/* * Copyright (c) 2022 Espressif Systems (Shanghai) Co., Ltd. * * SPDX-License-Identifier: Apache-2.0 */ #define DT_DRV_COMPAT espressif_esp32_dac #include #include #include #include #include #include #include #include "driver/dac.h" #include 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);