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iio: dac: add support for Microchip MCP48FEB02
This is the IIO driver for Microchip MCP48FxBy1/2/4/8 series of buffered voltage output Digital-to-Analog Converters with nonvolatile or volatile memory and an SPI Interface. The families support up to 8 output channels. The devices can be 8-bit, 10-bit and 12-bit. Signed-off-by: Ariana Lazar <ariana.lazar@microchip.com> Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
This commit is contained in:
Ariana Lazar
Jonathan Cameron
parent
0012616ab0
commit
23980cf544
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@ -636,6 +636,29 @@ config MCP47FEB02_I2C
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will be called mcp47feb02_i2c and you will also get
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mcp47feb02_core for the core module.
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config MCP47FEB02_SPI
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tristate "MCP48F(E/V)B01/02/04/08/11/12/14/18/21/22/24/28 SPI DAC driver"
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depends on SPI
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select REGMAP_SPI
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select MCP47FEB02
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help
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Say yes here if you want to build the driver for the Microchip:
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- 8-bit DAC:
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MCP48FEB01, MCP48FEB02, MCP48FEB04, MCP48FEB08,
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MCP48FVB01, MCP48FVB02, MCP48FVB04, MCP48FVB08
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- 10-bit DAC:
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MCP48FEB11, MCP48FEB12, MCP48FEB14, MCP48FEB18,
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MCP48FVB11, MCP48FVB12, MCP48FVB14, MCP48FVB18
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- 12-bit DAC:
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MCP48FEB21, MCP48FEB22, MCP48FEB24, MCP48FEB28,
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MCP48FVB21, MCP48FVB22, MCP48FVB24, MCP48FVB28
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having 1 to 8 channels, 8/10/12-bit digital-to-analog converter
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(DAC) with SPI interface.
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To compile this driver as a module, choose M here: the module
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will be called mcp47feb02_spi and you will also get
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mcp47feb02_core for the core module.
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config MCP4821
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tristate "MCP4801/02/11/12/21/22 DAC driver"
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depends on SPI
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@ -59,6 +59,7 @@ obj-$(CONFIG_MCP4728) += mcp4728.o
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obj-$(CONFIG_MCP47A1) += mcp47a1.o
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obj-$(CONFIG_MCP47FEB02) += mcp47feb02-core.o
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obj-$(CONFIG_MCP47FEB02_I2C) += mcp47feb02-i2c.o
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obj-$(CONFIG_MCP47FEB02_SPI) += mcp47feb02-spi.o
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obj-$(CONFIG_MCP4821) += mcp4821.o
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obj-$(CONFIG_MCP4922) += mcp4922.o
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obj-$(CONFIG_STM32_DAC_CORE) += stm32-dac-core.o
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@ -980,5 +980,5 @@ int mcp47feb02_common_probe(const struct mcp47feb02_features *chip_features,
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EXPORT_SYMBOL_NS(mcp47feb02_common_probe, "IIO_MCP47FEB02");
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MODULE_AUTHOR("Ariana Lazar <ariana.lazar@microchip.com>");
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MODULE_DESCRIPTION("IIO driver for MCP47FEB02 Multi-Channel DAC with I2C interface");
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MODULE_DESCRIPTION("IIO driver for MCP47FEB02/MCP48FEB02 Multi-Channel DAC");
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MODULE_LICENSE("GPL");
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145
drivers/iio/dac/mcp47feb02-spi.c
Normal file
145
drivers/iio/dac/mcp47feb02-spi.c
Normal file
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@ -0,0 +1,145 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* IIO driver for MCP48FEB02 Multi-Channel DAC with SPI interface
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*
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* Copyright (C) 2025-2026 Microchip Technology Inc. and its subsidiaries
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*
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* Author: Ariana Lazar <ariana.lazar@microchip.com>
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*
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* Datasheet links for devices with SPI interface:
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* [MCP48FEBxx] https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/20005429B.pdf
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* [MCP48FVBxx] https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/20005466A.pdf
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* [MCP48FxBx4/8] https://ww1.microchip.com/downloads/aemDocuments/documents/MSLD/ProductDocuments/DataSheets/MCP48FXBX4-8-Family-Data-Sheet-DS20006362A.pdf
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*/
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#include <linux/dev_printk.h>
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/pm.h>
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#include <linux/regmap.h>
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#include <linux/spi/spi.h>
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#include <linux/types.h>
