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_chan_spec ad7091r5_channels_irq[] = { |
16 | AD7091R_CHANNEL(0, 12, ad7091r_events, ARRAY_SIZE(ad7091r_events)), |
17 | AD7091R_CHANNEL(1, 12, ad7091r_events, ARRAY_SIZE(ad7091r_events)), |
18 | AD7091R_CHANNEL(2, 12, ad7091r_events, ARRAY_SIZE(ad7091r_events)), |
19 | AD7091R_CHANNEL(3, 12, ad7091r_events, ARRAY_SIZE(ad7091r_events)), |
20 | }; |
21 | |
22 | static const struct iio_chan_spec ad7091r5_channels_noirq[] = { |
23 | AD7091R_CHANNEL(0, 12, NULL, 0), |
24 | AD7091R_CHANNEL(1, 12, NULL, 0), |
25 | AD7091R_CHANNEL(2, 12, NULL, 0), |
26 | AD7091R_CHANNEL(3, 12, NULL, 0), |
27 | }; |
28 | |
29 | static int ad7091r5_set_mode(struct ad7091r_state *st, enum ad7091r_mode mode) |
30 | { |
31 | int ret, conf; |
32 | |
33 | switch (mode) { |
34 | case AD7091R_MODE_SAMPLE: |
35 | conf = 0; |
36 | break; |
37 | case AD7091R_MODE_COMMAND: |
38 | conf = AD7091R_REG_CONF_CMD; |
39 | break; |
40 | case AD7091R_MODE_AUTOCYCLE: |
41 | conf = AD7091R_REG_CONF_AUTO; |
42 | break; |
43 | default: |
44 | return -EINVAL; |
45 | } |
46 | |
47 | ret = regmap_update_bits(map: st->map, AD7091R_REG_CONF, |
48 | AD7091R_REG_CONF_MODE_MASK, val: conf); |
49 | if (ret) |
50 | return ret; |
51 | |
52 | st->mode = mode; |
53 | |
54 | return 0; |
55 | } |
56 | |
57 | static unsigned int ad7091r5_reg_result_chan_id(unsigned int val) |
58 | { |
59 | return AD7091R5_REG_RESULT_CH_ID(val); |
60 | } |
61 | |
62 | static const struct ad7091r_chip_info ad7091r5_chip_info_irq = { |
63 | .name = "ad7091r-5" , |
64 | .channels = ad7091r5_channels_irq, |
65 | .num_channels = ARRAY_SIZE(ad7091r5_channels_irq), |
66 | .vref_mV = 2500, |
67 | .reg_result_chan_id = &ad7091r5_reg_result_chan_id, |
68 | .set_mode = &ad7091r5_set_mode, |
69 | }; |
70 | |
71 | static const struct ad7091r_chip_info ad7091r5_chip_info_noirq = { |
72 | .name = "ad7091r-5" , |
73 | .channels = ad7091r5_channels_noirq, |
74 | .num_channels = ARRAY_SIZE(ad7091r5_channels_noirq), |
75 | .vref_mV = 2500, |
76 | .reg_result_chan_id = &ad7091r5_reg_result_chan_id, |
77 | .set_mode = &ad7091r5_set_mode, |
78 | }; |
79 | |
80 | static const struct regmap_config ad7091r_regmap_config = { |
81 | .reg_bits = 8, |
82 | .val_bits = 16, |
83 | .writeable_reg = ad7091r_writeable_reg, |
84 | .volatile_reg = ad7091r_volatile_reg, |
85 | }; |
86 | |
87 | static void ad7091r5_regmap_init(struct ad7091r_state *st, |
88 | const struct regmap_config *regmap_conf) |
89 | { |
90 | struct i2c_client *i2c = container_of(st->dev, struct i2c_client, dev); |
91 | |
92 | st->map = devm_regmap_init_i2c(i2c, regmap_conf); |
93 | } |
94 | |
95 | static struct ad7091r_init_info ad7091r5_init_info = { |
96 | .info_irq = &ad7091r5_chip_info_irq, |
97 | .info_no_irq = &ad7091r5_chip_info_noirq, |
98 | .regmap_config = &ad7091r_regmap_config, |
99 | .init_adc_regmap = &ad7091r5_regmap_init |
100 | }; |
101 | |
102 | static int ad7091r5_i2c_probe(struct i2c_client *i2c) |
103 | { |
104 | const struct ad7091r_init_info *init_info; |
105 | |
106 | init_info = i2c_get_match_data(client: i2c); |
107 | if (!init_info) |
108 | return -EINVAL; |
109 | |
110 | return ad7091r_probe(dev: &i2c->dev, init_info, irq: i2c->irq); |
111 | } |
112 | |
113 | static const struct of_device_id ad7091r5_dt_ids[] = { |
114 | { .compatible = "adi,ad7091r5" , .data = &ad7091r5_init_info }, |
115 | {}, |
116 | }; |
117 | MODULE_DEVICE_TABLE(of, ad7091r5_dt_ids); |
118 | |
119 | static const struct i2c_device_id ad7091r5_i2c_ids[] = { |
120 | {"ad7091r5" , (kernel_ulong_t)&ad7091r5_init_info }, |
121 | {} |
122 | }; |
123 | MODULE_DEVICE_TABLE(i2c, ad7091r5_i2c_ids); |
124 | |
125 | static struct i2c_driver ad7091r5_driver = { |
126 | .driver = { |
127 | .name = "ad7091r5" , |
128 | .of_match_table = ad7091r5_dt_ids, |
129 | }, |
130 | .probe = ad7091r5_i2c_probe, |
131 | .id_table = ad7091r5_i2c_ids, |
132 | }; |
133 | module_i2c_driver(ad7091r5_driver); |
134 | |
135 | MODULE_AUTHOR("Beniamin Bia <beniamin.bia@analog.com>" ); |
136 | MODULE_DESCRIPTION("Analog Devices AD7091R5 multi-channel ADC driver" ); |
137 | MODULE_LICENSE("GPL v2" ); |
138 | MODULE_IMPORT_NS(IIO_AD7091R); |
139 | |