1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Generic sigma delta modulator driver
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
6*4882a593Smuzhiyun * Author: Arnaud Pouliquen <arnaud.pouliquen@st.com>.
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/iio/iio.h>
10*4882a593Smuzhiyun #include <linux/iio/triggered_buffer.h>
11*4882a593Smuzhiyun #include <linux/module.h>
12*4882a593Smuzhiyun #include <linux/mod_devicetable.h>
13*4882a593Smuzhiyun #include <linux/platform_device.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun static const struct iio_info iio_sd_mod_iio_info;
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun static const struct iio_chan_spec iio_sd_mod_ch = {
18*4882a593Smuzhiyun .type = IIO_VOLTAGE,
19*4882a593Smuzhiyun .indexed = 1,
20*4882a593Smuzhiyun .scan_type = {
21*4882a593Smuzhiyun .sign = 'u',
22*4882a593Smuzhiyun .realbits = 1,
23*4882a593Smuzhiyun .shift = 0,
24*4882a593Smuzhiyun },
25*4882a593Smuzhiyun };
26*4882a593Smuzhiyun
iio_sd_mod_probe(struct platform_device * pdev)27*4882a593Smuzhiyun static int iio_sd_mod_probe(struct platform_device *pdev)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun struct device *dev = &pdev->dev;
30*4882a593Smuzhiyun struct iio_dev *iio;
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun iio = devm_iio_device_alloc(dev, 0);
33*4882a593Smuzhiyun if (!iio)
34*4882a593Smuzhiyun return -ENOMEM;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun iio->name = dev_name(dev);
37*4882a593Smuzhiyun iio->info = &iio_sd_mod_iio_info;
38*4882a593Smuzhiyun iio->modes = INDIO_BUFFER_HARDWARE;
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun iio->num_channels = 1;
41*4882a593Smuzhiyun iio->channels = &iio_sd_mod_ch;
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun platform_set_drvdata(pdev, iio);
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun return devm_iio_device_register(&pdev->dev, iio);
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun static const struct of_device_id sd_adc_of_match[] = {
49*4882a593Smuzhiyun { .compatible = "sd-modulator" },
50*4882a593Smuzhiyun { .compatible = "ads1201" },
51*4882a593Smuzhiyun { }
52*4882a593Smuzhiyun };
53*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, sd_adc_of_match);
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun static struct platform_driver iio_sd_mod_adc = {
56*4882a593Smuzhiyun .driver = {
57*4882a593Smuzhiyun .name = "iio_sd_adc_mod",
58*4882a593Smuzhiyun .of_match_table = sd_adc_of_match,
59*4882a593Smuzhiyun },
60*4882a593Smuzhiyun .probe = iio_sd_mod_probe,
61*4882a593Smuzhiyun };
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun module_platform_driver(iio_sd_mod_adc);
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun MODULE_DESCRIPTION("Basic sigma delta modulator");
66*4882a593Smuzhiyun MODULE_AUTHOR("Arnaud Pouliquen <arnaud.pouliquen@st.com>");
67*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
68