LXR linux/drivers/iio/adc/ad7091r5.c

   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
  15static 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}
  46static 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
  53static 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
  60static 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
  66static 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
  72static 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
  89static const struct of_device_id ad7091r5_dt_ids[] = {
  90        { .compatible = "adi,ad7091r5" },
  91        {},
  92};
  93MODULE_DEVICE_TABLE(of, ad7091r5_dt_ids);
  94
  95static const struct i2c_device_id ad7091r5_i2c_ids[] = {
  96        {"ad7091r5", 0},
  97        {}
  98};
  99MODULE_DEVICE_TABLE(i2c, ad7091r5_i2c_ids);
 100
 101static 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};
 109module_i2c_driver(ad7091r5_driver);
 110
 111MODULE_AUTHOR("Beniamin Bia <beniamin.bia@analog.com>");
 112MODULE_DESCRIPTION("Analog Devices AD7091R5 multi-channel ADC driver");
 113MODULE_LICENSE("GPL v2");
 114