blob: 9dc16106eee2bf4c20c36240c71675529a8cfdca [file] [log] [blame]
/*
* Copyright (c) 2022 Espressif Systems (Shanghai) Co., Ltd.
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT espressif_esp32_dac
#include <soc.h>
#include <zephyr/device.h>
#include <zephyr/drivers/dac.h>
#include <zephyr/drivers/clock_control.h>
#include <hal/rtc_io_types.h>
#include <hal/rtc_io_hal.h>
#include <hal/rtc_io_ll.h>
#include "driver/dac.h"
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(esp32_dac, CONFIG_DAC_LOG_LEVEL);
struct dac_esp32_config {
int irq_source;
const struct device *clock_dev;
clock_control_subsys_t clock_subsys;
};
static int dac_esp32_write_value(const struct device *dev,
uint8_t channel, uint32_t value)
{
ARG_UNUSED(dev);
dac_output_voltage(channel, value);
return 0;
}
static int dac_esp32_channel_setup(const struct device *dev,
const struct dac_channel_cfg *channel_cfg)
{
ARG_UNUSED(dev);
if (channel_cfg->channel_id > SOC_DAC_CHAN_NUM) {
LOG_ERR("Channel %d is not valid", channel_cfg->channel_id);
return -EINVAL;
}
dac_output_enable(channel_cfg->channel_id);
return 0;
}
static int dac_esp32_init(const struct device *dev)
{
const struct dac_esp32_config *cfg = dev->config;
if (!cfg->clock_dev) {
LOG_ERR("Clock device missing");
return -EINVAL;
}
if (!device_is_ready(cfg->clock_dev)) {
LOG_ERR("Clock device not ready");
return -ENODEV;
}
if (clock_control_on(cfg->clock_dev,
(clock_control_subsys_t) &cfg->clock_subsys) != 0) {
LOG_ERR("DAC clock setup failed (%d)", -EIO);
return -EIO;
}
return 0;
}
static const struct dac_driver_api dac_esp32_driver_api = {
.channel_setup = dac_esp32_channel_setup,
.write_value = dac_esp32_write_value
};
#define ESP32_DAC_INIT(id) \
\
static const struct dac_esp32_config dac_esp32_config_##id = { \
.irq_source = DT_INST_IRQN(id), \
.clock_dev = DEVICE_DT_GET(DT_INST_CLOCKS_CTLR(id)), \
.clock_subsys = (clock_control_subsys_t) DT_INST_CLOCKS_CELL(id, offset), \
}; \
\
DEVICE_DT_INST_DEFINE(id, \
&dac_esp32_init, \
NULL, \
NULL, \
&dac_esp32_config_##id, \
POST_KERNEL, \
CONFIG_DAC_INIT_PRIORITY, \
&dac_esp32_driver_api);
DT_INST_FOREACH_STATUS_OKAY(ESP32_DAC_INIT);