1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * AD7091R5 Analog to Digital converter driver
4 *
5 * Copyright 2014-2019 Analog Devices Inc.
6 */
7
8 #include <linux/i2c.h>
9 #include <linux/iio/iio.h>
10 #include <linux/module.h>
11 #include <linux/regmap.h>
12
13 #include "ad7091r-base.h"
14
15 static const struct iio_event_spec ad7091r5_events[] = {
16 {
17 .type = IIO_EV_TYPE_THRESH,
18 .dir = IIO_EV_DIR_RISING,
19 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
20 BIT(IIO_EV_INFO_ENABLE),
21 },
22 {
23 .type = IIO_EV_TYPE_THRESH,
24 .dir = IIO_EV_DIR_FALLING,
25 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
26 BIT(IIO_EV_INFO_ENABLE),
27 },
28 {
29 .type = IIO_EV_TYPE_THRESH,
30 .dir = IIO_EV_DIR_EITHER,
31 .mask_separate = BIT(IIO_EV_INFO_HYSTERESIS),
32 },
33 };
34
35 #define AD7091R_CHANNEL(idx, bits, ev, num_ev) { \
36 .type = IIO_VOLTAGE, \
37 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
38 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
39 .indexed = 1, \
40 .channel = idx, \
41 .event_spec = ev, \
42 .num_event_specs = num_ev, \
43 .scan_type.storagebits = 16, \
44 .scan_type.realbits = bits, \
45 }
46 static const struct iio_chan_spec ad7091r5_channels_irq[] = {
47 AD7091R_CHANNEL(0, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
48 AD7091R_CHANNEL(1, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
49 AD7091R_CHANNEL(2, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
50 AD7091R_CHANNEL(3, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
51 };
52
53 static const struct iio_chan_spec ad7091r5_channels_noirq[] = {
54 AD7091R_CHANNEL(0, 12, NULL, 0),
55 AD7091R_CHANNEL(1, 12, NULL, 0),
56 AD7091R_CHANNEL(2, 12, NULL, 0),
57 AD7091R_CHANNEL(3, 12, NULL, 0),
58 };
59
60 static const struct ad7091r_chip_info ad7091r5_chip_info_irq = {
61 .channels = ad7091r5_channels_irq,
62 .num_channels = ARRAY_SIZE(ad7091r5_channels_irq),
63 .vref_mV = 2500,
64 };
65
66 static const struct ad7091r_chip_info ad7091r5_chip_info_noirq = {
67 .channels = ad7091r5_channels_noirq,
68 .num_channels = ARRAY_SIZE(ad7091r5_channels_noirq),
69 .vref_mV = 2500,
70 };
71
ad7091r5_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)72 static int ad7091r5_i2c_probe(struct i2c_client *i2c,
73 const struct i2c_device_id *id)
74 {
75 const struct ad7091r_chip_info *chip_info;
76 struct regmap *map = devm_regmap_init_i2c(i2c, &ad7091r_regmap_config);
77
78 if (IS_ERR(map))
79 return PTR_ERR(map);
80
81 if (i2c->irq)
82 chip_info = &ad7091r5_chip_info_irq;
83 else
84 chip_info = &ad7091r5_chip_info_noirq;
85
86 return ad7091r_probe(&i2c->dev, id->name, chip_info, map, i2c->irq);
87 }
88
89 static const struct of_device_id ad7091r5_dt_ids[] = {
90 { .compatible = "adi,ad7091r5" },
91 {},
92 };
93 MODULE_DEVICE_TABLE(of, ad7091r5_dt_ids);
94
95 static const struct i2c_device_id ad7091r5_i2c_ids[] = {
96 {"ad7091r5", 0},
97 {}
98 };
99 MODULE_DEVICE_TABLE(i2c, ad7091r5_i2c_ids);
100
101 static struct i2c_driver ad7091r5_driver = {
102 .driver = {
103 .name = "ad7091r5",
104 .of_match_table = ad7091r5_dt_ids,
105 },
106 .probe = ad7091r5_i2c_probe,
107 .id_table = ad7091r5_i2c_ids,
108 };
109 module_i2c_driver(ad7091r5_driver);
110
111 MODULE_AUTHOR("Beniamin Bia <beniamin.bia@analog.com>");
112 MODULE_DESCRIPTION("Analog Devices AD7091R5 multi-channel ADC driver");
113 MODULE_LICENSE("GPL v2");
114