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#include "mcp47feb02.h"
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/* Parts with EEPROM memory */
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MCP47FEB02_CHIP_INFO(mcp48feb01, 1, 8, false, true);
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MCP47FEB02_CHIP_INFO(mcp48feb02, 2, 8, false, true);
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MCP47FEB02_CHIP_INFO(mcp48feb04, 4, 8, true, true);
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MCP47FEB02_CHIP_INFO(mcp48feb08, 8, 8, true, true);
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MCP47FEB02_CHIP_INFO(mcp48feb11, 1, 10, false, true);
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MCP47FEB02_CHIP_INFO(mcp48feb12, 2, 10, false, true);
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MCP47FEB02_CHIP_INFO(mcp48feb14, 4, 10, true, true);
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MCP47FEB02_CHIP_INFO(mcp48feb18, 8, 10, true, true);
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MCP47FEB02_CHIP_INFO(mcp48feb21, 1, 12, false, true);
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MCP47FEB02_CHIP_INFO(mcp48feb22, 2, 12, false, true);
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MCP47FEB02_CHIP_INFO(mcp48feb24, 4, 12, true, true);
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MCP47FEB02_CHIP_INFO(mcp48feb28, 8, 12, true, true);
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/* Parts without EEPROM memory */
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MCP47FEB02_CHIP_INFO(mcp48fvb01, 1, 8, false, false);
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MCP47FEB02_CHIP_INFO(mcp48fvb02, 2, 8, false, false);
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MCP47FEB02_CHIP_INFO(mcp48fvb04, 4, 8, true, false);
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MCP47FEB02_CHIP_INFO(mcp48fvb08, 8, 8, true, false);
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MCP47FEB02_CHIP_INFO(mcp48fvb11, 1, 10, false, false);
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MCP47FEB02_CHIP_INFO(mcp48fvb12, 2, 10, false, false);
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MCP47FEB02_CHIP_INFO(mcp48fvb14, 4, 10, true, false);
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MCP47FEB02_CHIP_INFO(mcp48fvb18, 8, 10, true, false);
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MCP47FEB02_CHIP_INFO(mcp48fvb21, 1, 12, false, false);
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MCP47FEB02_CHIP_INFO(mcp48fvb22, 2, 12, false, false);
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MCP47FEB02_CHIP_INFO(mcp48fvb24, 4, 12, true, false);
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MCP47FEB02_CHIP_INFO(mcp48fvb28, 8, 12, true, false);
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static int mcp47feb02_spi_probe(struct spi_device *spi)
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{
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const struct mcp47feb02_features *chip_features;
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struct device *dev = &spi->dev;
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struct regmap *regmap;
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chip_features = spi_get_device_match_data(spi);
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if (!chip_features)
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return dev_err_probe(dev, -ENODATA, "No match data found\n");
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if (chip_features->have_eeprom)
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regmap = devm_regmap_init_spi(spi, &mcp47feb02_regmap_config);
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else
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regmap = devm_regmap_init_spi(spi, &mcp47fvb02_regmap_config);
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if (IS_ERR(regmap))
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return dev_err_probe(dev, PTR_ERR(regmap), "Error initializing SPI regmap\n");
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return mcp47feb02_common_probe(chip_features, regmap);
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}
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static const struct spi_device_id mcp47feb02_spi_id[] = {
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{ .name = "mcp48feb01", .driver_data = (kernel_ulong_t)&mcp48feb01_chip_features },
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{ .name = "mcp48feb02", .driver_data = (kernel_ulong_t)&mcp48feb02_chip_features },
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{ .name = "mcp48feb04", .driver_data = (kernel_ulong_t)&mcp48feb04_chip_features },
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{ .name = "mcp48feb08", .driver_data = (kernel_ulong_t)&mcp48feb08_chip_features },
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{ .name = "mcp48feb11", .driver_data = (kernel_ulong_t)&mcp48feb11_chip_features },
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{ .name = "mcp48feb12", .driver_data = (kernel_ulong_t)&mcp48feb12_chip_features },
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{ .name = "mcp48feb14", .driver_data = (kernel_ulong_t)&mcp48feb14_chip_features },
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{ .name = "mcp48feb18", .driver_data = (kernel_ulong_t)&mcp48feb18_chip_features },
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{ .name = "mcp48feb21", .driver_data = (kernel_ulong_t)&mcp48feb21_chip_features },
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{ .name = "mcp48feb22", .driver_data = (kernel_ulong_t)&mcp48feb22_chip_features },
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{ .name = "mcp48feb24", .driver_data = (kernel_ulong_t)&mcp48feb24_chip_features },
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{ .name = "mcp48feb28", .driver_data = (kernel_ulong_t)&mcp48feb28_chip_features },
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{ .name = "mcp48fvb01", .driver_data = (kernel_ulong_t)&mcp48fvb01_chip_features },
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{ .name = "mcp48fvb02", .driver_data = (kernel_ulong_t)&mcp48fvb02_chip_features },
