From 23980cf5443b403182b42da409cef0cc14f733f8 Mon Sep 17 00:00:00 2001 From: Ariana Lazar Date: Thu, 24 Sep 2026 15:59:23 +0300 Subject: [PATCH] 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 Signed-off-by: Jonathan Cameron --- drivers/iio/dac/Kconfig | 23 +++++ drivers/iio/dac/Makefile | 1 + drivers/iio/dac/mcp47feb02-core.c | 2 +- drivers/iio/dac/mcp47feb02-spi.c | 145 ++++++++++++++++++++++++++++++ 4 files changed, 170 insertions(+), 1 deletion(-) create mode 100644 drivers/iio/dac/mcp47feb02-spi.c diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig index 8121a71945f6..e373885e7c7a 100644 --- a/drivers/iio/dac/Kconfig +++ b/drivers/iio/dac/Kconfig @@ -636,6 +636,29 @@ config MCP47FEB02_I2C will be called mcp47feb02_i2c and you will also get mcp47feb02_core for the core module. +config MCP47FEB02_SPI + tristate "MCP48F(E/V)B01/02/04/08/11/12/14/18/21/22/24/28 SPI DAC driver" + depends on SPI + select REGMAP_SPI + select MCP47FEB02 + help + Say yes here if you want to build the driver for the Microchip: + - 8-bit DAC: + MCP48FEB01, MCP48FEB02, MCP48FEB04, MCP48FEB08, + MCP48FVB01, MCP48FVB02, MCP48FVB04, MCP48FVB08 + - 10-bit DAC: + MCP48FEB11, MCP48FEB12, MCP48FEB14, MCP48FEB18, + MCP48FVB11, MCP48FVB12, MCP48FVB14, MCP48FVB18 + - 12-bit DAC: + MCP48FEB21, MCP48FEB22, MCP48FEB24, MCP48FEB28, + MCP48FVB21, MCP48FVB22, MCP48FVB24, MCP48FVB28 + having 1 to 8 channels, 8/10/12-bit digital-to-analog converter + (DAC) with SPI interface. + + To compile this driver as a module, choose M here: the module + will be called mcp47feb02_spi and you will also get + mcp47feb02_core for the core module. + config MCP4821 tristate "MCP4801/02/11/12/21/22 DAC driver" depends on SPI diff --git a/drivers/iio/dac/Makefile b/drivers/iio/dac/Makefile index 4394278d9fd8..2cd0fe23db9e 100644 --- a/drivers/iio/dac/Makefile +++ b/drivers/iio/dac/Makefile @@ -59,6 +59,7 @@ obj-$(CONFIG_MCP4728) += mcp4728.o obj-$(CONFIG_MCP47A1) += mcp47a1.o obj-$(CONFIG_MCP47FEB02) += mcp47feb02-core.o obj-$(CONFIG_MCP47FEB02_I2C) += mcp47feb02-i2c.o +obj-$(CONFIG_MCP47FEB02_SPI) += mcp47feb02-spi.o obj-$(CONFIG_MCP4821) += mcp4821.o obj-$(CONFIG_MCP4922) += mcp4922.o obj-$(CONFIG_STM32_DAC_CORE) += stm32-dac-core.o diff --git a/drivers/iio/dac/mcp47feb02-core.c b/drivers/iio/dac/mcp47feb02-core.c index ede2c5381eda..88bffbab0854 100644 --- a/drivers/iio/dac/mcp47feb02-core.c +++ b/drivers/iio/dac/mcp47feb02-core.c @@ -980,5 +980,5 @@ int mcp47feb02_common_probe(const struct mcp47feb02_features *chip_features, EXPORT_SYMBOL_NS(mcp47feb02_common_probe, "IIO_MCP47FEB02"); MODULE_AUTHOR("Ariana Lazar "); -MODULE_DESCRIPTION("IIO driver for MCP47FEB02 Multi-Channel DAC with I2C interface"); +MODULE_DESCRIPTION("IIO driver for MCP47FEB02/MCP48FEB02 Multi-Channel DAC"); MODULE_LICENSE("GPL"); diff --git a/drivers/iio/dac/mcp47feb02-spi.c b/drivers/iio/dac/mcp47feb02-spi.c new file mode 100644 index 000000000000..974f8fe1b86e --- /dev/null +++ b/drivers/iio/dac/mcp47feb02-spi.c @@ -0,0 +1,145 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * IIO driver for MCP48FEB02 Multi-Channel DAC with SPI interface + * + * Copyright (C) 2025-2026 Microchip Technology Inc. and its subsidiaries + * + * Author: Ariana Lazar + * + * Datasheet links for devices with SPI interface: + * [MCP48FEBxx] https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/20005429B.pdf + * [MCP48FVBxx] https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/20005466A.pdf + * [MCP48FxBx4/8] https://ww1.microchip.com/downloads/aemDocuments/documents/MSLD/ProductDocuments/DataSheets/MCP48FXBX4-8-Family-Data-Sheet-DS20006362A.pdf + */ +#include +#include +#include +#include +#include +#include +#include + +#include "mcp47feb02.h" + +/* Parts with EEPROM memory */ +MCP47FEB02_CHIP_INFO(mcp48feb01, 1, 8, false, true); +MCP47FEB02_CHIP_INFO(mcp48feb02, 2, 8, false, true); +MCP47FEB02_CHIP_INFO(mcp48feb04, 4, 8, true, true); +MCP47FEB02_CHIP_INFO(mcp48feb08, 8, 8, true, true); +MCP47FEB02_CHIP_INFO(mcp48feb11, 1, 10, false, true); +MCP47FEB02_CHIP_INFO(mcp48feb12, 2, 10, false, true); +MCP47FEB02_CHIP_INFO(mcp48feb14, 4, 10, true, true); +MCP47FEB02_CHIP_INFO(mcp48feb18, 8, 10, true, true); +MCP47FEB02_CHIP_INFO(mcp48feb21, 1, 12, false, true); +MCP47FEB02_CHIP_INFO(mcp48feb22, 2, 12, false, true); +MCP47FEB02_CHIP_INFO(mcp48feb24, 4, 12, true, true); +MCP47FEB02_CHIP_INFO(mcp48feb28, 8, 12, true, true); + +/* Parts without EEPROM memory */ +MCP47FEB02_CHIP_INFO(mcp48fvb01, 1, 8, false, false); +MCP47FEB02_CHIP_INFO(mcp48fvb02, 2, 8, false, false); +MCP47FEB02_CHIP_INFO(mcp48fvb04, 4, 8, true, false); +MCP47FEB02_CHIP_INFO(mcp48fvb08, 8, 8, true, false); +MCP47FEB02_CHIP_INFO(mcp48fvb11, 1, 10, false, false); +MCP47FEB02_CHIP_INFO(mcp48fvb12, 2, 10, false, false); +MCP47FEB02_CHIP_INFO(mcp48fvb14, 4, 10, true, false); +MCP47FEB02_CHIP_INFO(mcp48fvb18, 8, 10, true, false); +MCP47FEB02_CHIP_INFO(mcp48fvb21, 1, 12, false, false); +MCP47FEB02_CHIP_INFO(mcp48fvb22, 2, 12, false, false); +MCP47FEB02_CHIP_INFO(mcp48fvb24, 4, 12, true, false); +MCP47FEB02_CHIP_INFO(mcp48fvb28, 8, 12, true, false); + +static int mcp47feb02_spi_probe(struct spi_device *spi) +{ + const struct mcp47feb02_features *chip_features; + struct device *dev = &spi->dev; + struct regmap *regmap; + + chip_features = spi_get_device_match_data(spi); + if (!chip_features) + return dev_err_probe(dev, -ENODATA, "No match data found\n"); + + if (chip_features->have_eeprom) + regmap = devm_regmap_init_spi(spi, &mcp47feb02_regmap_config); + else + regmap = devm_regmap_init_spi(spi, &mcp47fvb02_regmap_config); + + if (IS_ERR(regmap)) + return dev_err_probe(dev, PTR_ERR(regmap), "Error initializing SPI regmap\n"); + + return mcp47feb02_common_probe(chip_features, regmap); +} + +static const struct spi_device_id mcp47feb02_spi_id[] = { + { .name = "mcp48feb01", .driver_data = (kernel_ulong_t)&mcp48feb01_chip_features }, + { .name = "mcp48feb02", .driver_data = (kernel_ulong_t)&mcp48feb02_chip_features }, + { .name = "mcp48feb04", .driver_data = (kernel_ulong_t)&mcp48feb04_chip_features }, + { .name = "mcp48feb08", .driver_data = (kernel_ulong_t)&mcp48feb08_chip_features }, + { .name = "mcp48feb11", .driver_data = (kernel_ulong_t)&mcp48feb11_chip_features }, + { .name = "mcp48feb12", .driver_data = (kernel_ulong_t)&mcp48feb12_chip_features }, + { .name = "mcp48feb14", .driver_data = (kernel_ulong_t)&mcp48feb14_chip_features }, + { .name = "mcp48feb18", .driver_data = (kernel_ulong_t)&mcp48feb18_chip_features }, + { .name = "mcp48feb21", .driver_data = (kernel_ulong_t)&mcp48feb21_chip_features }, + { .name = "mcp48feb22", .driver_data = (kernel_ulong_t)&mcp48feb22_chip_features }, + { .name = "mcp48feb24", .driver_data = (kernel_ulong_t)&mcp48feb24_chip_features }, + { .name = "mcp48feb28", .driver_data = (kernel_ulong_t)&mcp48feb28_chip_features }, + { .name = "mcp48fvb01", .driver_data = (kernel_ulong_t)&mcp48fvb01_chip_features }, + { .name = "mcp48fvb02", .driver_data = (kernel_ulong_t)&mcp48fvb02_chip_features }, + { .name = "mcp48fvb04", .driver_data = (kernel_ulong_t)&mcp48fvb04_chip_features }, + { .name = "mcp48fvb08", .driver_data = (kernel_ulong_t)&mcp48fvb08_chip_features }, + { .name = "mcp48fvb11", .driver_data = (kernel_ulong_t)&mcp48fvb11_chip_features }, + { .name = "mcp48fvb12", .driver_data = (kernel_ulong_t)&mcp48fvb12_chip_features }, + { .name = "mcp48fvb14", .driver_data = (kernel_ulong_t)&mcp48fvb14_chip_features }, + { .name = "mcp48fvb18", .driver_data = (kernel_ulong_t)&mcp48fvb18_chip_features }, + { .name = "mcp48fvb21", .driver_data = (kernel_ulong_t)&mcp48fvb21_chip_features }, + { .name = "mcp48fvb22", .driver_data = (kernel_ulong_t)&mcp48fvb22_chip_features }, + { .name = "mcp48fvb24", .driver_data = (kernel_ulong_t)&mcp48fvb24_chip_features }, + { .name = "mcp48fvb28", .driver_data = (kernel_ulong_t)&mcp48fvb28_chip_features }, + { } +}; +MODULE_DEVICE_TABLE(spi, mcp47feb02_spi_id); + +static const struct of_device_id mcp47feb02_of_spi_match[] = { + { .compatible = "microchip,mcp48feb01", .data = &mcp48feb01_chip_features }, + { .compatible = "microchip,mcp48feb02", .data = &mcp48feb02_chip_features }, + { .compatible = "microchip,mcp48feb04", .data = &mcp48feb04_chip_features }, + { .compatible = "microchip,mcp48feb08", .data = &mcp48feb08_chip_features }, + { .compatible = "microchip,mcp48feb11", .data = &mcp48feb11_chip_features }, + { .compatible = "microchip,mcp48feb12", .data = &mcp48feb12_chip_features }, + { .compatible = "microchip,mcp48feb14", .data = &mcp48feb14_chip_features }, + { .compatible = "microchip,mcp48feb18", .data = &mcp48feb18_chip_features }, + { .compatible = "microchip,mcp48feb21", .data = &mcp48feb21_chip_features }, + { .compatible = "microchip,mcp48feb22", .data = &mcp48feb22_chip_features }, + { .compatible = "microchip,mcp48feb24", .data = &mcp48feb24_chip_features }, + { .compatible = "microchip,mcp48feb28", .data = &mcp48feb28_chip_features }, + { .compatible = "microchip,mcp48fvb01", .data = &mcp48fvb01_chip_features }, + { .compatible = "microchip,mcp48fvb02", .data = &mcp48fvb02_chip_features }, + { .compatible = "microchip,mcp48fvb04", .data = &mcp48fvb04_chip_features }, + { .compatible = "microchip,mcp48fvb08", .data = &mcp48fvb08_chip_features }, + { .compatible = "microchip,mcp48fvb11", .data = &mcp48fvb11_chip_features }, + { .compatible = "microchip,mcp48fvb12", .data = &mcp48fvb12_chip_features }, + { .compatible = "microchip,mcp48fvb14", .data = &mcp48fvb14_chip_features }, + { .compatible = "microchip,mcp48fvb18", .data = &mcp48fvb18_chip_features }, + { .compatible = "microchip,mcp48fvb21", .data = &mcp48fvb21_chip_features }, + { .compatible = "microchip,mcp48fvb22", .data = &mcp48fvb22_chip_features }, + { .compatible = "microchip,mcp48fvb24", .data = &mcp48fvb24_chip_features }, + { .compatible = "microchip,mcp48fvb28", .data = &mcp48fvb28_chip_features }, + { } +}; +MODULE_DEVICE_TABLE(of, mcp47feb02_of_spi_match); + +static struct spi_driver mcp47feb02_spi_driver = { + .driver = { + .name = "mcp47feb02", + .of_match_table = mcp47feb02_of_spi_match, + .pm = pm_sleep_ptr(&mcp47feb02_pm_ops), + }, + .probe = mcp47feb02_spi_probe, + .id_table = mcp47feb02_spi_id, +}; +module_spi_driver(mcp47feb02_spi_driver); + +MODULE_AUTHOR("Ariana Lazar "); +MODULE_DESCRIPTION("IIO driver for MCP48FEB02 Multi-Channel DAC with SPI interface"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS("IIO_MCP47FEB02");