115 lines
3.0 KiB
C
115 lines
3.0 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* AD7091R5 Analog to Digital converter driver
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*
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* Copyright 2014-2019 Analog Devices Inc.
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*/
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#include <linux/i2c.h>
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#include <linux/iio/iio.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include "ad7091r-base.h"
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static const struct iio_event_spec ad7091r5_events[] = {
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{
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.type = IIO_EV_TYPE_THRESH,
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.dir = IIO_EV_DIR_RISING,
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.mask_separate = BIT(IIO_EV_INFO_VALUE) |
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BIT(IIO_EV_INFO_ENABLE),
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},
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{
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.type = IIO_EV_TYPE_THRESH,
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.dir = IIO_EV_DIR_FALLING,
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.mask_separate = BIT(IIO_EV_INFO_VALUE) |
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BIT(IIO_EV_INFO_ENABLE),
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},
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{
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.type = IIO_EV_TYPE_THRESH,
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.dir = IIO_EV_DIR_EITHER,
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.mask_separate = BIT(IIO_EV_INFO_HYSTERESIS),
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},
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};
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#define AD7091R_CHANNEL(idx, bits, ev, num_ev) { \
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.type = IIO_VOLTAGE, \
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
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.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
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.indexed = 1, \
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.channel = idx, \
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.event_spec = ev, \
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.num_event_specs = num_ev, \
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.scan_type.storagebits = 16, \
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.scan_type.realbits = bits, \
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}
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static const struct iio_chan_spec ad7091r5_channels_irq[] = {
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AD7091R_CHANNEL(0, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
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AD7091R_CHANNEL(1, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
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AD7091R_CHANNEL(2, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
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AD7091R_CHANNEL(3, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
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};
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static const struct iio_chan_spec ad7091r5_channels_noirq[] = {
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AD7091R_CHANNEL(0, 12, NULL, 0),
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AD7091R_CHANNEL(1, 12, NULL, 0),
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AD7091R_CHANNEL(2, 12, NULL, 0),
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AD7091R_CHANNEL(3, 12, NULL, 0),
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};
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static const struct ad7091r_chip_info ad7091r5_chip_info_irq = {
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.channels = ad7091r5_channels_irq,
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.num_channels = ARRAY_SIZE(ad7091r5_channels_irq),
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.vref_mV = 2500,
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};
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static const struct ad7091r_chip_info ad7091r5_chip_info_noirq = {
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.channels = ad7091r5_channels_noirq,
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.num_channels = ARRAY_SIZE(ad7091r5_channels_noirq),
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.vref_mV = 2500,
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};
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static int ad7091r5_i2c_probe(struct i2c_client *i2c)
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{
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const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
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const struct ad7091r_chip_info *chip_info;
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struct regmap *map = devm_regmap_init_i2c(i2c, &ad7091r_regmap_config);
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if (IS_ERR(map))
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return PTR_ERR(map);
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if (i2c->irq)
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chip_info = &ad7091r5_chip_info_irq;
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else
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chip_info = &ad7091r5_chip_info_noirq;
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return ad7091r_probe(&i2c->dev, id->name, chip_info, map, i2c->irq);
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}
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static const struct of_device_id ad7091r5_dt_ids[] = {
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{ .compatible = "adi,ad7091r5" },
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{},
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};
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MODULE_DEVICE_TABLE(of, ad7091r5_dt_ids);
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static const struct i2c_device_id ad7091r5_i2c_ids[] = {
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{"ad7091r5", 0},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, ad7091r5_i2c_ids);
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static struct i2c_driver ad7091r5_driver = {
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.driver = {
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.name = "ad7091r5",
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.of_match_table = ad7091r5_dt_ids,
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},
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.probe_new = ad7091r5_i2c_probe,
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.id_table = ad7091r5_i2c_ids,
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};
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module_i2c_driver(ad7091r5_driver);
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MODULE_AUTHOR("Beniamin Bia <beniamin.bia@analog.com>");
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MODULE_DESCRIPTION("Analog Devices AD7091R5 multi-channel ADC driver");
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MODULE_LICENSE("GPL v2");
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MODULE_IMPORT_NS(IIO_AD7091R);
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