blob: ba4835b1c704680d1b3c13c23409f45b5d634ca5 [file] [log] [blame]
/*
* Copyright 2023 NXP
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT nxp_gau_dac
#include <zephyr/drivers/dac.h>
#include <fsl_dac.h>
#define LOG_LEVEL CONFIG_DAC_LOG_LEVEL
#include <zephyr/logging/log.h>
#include <zephyr/irq.h>
LOG_MODULE_REGISTER(nxp_gau_dac);
struct nxp_gau_dac_config {
DAC_Type *base;
dac_conversion_rate_t conversion_rate : 2;
dac_reference_voltage_source_t voltage_ref : 1;
dac_output_voltage_range_t output_range : 2;
};
static inline dac_channel_id_t convert_channel_id(uint8_t channel_id)
{
switch (channel_id) {
case 0: return kDAC_ChannelA;
case 1: return kDAC_ChannelB;
default:
LOG_ERR("Invalid DAC channel ID");
return -EINVAL;
};
}
static int nxp_gau_dac_channel_setup(const struct device *dev,
const struct dac_channel_cfg *channel_cfg)
{
const struct nxp_gau_dac_config *config = dev->config;
dac_channel_config_t dac_channel_config = {0};
if (channel_cfg->resolution != 10) {
LOG_ERR("DAC only support 10 bit resolution");
return -EINVAL;
}
if (channel_cfg->buffered) {
/* External and internal output are mutually exclusive */
LOG_WRN("Note: buffering DAC output to pad disconnects internal output");
}
dac_channel_config.waveType = kDAC_WaveNormal;
dac_channel_config.outMode = channel_cfg->buffered ?
kDAC_ChannelOutputPAD : kDAC_ChannelOutputInternal;
dac_channel_config.timingMode = kDAC_NonTimingCorrelated;
dac_channel_config.enableTrigger = false;
dac_channel_config.enableDMA = false;
dac_channel_config.enableConversion = true;
DAC_SetChannelConfig(config->base,
(uint32_t)convert_channel_id(channel_cfg->channel_id),
&dac_channel_config);
return 0;
};
static int nxp_gau_dac_write_value(const struct device *dev,
uint8_t channel, uint32_t value)
{
const struct nxp_gau_dac_config *config = dev->config;
DAC_SetChannelData(config->base,
(uint32_t)convert_channel_id(channel),
(uint16_t)value);
return 0;
};
static const struct dac_driver_api nxp_gau_dac_driver_api = {
.channel_setup = nxp_gau_dac_channel_setup,
.write_value = nxp_gau_dac_write_value,
};
static int nxp_gau_dac_init(const struct device *dev)
{
const struct nxp_gau_dac_config *config = dev->config;
dac_config_t dac_cfg;
DAC_GetDefaultConfig(&dac_cfg);
dac_cfg.conversionRate = config->conversion_rate;
dac_cfg.refSource = config->voltage_ref;
dac_cfg.rangeSelect = config->output_range;
DAC_Init(config->base, &dac_cfg);
return 0;
};
#define NXP_GAU_DAC_INIT(inst) \
\
const struct nxp_gau_dac_config nxp_gau_dac_##inst##_config = { \
.base = (DAC_Type *) DT_INST_REG_ADDR(inst), \
.voltage_ref = DT_INST_ENUM_IDX(inst, nxp_dac_reference), \
.conversion_rate = DT_INST_ENUM_IDX(inst, nxp_conversion_rate), \
.output_range = DT_INST_ENUM_IDX(inst, \
nxp_output_voltage_range), \
}; \
\
\
DEVICE_DT_INST_DEFINE(inst, &nxp_gau_dac_init, NULL, \
NULL, \
&nxp_gau_dac_##inst##_config, \
POST_KERNEL, CONFIG_DAC_INIT_PRIORITY, \
&nxp_gau_dac_driver_api);
DT_INST_FOREACH_STATUS_OKAY(NXP_GAU_DAC_INIT)