cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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sd_adc_modulator.c (1526B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Generic sigma delta modulator driver
      4 *
      5 * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
      6 * Author: Arnaud Pouliquen <arnaud.pouliquen@st.com>.
      7 */
      8
      9#include <linux/iio/iio.h>
     10#include <linux/iio/triggered_buffer.h>
     11#include <linux/module.h>
     12#include <linux/mod_devicetable.h>
     13#include <linux/platform_device.h>
     14
     15static const struct iio_info iio_sd_mod_iio_info;
     16
     17static const struct iio_chan_spec iio_sd_mod_ch = {
     18	.type = IIO_VOLTAGE,
     19	.indexed = 1,
     20	.scan_type = {
     21		.sign = 'u',
     22		.realbits = 1,
     23		.shift = 0,
     24	},
     25};
     26
     27static int iio_sd_mod_probe(struct platform_device *pdev)
     28{
     29	struct device *dev = &pdev->dev;
     30	struct iio_dev *iio;
     31
     32	iio = devm_iio_device_alloc(dev, 0);
     33	if (!iio)
     34		return -ENOMEM;
     35
     36	iio->name = dev_name(dev);
     37	iio->info = &iio_sd_mod_iio_info;
     38	iio->modes = INDIO_BUFFER_HARDWARE;
     39
     40	iio->num_channels = 1;
     41	iio->channels = &iio_sd_mod_ch;
     42
     43	platform_set_drvdata(pdev, iio);
     44
     45	return devm_iio_device_register(&pdev->dev, iio);
     46}
     47
     48static const struct of_device_id sd_adc_of_match[] = {
     49	{ .compatible = "sd-modulator" },
     50	{ .compatible = "ads1201" },
     51	{ }
     52};
     53MODULE_DEVICE_TABLE(of, sd_adc_of_match);
     54
     55static struct platform_driver iio_sd_mod_adc = {
     56	.driver = {
     57		.name = "iio_sd_adc_mod",
     58		.of_match_table = sd_adc_of_match,
     59	},
     60	.probe = iio_sd_mod_probe,
     61};
     62
     63module_platform_driver(iio_sd_mod_adc);
     64
     65MODULE_DESCRIPTION("Basic sigma delta modulator");
     66MODULE_AUTHOR("Arnaud Pouliquen <arnaud.pouliquen@st.com>");
     67MODULE_LICENSE("GPL v2");