| /* |
| * Copyright (c) 2020 Henrik Brix Andersen <henrik@brixandersen.dk> |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #define DT_DRV_COMPAT nxp_kinetis_dac |
| |
| #include <zephyr/kernel.h> |
| #include <zephyr/drivers/dac.h> |
| #include <zephyr/logging/log.h> |
| |
| #include <fsl_dac.h> |
| |
| LOG_MODULE_REGISTER(dac_mcux_dac, CONFIG_DAC_LOG_LEVEL); |
| |
| struct mcux_dac_config { |
| DAC_Type *base; |
| dac_reference_voltage_source_t reference; |
| bool low_power; |
| }; |
| |
| struct mcux_dac_data { |
| bool configured; |
| }; |
| |
| static int mcux_dac_channel_setup(const struct device *dev, |
| const struct dac_channel_cfg *channel_cfg) |
| { |
| const struct mcux_dac_config *config = dev->config; |
| struct mcux_dac_data *data = dev->data; |
| dac_config_t dac_config; |
| |
| if (channel_cfg->channel_id != 0) { |
| LOG_ERR("unsupported channel %d", channel_cfg->channel_id); |
| return -ENOTSUP; |
| } |
| |
| if (channel_cfg->resolution != 12) { |
| LOG_ERR("unsupported resolution %d", channel_cfg->resolution); |
| return -ENOTSUP; |
| } |
| |
| DAC_GetDefaultConfig(&dac_config); |
| dac_config.enableLowPowerMode = config->low_power; |
| dac_config.referenceVoltageSource = config->reference; |
| |
| DAC_Init(config->base, &dac_config); |
| |
| data->configured = true; |
| |
| return 0; |
| } |
| |
| static int mcux_dac_write_value(const struct device *dev, uint8_t channel, |
| uint32_t value) |
| { |
| const struct mcux_dac_config *config = dev->config; |
| struct mcux_dac_data *data = dev->data; |
| |
| if (!data->configured) { |
| LOG_ERR("channel not initialized"); |
| return -EINVAL; |
| } |
| |
| if (channel != 0) { |
| LOG_ERR("unsupported channel %d", channel); |
| return -ENOTSUP; |
| } |
| |
| if (value >= 4096) { |
| LOG_ERR("value %d out of range", value); |
| return -EINVAL; |
| } |
| |
| /* Static operation */ |
| DAC_EnableBuffer(config->base, false); |
| |
| DAC_SetBufferValue(config->base, 0, value); |
| DAC_Enable(config->base, true); |
| |
| return 0; |
| } |
| |
| static const struct dac_driver_api mcux_dac_driver_api = { |
| .channel_setup = mcux_dac_channel_setup, |
| .write_value = mcux_dac_write_value, |
| }; |
| |
| #define TO_DAC_VREF_SRC(val) \ |
| _DO_CONCAT(kDAC_ReferenceVoltageSourceVref, val) |
| |
| #define MCUX_DAC_INIT(n) \ |
| static struct mcux_dac_data mcux_dac_data_##n; \ |
| \ |
| static const struct mcux_dac_config mcux_dac_config_##n = { \ |
| .base = (DAC_Type *)DT_INST_REG_ADDR(n), \ |
| .reference = \ |
| TO_DAC_VREF_SRC(DT_INST_PROP(n, voltage_reference)), \ |
| .low_power = DT_INST_PROP(n, low_power_mode), \ |
| }; \ |
| \ |
| DEVICE_DT_INST_DEFINE(n, NULL, NULL, \ |
| &mcux_dac_data_##n, \ |
| &mcux_dac_config_##n, \ |
| POST_KERNEL, CONFIG_DAC_INIT_PRIORITY, \ |
| &mcux_dac_driver_api); |
| |
| DT_INST_FOREACH_STATUS_OKAY(MCUX_DAC_INIT) |