling(&data->ctx);  in adc_smartbond_isr()
252 	LOG_DBG("%s ISR triggered.", dev->name);  in adc_smartbond_isr()
260 	struct adc_smartbond_data *data = dev->data;  in adc_smartbond_read()
262 	adc_context_lock(&data->ctx, false, NULL);  in adc_smartbond_read()
265 	adc_context_release(&data->ctx, error);  in adc_smartbond_read()
276 	struct adc_smartbond_data *data = dev->data;  in adc_smartbond_read_async()
279 	adc_context_lock(&data->ctx, true, async);  in adc_smartbond_read_async()
282 	adc_context_release(&data->ctx, error);  in adc_smartbond_read_async()
290 	int ret, rate;  in gpadc_smartbond_resume()  local
291 	const struct adc_smartbond_cfg *config = dev->config;  in gpadc_smartbond_resume()
297 	clock_control_get_rate(clock_dev, (clock_control_subsys_t)SMARTBOND_CLK_SYS_CLK, &rate);  in gpadc_smartbond_resume()
298 	GPADC->GP_ADC_CTRL3_REG = (rate/1600000)&0xff;  in gpadc_smartbond_resume()
300 	GPADC->GP_ADC_CTRL_REG = GPADC_GP_ADC_CTRL_REG_GP_ADC_EN_Msk;  in gpadc_smartbond_resume()
306 	ret = pinctrl_apply_state(config->pcfg, PINCTRL_STATE_DEFAULT);  in gpadc_smartbond_resume()
307 	if (ret < 0 && ret != -ENOENT) {  in gpadc_smartbond_resume()
309 		GPADC->GP_ADC_CTRL_REG = 0;  in gpadc_smartbond_resume()
325 	const struct adc_smartbond_cfg *config = dev->config;  in gpadc_smartbond_suspend()
328 	GPADC->GP_ADC_CTRL_REG = 0;  in gpadc_smartbond_suspend()
337 	ret = pinctrl_apply_state(config->pcfg, PINCTRL_STATE_SLEEP);  in gpadc_smartbond_suspend()
338 	if (ret < 0 && ret != -ENOENT) {  in gpadc_smartbond_suspend()
359 		return -ENOTSUP;  in gpadc_smartbond_pm_action()
368 	struct adc_smartbond_data *data = dev->data;  in adc_smartbond_init()
387 	adc_context_unlock_unconditionally(&data->ctx);  in adc_smartbond_init()