3  * SPDX-License-Identifier: Apache-2.0
49 	const struct adc_keys_config *cfg = dev->config;  in adc_keys_read()
50 	struct adc_keys_data *data = dev->data;  in adc_keys_read()
55 	data->seq.buffer = &sample_raw;  in adc_keys_read()
56 	data->seq.buffer_size = sizeof(sample_raw);  in adc_keys_read()
58 	ret = adc_read(cfg->channel.dev, &data->seq);  in adc_keys_read()
61 		return cfg->keyup_mv;  in adc_keys_read()
65 	adc_raw_to_millivolts_dt(&cfg->channel, &sample_mv);  in adc_keys_read()
72 	const struct adc_keys_config *cfg = dev->config;  in adc_keys_process()
82 	 * Find the closest key press threshold to the sample value.  in adc_keys_process()
85 	for (uint8_t i = 0; i < cfg->code_cnt; i++) {  in adc_keys_process()
86 		diff = abs(sample_mv - cfg->code_cfg[i].press_mv);  in adc_keys_process()
89 			closest_mv = cfg->code_cfg[i].press_mv;  in adc_keys_process()
93 	diff = abs(sample_mv - cfg->keyup_mv);  in adc_keys_process()
96 		closest_mv = cfg->keyup_mv;  in adc_keys_process()
99 	LOG_DBG("sample=%d mV, closest=%d mV, diff=%d mV", sample_mv, closest_mv, closest_diff);  in adc_keys_process()
102 	 * Update cached key states according to the closest key press threshold.  in adc_keys_process()
104 	 * Note that multiple keys may have the same press threshold, which is  in adc_keys_process()
108 	for (uint8_t i = 0; i < cfg->code_cnt; i++) {  in adc_keys_process()
109 		code_cfg = &cfg->code_cfg[i];  in adc_keys_process()
110 		key_state = &cfg->key_state[code_cfg->key_index];  in adc_keys_process()
114 		 * being overwritten by another threshold configuration.  in adc_keys_process()
116 		if (closest_mv == code_cfg->press_mv) {  in adc_keys_process()
117 			key_state->curr_state = true;  in adc_keys_process()
125 	for (uint8_t i = 0; i < cfg->key_cnt; i++) {  in adc_keys_process()
126 		key_state = &cfg->key_state[i];  in adc_keys_process()
127 		key_code = cfg->key_code[i];  in adc_keys_process()
129 		if (key_state->last_state != key_state->curr_state) {  in adc_keys_process()
130 			LOG_DBG("Report event %s %d, code=%d", dev->name, key_state->curr_state,  in adc_keys_process()
132 			input_report_key(dev, key_code, key_state->curr_state, true, K_FOREVER);  in adc_keys_process()
133 			key_state->last_state = key_state->curr_state;  in adc_keys_process()
140 		key_state->curr_state = false;  in adc_keys_process()
148 	const struct device *dev = data->self;  in adc_keys_work_handler()
149 	const struct adc_keys_config *cfg = dev->config;  in adc_keys_work_handler()
153 	k_work_schedule(&data->dwork, K_MSEC(cfg->sample_period_ms));  in adc_keys_work_handler()
158 	const struct adc_keys_config *cfg = dev->config;  in adc_keys_init()
159 	struct adc_keys_data *data = dev->data;  in adc_keys_init()
162 	if (!adc_is_ready_dt(&cfg->channel)) {  in adc_keys_init()
163 		LOG_ERR("ADC controller device %s not ready", cfg->channel.dev->name);  in adc_keys_init()
164 		return -ENODEV;  in adc_keys_init()
167 	ret = adc_channel_setup_dt(&cfg->channel);  in adc_keys_init()
173 	ret = adc_sequence_init_dt(&cfg->channel, &data->seq);  in adc_keys_init()
179 	data->self = dev;  in adc_keys_init()
180 	k_work_init_delayable(&data->dwork, adc_keys_work_handler);  in adc_keys_init()
183 		for (uint8_t i = 0; i < cfg->code_cnt; i++) {  in adc_keys_init()
184 			LOG_DBG("* code %d: key_index=%d threshold=%d mV code=%d", i,  in adc_keys_init()
185 				cfg->code_cfg[i].key_index, cfg->code_cfg[i].press_mv,  in adc_keys_init()
186 				cfg->key_code[cfg->code_cfg[i].key_index]);  in adc_keys_init()
190 	k_work_schedule(&data->dwork, K_MSEC(cfg->sample_period_ms));  in adc_keys_init()