drivers: dac: esp32: Add support for DAC controller (f86a7d2c) · Commits · Wenxi XU / zephyr

boards/xtensa/esp32/esp32.yaml

+1 −0

Original line number	Diff line number	Diff line
		@@ -11,6 +11,7 @@ supported:
		- uart
		- nvs
		- pwm
		- dac
		testing:
		ignore_tags:
		- net

drivers/dac/CMakeLists.txt

+1 −0

Original line number	Diff line number	Diff line
		@@ -13,4 +13,5 @@ zephyr_library_sources_ifdef(CONFIG_DAC_SHELL dac_shell.c)
		zephyr_library_sources_ifdef(CONFIG_DAC_MCP4725 dac_mcp4725.c)
		zephyr_library_sources_ifdef(CONFIG_DAC_MCP4728 dac_mcp4728.c)
		zephyr_library_sources_ifdef(CONFIG_DAC_GD32 dac_gd32.c)
		zephyr_library_sources_ifdef(CONFIG_DAC_ESP32 dac_esp32.c)
		zephyr_library_sources_ifdef(CONFIG_USERSPACE dac_handlers.c)

drivers/dac/Kconfig

+2 −0

Original line number	Diff line number	Diff line
		@@ -48,4 +48,6 @@ source "drivers/dac/Kconfig.mcp4728"

		source "drivers/dac/Kconfig.gd32"

		source "drivers/dac/Kconfig.esp32"

		endif # DAC

drivers/dac/Kconfig.esp32

0 → 100644

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		# ESP32 DAC configuration options

		# Copyright (c) 2022 Espressif Systems (Shanghai) Co., Ltd.
		# SPDX-License-Identifier: Apache-2.0

		config DAC_ESP32
		bool "ESP32 DAC driver"
		default y
		depends on DT_HAS_ESPRESSIF_ESP32_DAC_ENABLED
		help
		Enable the ESP32 DAC driver

drivers/dac/dac_esp32.c

0 → 100644

+99 −0

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		/*
		* 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 <hal/dac_hal.h>
		#include <hal/dac_types.h>
		#include "driver/dac_common.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 > DAC_CHANNEL_MAX) {
		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);

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