diff options
Diffstat (limited to 'drivers/iio/adc')
| -rw-r--r-- | drivers/iio/adc/Kconfig | 12 | ||||
| -rw-r--r-- | drivers/iio/adc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/iio/adc/sd_adc_modulator.c | 68 |
3 files changed, 81 insertions, 0 deletions
diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index ef86296b8b0d..5f9d04a8ba53 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -629,6 +629,18 @@ config SPEAR_ADC To compile this driver as a module, choose M here: the module will be called spear_adc. +config SD_ADC_MODULATOR + tristate "Generic sigma delta modulator" + depends on OF + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + help + Select this option to enables sigma delta modulator. This driver can + support generic sigma delta modulators. + + This driver can also be built as a module. If so, the module + will be called sd_adc_modulator. + config STM32_ADC_CORE tristate "STMicroelectronics STM32 adc core" depends on ARCH_STM32 || COMPILE_TEST diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile index 9572c1090f35..fa5e7949f642 100644 --- a/drivers/iio/adc/Makefile +++ b/drivers/iio/adc/Makefile @@ -82,3 +82,4 @@ obj-$(CONFIG_VF610_ADC) += vf610_adc.o obj-$(CONFIG_VIPERBOARD_ADC) += viperboard_adc.o xilinx-xadc-y := xilinx-xadc-core.o xilinx-xadc-events.o obj-$(CONFIG_XILINX_XADC) += xilinx-xadc.o +obj-$(CONFIG_SD_ADC_MODULATOR) += sd_adc_modulator.o diff --git a/drivers/iio/adc/sd_adc_modulator.c b/drivers/iio/adc/sd_adc_modulator.c new file mode 100644 index 000000000000..560d8c7d9d86 --- /dev/null +++ b/drivers/iio/adc/sd_adc_modulator.c @@ -0,0 +1,68 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Generic sigma delta modulator driver + * + * Copyright (C) 2017, STMicroelectronics - All Rights Reserved + * Author: Arnaud Pouliquen <arnaud.pouliquen@st.com>. + */ + +#include <linux/iio/iio.h> +#include <linux/iio/triggered_buffer.h> +#include <linux/module.h> +#include <linux/of_device.h> + +static const struct iio_info iio_sd_mod_iio_info; + +static const struct iio_chan_spec iio_sd_mod_ch = { + .type = IIO_VOLTAGE, + .indexed = 1, + .scan_type = { + .sign = 'u', + .realbits = 1, + .shift = 0, + }, +}; + +static int iio_sd_mod_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct iio_dev *iio; + + iio = devm_iio_device_alloc(dev, 0); + if (!iio) + return -ENOMEM; + + iio->dev.parent = dev; + iio->dev.of_node = dev->of_node; + iio->name = dev_name(dev); + iio->info = &iio_sd_mod_iio_info; + iio->modes = INDIO_BUFFER_HARDWARE; + + iio->num_channels = 1; + iio->channels = &iio_sd_mod_ch; + + platform_set_drvdata(pdev, iio); + + return devm_iio_device_register(&pdev->dev, iio); +} + +static const struct of_device_id sd_adc_of_match[] = { + { .compatible = "sd-modulator" }, + { .compatible = "ads1201" }, + { } +}; +MODULE_DEVICE_TABLE(of, sd_adc_of_match); + +static struct platform_driver iio_sd_mod_adc = { + .driver = { + .name = "iio_sd_adc_mod", + .of_match_table = of_match_ptr(sd_adc_of_match), + }, + .probe = iio_sd_mod_probe, +}; + +module_platform_driver(iio_sd_mod_adc); + +MODULE_DESCRIPTION("Basic sigma delta modulator"); +MODULE_AUTHOR("Arnaud Pouliquen <arnaud.pouliquen@st.com>"); +MODULE_LICENSE("GPL v2"); |