blob: 653df85dd566a1f2d463ef36b1d6e7de2194224d [file] [log] [blame]
/*
* Copyright (c) 2023 Grinn
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT adi_ad5592_dac
#include <zephyr/drivers/dac.h>
#include <zephyr/kernel.h>
#include <zephyr/sys/byteorder.h>
#include <zephyr/drivers/mfd/ad5592.h>
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(dac_ad5592, CONFIG_DAC_LOG_LEVEL);
#define AD5592_DAC_RESOLUTION 12
#define AD5592_DAC_WR_MSB_BIT BIT(15)
#define AD5592_DAC_CHANNEL_SHIFT_VAL 12
struct dac_ad5592_config {
const struct device *mfd_dev;
};
struct dac_ad5592_data {
uint8_t dac_conf;
};
static int dac_ad5592_channel_setup(const struct device *dev,
const struct dac_channel_cfg *channel_cfg)
{
const struct dac_ad5592_config *config = dev->config;
struct dac_ad5592_data *data = dev->data;
if (channel_cfg->channel_id >= AD5592_PIN_MAX) {
LOG_ERR("Invalid channel number %d", channel_cfg->channel_id);
return -EINVAL;
}
if (channel_cfg->resolution != AD5592_DAC_RESOLUTION) {
LOG_ERR("Invalid resolution %d", channel_cfg->resolution);
return -EINVAL;
}
data->dac_conf |= BIT(channel_cfg->channel_id);
return mfd_ad5592_write_reg(config->mfd_dev, AD5592_REG_LDAC_EN, data->dac_conf);
}
static int dac_ad5592_write_value(const struct device *dev, uint8_t channel,
uint32_t value)
{
const struct dac_ad5592_config *config = dev->config;
uint16_t msg;
if (channel >= AD5592_PIN_MAX) {
LOG_ERR("Invalid channel number %d", channel);
return -EINVAL;
}
if (value >= (1 << AD5592_DAC_RESOLUTION)) {
LOG_ERR("Value %d out of range", value);
return -EINVAL;
}
msg = sys_cpu_to_be16(AD5592_DAC_WR_MSB_BIT |
channel << AD5592_DAC_CHANNEL_SHIFT_VAL |
value);
return mfd_ad5592_write_raw(config->mfd_dev, msg);
}
static const struct dac_driver_api dac_ad5592_api = {
.channel_setup = dac_ad5592_channel_setup,
.write_value = dac_ad5592_write_value,
};
static int dac_ad5592_init(const struct device *dev)
{
const struct dac_ad5592_config *config = dev->config;
int ret;
if (!device_is_ready(config->mfd_dev)) {
return -ENODEV;
}
ret = mfd_ad5592_write_reg(config->mfd_dev, AD5592_REG_PD_REF_CTRL, AD5592_EN_REF);
if (ret < 0) {
return ret;
}
return 0;
}
#define DAC_AD5592_DEFINE(inst) \
static const struct dac_ad5592_config dac_ad5592_config##inst = { \
.mfd_dev = DEVICE_DT_GET(DT_INST_PARENT(inst)), \
}; \
\
struct dac_ad5592_data dac_ad5592_data##inst; \
\
DEVICE_DT_INST_DEFINE(inst, dac_ad5592_init, NULL, \
&dac_ad5592_data##inst, &dac_ad5592_config##inst, \
POST_KERNEL, CONFIG_MFD_INIT_PRIORITY, \
&dac_ad5592_api);
DT_INST_FOREACH_STATUS_OKAY(DAC_AD5592_DEFINE)