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{ .name = "mcp48fvb04", .driver_data = (kernel_ulong_t)&mcp48fvb04_chip_features },
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{ .name = "mcp48fvb08", .driver_data = (kernel_ulong_t)&mcp48fvb08_chip_features },
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{ .name = "mcp48fvb11", .driver_data = (kernel_ulong_t)&mcp48fvb11_chip_features },
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{ .name = "mcp48fvb12", .driver_data = (kernel_ulong_t)&mcp48fvb12_chip_features },
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{ .name = "mcp48fvb14", .driver_data = (kernel_ulong_t)&mcp48fvb14_chip_features },
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{ .name = "mcp48fvb18", .driver_data = (kernel_ulong_t)&mcp48fvb18_chip_features },
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{ .name = "mcp48fvb21", .driver_data = (kernel_ulong_t)&mcp48fvb21_chip_features },
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{ .name = "mcp48fvb22", .driver_data = (kernel_ulong_t)&mcp48fvb22_chip_features },
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{ .name = "mcp48fvb24", .driver_data = (kernel_ulong_t)&mcp48fvb24_chip_features },
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{ .name = "mcp48fvb28", .driver_data = (kernel_ulong_t)&mcp48fvb28_chip_features },
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{ }
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};
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MODULE_DEVICE_TABLE(spi, mcp47feb02_spi_id);
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static const struct of_device_id mcp47feb02_of_spi_match[] = {
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{ .compatible = "microchip,mcp48feb01", .data = &mcp48feb01_chip_features },
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{ .compatible = "microchip,mcp48feb02", .data = &mcp48feb02_chip_features },
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{ .compatible = "microchip,mcp48feb04", .data = &mcp48feb04_chip_features },
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{ .compatible = "microchip,mcp48feb08", .data = &mcp48feb08_chip_features },
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{ .compatible = "microchip,mcp48feb11", .data = &mcp48feb11_chip_features },
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{ .compatible = "microchip,mcp48feb12", .data = &mcp48feb12_chip_features },
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{ .compatible = "microchip,mcp48feb14", .data = &mcp48feb14_chip_features },
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{ .compatible = "microchip,mcp48feb18", .data = &mcp48feb18_chip_features },
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{ .compatible = "microchip,mcp48feb21", .data = &mcp48feb21_chip_features },
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{ .compatible = "microchip,mcp48feb22", .data = &mcp48feb22_chip_features },
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{ .compatible = "microchip,mcp48feb24", .data = &mcp48feb24_chip_features },
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{ .compatible = "microchip,mcp48feb28", .data = &mcp48feb28_chip_features },
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{ .compatible = "microchip,mcp48fvb01", .data = &mcp48fvb01_chip_features },
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{ .compatible = "microchip,mcp48fvb02", .data = &mcp48fvb02_chip_features },
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{ .compatible = "microchip,mcp48fvb04", .data = &mcp48fvb04_chip_features },
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{ .compatible = "microchip,mcp48fvb08", .data = &mcp48fvb08_chip_features },
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{ .compatible = "microchip,mcp48fvb11", .data = &mcp48fvb11_chip_features },
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{ .compatible = "microchip,mcp48fvb12", .data = &mcp48fvb12_chip_features },
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{ .compatible = "microchip,mcp48fvb14", .data = &mcp48fvb14_chip_features },
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{ .compatible = "microchip,mcp48fvb18", .data = &mcp48fvb18_chip_features },
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{ .compatible = "microchip,mcp48fvb21", .data = &mcp48fvb21_chip_features },
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{ .compatible = "microchip,mcp48fvb22", .data = &mcp48fvb22_chip_features },
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{ .compatible = "microchip,mcp48fvb24", .data = &mcp48fvb24_chip_features },
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{ .compatible = "microchip,mcp48fvb28", .data = &mcp48fvb28_chip_features },
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{ }
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};
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MODULE_DEVICE_TABLE(of, mcp47feb02_of_spi_match);
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static struct spi_driver mcp47feb02_spi_driver = {
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.driver = {
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.name = "mcp47feb02",
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.of_match_table = mcp47feb02_of_spi_match,
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.pm = pm_sleep_ptr(&mcp47feb02_pm_ops),
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},
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.probe = mcp47feb02_spi_probe,
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.id_table = mcp47feb02_spi_id,
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};
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module_spi_driver(mcp47feb02_spi_driver);
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MODULE_AUTHOR("Ariana Lazar <ariana.lazar@microchip.com>");
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MODULE_DESCRIPTION("IIO driver for MCP48FEB02 Multi-Channel DAC with SPI interface");
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MODULE_LICENSE("GPL");
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MODULE_IMPORT_NS("IIO_MCP47FEB02");
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