4  * SPDX-License-Identifier: Apache-2.0
24  * @brief Reads and returns VBUS measured in mV
27  * @retval -EIO on failure
31 	const struct usbc_vbus_config *const config = dev->config;  in adc_vbus_measure()
32 	struct usbc_vbus_data *data = dev->data;  in adc_vbus_measure()
36 	__ASSERT(meas != NULL, "ADC VBUS meas must not be NULL");  in adc_vbus_measure()
38 	ret = adc_read(config->adc_channel.dev, &data->sequence);  in adc_vbus_measure()
44 	value = data->sample;  in adc_vbus_measure()
45 	ret = adc_raw_to_millivolts_dt(&config->adc_channel, &value);  in adc_vbus_measure()
51 	if (config->full_ohm > 0) {  in adc_vbus_measure()
52 		/* VBUS is scaled down though a voltage divider */  in adc_vbus_measure()
53 		value = (value * 1000) / ((config->output_ohm * 1000) / config->full_ohm);  in adc_vbus_measure()
61  * @brief Checks if VBUS is at a particular level
63  * @retval true if VBUS is at the level voltage, else false
89  * @brief Sets pin to discharge VBUS
92  * @retval -EIO on failure
93  * @retval -ENOENT if enable pin isn't defined
98 	const struct usbc_vbus_config *const config = dev->config;  in adc_vbus_discharge()
99 	const struct gpio_dt_spec *gcd = &config->discharge_gpios;  in adc_vbus_discharge()
100 	int ret = -ENOENT;  in adc_vbus_discharge()
102 	if (gcd->port) {  in adc_vbus_discharge()
109  * @brief Sets pin to enable VBUS measurments
112  * @retval -EIO on failure
113  * @retval -ENOENT if enable pin isn't defined
118 	const struct usbc_vbus_config *const config = dev->config;  in adc_vbus_enable()
119 	const struct gpio_dt_spec *gcp = &config->power_gpios;  in adc_vbus_enable()
120 	int ret = -ENOENT;  in adc_vbus_enable()
122 	if (gcp->port) {  in adc_vbus_enable()
129  * @brief Initializes the ADC VBUS Driver
132  * @retval -EIO on failure
136 	const struct usbc_vbus_config *const config = dev->config;  in adc_vbus_init()
137 	struct usbc_vbus_data *data = dev->data;  in adc_vbus_init()
138 	const struct gpio_dt_spec *gcp = &config->power_gpios;  in adc_vbus_init()
139 	const struct gpio_dt_spec *gcd = &config->discharge_gpios;  in adc_vbus_init()
142 	if (!adc_is_ready_dt(&config->adc_channel)) {  in adc_vbus_init()
144 		return -ENODEV;  in adc_vbus_init()
147 	/* Configure VBUS Measurement enable pin if defined */  in adc_vbus_init()
148 	if (gcp->port) {  in adc_vbus_init()
149 		if (!device_is_ready(gcp->port)) {  in adc_vbus_init()
150 			LOG_ERR("%s: device not ready", gcp->port->name);  in adc_vbus_init()
151 			return -EIO;  in adc_vbus_init()
156 				gcp->port->name, gcp->pin, ret);  in adc_vbus_init()
161 	/* Configure VBUS Discharge pin if defined */  in adc_vbus_init()
162 	if (gcd->port) {  in adc_vbus_init()
163 		if (!device_is_ready(gcd->port)) {  in adc_vbus_init()
164 			LOG_ERR("%s: device not ready", gcd->port->name);  in adc_vbus_init()
165 			return -EIO;  in adc_vbus_init()
170 				gcd->port->name, gcd->pin, ret);  in adc_vbus_init()
176 	data->sequence.buffer = &data->sample;  in adc_vbus_init()
177 	data->sequence.buffer_size = sizeof(data->sample);  in adc_vbus_init()
179 	ret = adc_channel_setup_dt(&config->adc_channel);  in adc_vbus_init()
185 	ret = adc_sequence_init_dt(&config->adc_channel, &data->sequence);  in adc_vbus_init()
197 	.discharge = adc_vbus_discharge,
202 	     "No compatible USB-C VBUS Measurement instance found");