4  * SPDX-License-Identifier: Apache-2.0
18 #include <zephyr/drivers/dac.h>
40 /* Specifies the source of the reference voltage. */
42 	REF_INTERNAL, /* Internal 2.5V voltage reference. */
43 	REF_EXTERNAL, /* External pin voltage reference. */
46 /* Specifies the reference voltage multiplier. */
60 	/* Number of bits in the DAC register: Either 12, 14 or 16. */
66 	const struct dacx0501_config *config = dev->config;  in dacx0501_reg_read()
70 	status = i2c_write_read_dt(&config->i2c_spec, &addr, sizeof(addr), raw_data,  in dacx0501_reg_read()
76 	/* DAC is big endian. */  in dacx0501_reg_read()
83 	const struct dacx0501_config *config = dev->config;  in dacx0501_reg_write()
86 	/* DAC is big endian. */  in dacx0501_reg_write()
89 	return i2c_write_dt(&config->i2c_spec, write_cmd, sizeof(write_cmd));  in dacx0501_reg_write()
95 	struct dacx0501_data *data = dev->data;  in dacx0501_channel_setup()
98 	if (channel_cfg->channel_id != 0) {  in dacx0501_channel_setup()
99 		LOG_ERR("Unsupported channel %d", channel_cfg->channel_id);  in dacx0501_channel_setup()
100 		return -ENOTSUP;  in dacx0501_channel_setup()
103 	if (channel_cfg->resolution != data->resolution) {  in dacx0501_channel_setup()
104 		LOG_ERR("Unsupported resolution %d. Actual: %d", channel_cfg->resolution,  in dacx0501_channel_setup()
105 			data->resolution);  in dacx0501_channel_setup()
106 		return -ENOTSUP;  in dacx0501_channel_setup()
109 	if (channel_cfg->internal) {  in dacx0501_channel_setup()
111 		return -ENOTSUP;  in dacx0501_channel_setup()
119 	struct dacx0501_data *data = dev->data;  in dacx0501_write_value()
123 		return -ENOTSUP;  in dacx0501_write_value()
126 	if (value >= (1 << data->resolution)) {  in dacx0501_write_value()
128 		return -EINVAL;  in dacx0501_write_value()
131 	value <<= (16 - data->resolution);  in dacx0501_write_value()
138 	const struct dacx0501_config *config = dev->config;  in dacx0501_init()
139 	struct dacx0501_data *data = dev->data;  in dacx0501_init()
143 	if (!i2c_is_ready_dt(&config->i2c_spec)) {  in dacx0501_init()
144 		LOG_ERR("I2C bus %s not ready", config->i2c_spec.bus->name);  in dacx0501_init()
145 		return -ENODEV;  in dacx0501_init()
155 	data->resolution = 16 - 2 * FIELD_GET(DACX0501_MASK_DEVICE_ID_RES, device_id);  in dacx0501_init()
159 					       config->voltage_reference == REF_EXTERNAL));  in dacx0501_init()
167 		FIELD_PREP(DACX0501_MASK_GAIN_REFDIV_EN, config->output_gain == VM_DIV2) |  in dacx0501_init()
168 			FIELD_PREP(DACX0501_MASK_GAIN_BUFF_GAIN, config->output_gain == VM_MUL2));  in dacx0501_init()
177 static DEVICE_API(dac, dacx0501_driver_api) = {