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");
68