drivers: dac: add driver for AD5592 (2c09999d) · Commits · Wenxi XU / zephyr

CODEOWNERS

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		@@ -275,6 +275,7 @@
		/drivers/display/display_ili9342c.* @extremegtx
		/drivers/dac/ @martinjaeger
		/drivers/dac/ad56xx @benediktibk
		/drivers/dac/dac_ad5592.c @bbilas
		/drivers/dai/ @kv2019i @marcinszkudlinski @abonislawski
		/drivers/dai/intel/ @kv2019i @marcinszkudlinski @abonislawski
		/drivers/dai/intel/ssp/ @kv2019i @marcinszkudlinski @abonislawski

drivers/dac/CMakeLists.txt

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		@@ -18,5 +18,6 @@ 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_DAC_AD5592 dac_ad5592.c)
		zephyr_library_sources_ifdef(CONFIG_DAC_AD56XX dac_ad56xx.c)
		zephyr_library_sources_ifdef(CONFIG_USERSPACE dac_handlers.c)

drivers/dac/Kconfig

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		@@ -54,4 +54,6 @@ source "drivers/dac/Kconfig.esp32"

		source "drivers/dac/Kconfig.ad56xx"

		source "drivers/dac/Kconfig.ad5592"

		endif # DAC

drivers/dac/Kconfig.ad5592

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		# Copyright (c) 2023 Grinn
		# SPDX -License-Identifier: Apache-2.0

		config DAC_AD5592
		bool "AD5592 DAC driver"
		default y
		depends on DT_HAS_ADI_AD5592_DAC_ENABLED
		select MFD
		help
		Enable the AD5592 DAC driver.

drivers/dac/dac_ad5592.c

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		/*
		* Copyright (c) 2023 Grinn
		* SPDX-License-Identifier: Apache-2.0
		*/

		#define DT_DRV_COMPAT adi_ad5592_dac

		#include <zephyr/drivers/dac.h>
		#include <zephyr/kernel.h>
		#include <zephyr/sys/byteorder.h>

		#include <zephyr/drivers/mfd/ad5592.h>

		#include <zephyr/logging/log.h>
		LOG_MODULE_REGISTER(dac_ad5592, CONFIG_DAC_LOG_LEVEL);

		#define AD5592_DAC_RESOLUTION 12
		#define AD5592_DAC_WR_MSB_BIT BIT(15)
		#define AD5592_DAC_CHANNEL_SHIFT_VAL 12

		struct dac_ad5592_config {
		const struct device *mfd_dev;
		};

		struct dac_ad5592_data {
		uint8_t dac_conf;
		};

		static int dac_ad5592_channel_setup(const struct device *dev,
		const struct dac_channel_cfg *channel_cfg)
		{
		const struct dac_ad5592_config *config = dev->config;
		struct dac_ad5592_data *data = dev->data;

		if (channel_cfg->channel_id >= AD5592_PIN_MAX) {
		LOG_ERR("Invalid channel number %d", channel_cfg->channel_id);
		return -EINVAL;
		}

		if (channel_cfg->resolution != AD5592_DAC_RESOLUTION) {
		LOG_ERR("Invalid resolution %d", channel_cfg->resolution);
		return -EINVAL;
		}

		data->dac_conf \|= BIT(channel_cfg->channel_id);

		return mfd_ad5592_write_reg(config->mfd_dev, AD5592_REG_LDAC_EN, data->dac_conf);
		}

		static int dac_ad5592_write_value(const struct device *dev, uint8_t channel,
		uint32_t value)
		{
		const struct dac_ad5592_config *config = dev->config;
		uint16_t msg;

		if (channel >= AD5592_PIN_MAX) {
		LOG_ERR("Invalid channel number %d", channel);
		return -EINVAL;
		}

		if (value >= (1 << AD5592_DAC_RESOLUTION)) {
		LOG_ERR("Value %d out of range", value);
		return -EINVAL;
		}

		msg = sys_cpu_to_be16(AD5592_DAC_WR_MSB_BIT \|
		channel << AD5592_DAC_CHANNEL_SHIFT_VAL \|
		value);

		return mfd_ad5592_write_raw(config->mfd_dev, msg);
		}

		static const struct dac_driver_api dac_ad5592_api = {
		.channel_setup = dac_ad5592_channel_setup,
		.write_value = dac_ad5592_write_value,
		};

		static int dac_ad5592_init(const struct device *dev)
		{
		const struct dac_ad5592_config *config = dev->config;
		int ret;

		if (!device_is_ready(config->mfd_dev)) {
		return -ENODEV;
		}

		ret = mfd_ad5592_write_reg(config->mfd_dev, AD5592_REG_PD_REF_CTRL, AD5592_EN_REF);
		if (ret < 0) {
		return ret;
		}

		return 0;
		}

		#define DAC_AD5592_DEFINE(inst) \
		static const struct dac_ad5592_config dac_ad5592_config##inst = { \
		.mfd_dev = DEVICE_DT_GET(DT_INST_PARENT(inst)), \
		}; \
		\
		struct dac_ad5592_data dac_ad5592_data##inst; \
		\
		DEVICE_DT_INST_DEFINE(inst, dac_ad5592_init, NULL, \
		&dac_ad5592_data##inst, &dac_ad5592_config##inst, \
		POST_KERNEL, CONFIG_MFD_INIT_PRIORITY, \
		&dac_ad5592_api);

		DT_INST_FOREACH_STATUS_OKAY(DAC_AD5592_DEFINE)

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