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 | |
15 | static const struct iio_info iio_sd_mod_iio_info; |
16 | |
17 | static 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 | |
27 | static 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(parent: dev, sizeof_priv: 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, data: iio); |
44 | |
45 | return devm_iio_device_register(&pdev->dev, iio); |
46 | } |
47 | |
48 | static const struct of_device_id sd_adc_of_match[] = { |
49 | { .compatible = "sd-modulator" }, |
50 | { .compatible = "ads1201" }, |
51 | { } |
52 | }; |
53 | MODULE_DEVICE_TABLE(of, sd_adc_of_match); |
54 | |
55 | static 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 | |
63 | module_platform_driver(iio_sd_mod_adc); |
64 | |
65 | MODULE_DESCRIPTION("Basic sigma delta modulator" ); |
66 | MODULE_AUTHOR("Arnaud Pouliquen <arnaud.pouliquen@st.com>" ); |
67 | MODULE_LICENSE("GPL v2" ); |
68 | |