102 lines
2.3 KiB
C
102 lines
2.3 KiB
C
/*
|
|
* 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;
|
|
}
|
|
|
|
if (channel_cfg->internal) {
|
|
LOG_ERR("Internal channels not supported");
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
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);
|