mirror of
https://github.com/torvalds/linux.git
synced 2024-11-27 14:41:39 +00:00
260442cc5b
The scale can now be obtained with the "in_voltage_scale" file. By default, the scale returned corresponds to the internal VREF of 2.5V. It is possible to use an external VREF (through the REFIN/REFOUT pin of the chip), by passing a regulator to the driver. The scale will then be calculated according to the voltage reported by the regulator. Signed-off-by: Paul Cercueil <paul.cercueil@analog.com> Co-developed-by: Beniamin Bia <beniamin.bia@analog.com> Signed-off-by: Beniamin Bia <beniamin.bia@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
114 lines
3.0 KiB
C
114 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* AD7091R5 Analog to Digital converter driver
|
|
*
|
|
* Copyright 2014-2019 Analog Devices Inc.
|
|
*/
|
|
|
|
#include <linux/i2c.h>
|
|
#include <linux/iio/iio.h>
|
|
#include <linux/module.h>
|
|
#include <linux/regmap.h>
|
|
|
|
#include "ad7091r-base.h"
|
|
|
|
static const struct iio_event_spec ad7091r5_events[] = {
|
|
{
|
|
.type = IIO_EV_TYPE_THRESH,
|
|
.dir = IIO_EV_DIR_RISING,
|
|
.mask_separate = BIT(IIO_EV_INFO_VALUE) |
|
|
BIT(IIO_EV_INFO_ENABLE),
|
|
},
|
|
{
|
|
.type = IIO_EV_TYPE_THRESH,
|
|
.dir = IIO_EV_DIR_FALLING,
|
|
.mask_separate = BIT(IIO_EV_INFO_VALUE) |
|
|
BIT(IIO_EV_INFO_ENABLE),
|
|
},
|
|
{
|
|
.type = IIO_EV_TYPE_THRESH,
|
|
.dir = IIO_EV_DIR_EITHER,
|
|
.mask_separate = BIT(IIO_EV_INFO_HYSTERESIS),
|
|
},
|
|
};
|
|
|
|
#define AD7091R_CHANNEL(idx, bits, ev, num_ev) { \
|
|
.type = IIO_VOLTAGE, \
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
|
|
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
|
|
.indexed = 1, \
|
|
.channel = idx, \
|
|
.event_spec = ev, \
|
|
.num_event_specs = num_ev, \
|
|
.scan_type.storagebits = 16, \
|
|
.scan_type.realbits = bits, \
|
|
}
|
|
static const struct iio_chan_spec ad7091r5_channels_irq[] = {
|
|
AD7091R_CHANNEL(0, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
|
|
AD7091R_CHANNEL(1, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
|
|
AD7091R_CHANNEL(2, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
|
|
AD7091R_CHANNEL(3, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
|
|
};
|
|
|
|
static const struct iio_chan_spec ad7091r5_channels_noirq[] = {
|
|
AD7091R_CHANNEL(0, 12, NULL, 0),
|
|
AD7091R_CHANNEL(1, 12, NULL, 0),
|
|
AD7091R_CHANNEL(2, 12, NULL, 0),
|
|
AD7091R_CHANNEL(3, 12, NULL, 0),
|
|
};
|
|
|
|
static const struct ad7091r_chip_info ad7091r5_chip_info_irq = {
|
|
.channels = ad7091r5_channels_irq,
|
|
.num_channels = ARRAY_SIZE(ad7091r5_channels_irq),
|
|
.vref_mV = 2500,
|
|
};
|
|
|
|
static const struct ad7091r_chip_info ad7091r5_chip_info_noirq = {
|
|
.channels = ad7091r5_channels_noirq,
|
|
.num_channels = ARRAY_SIZE(ad7091r5_channels_noirq),
|
|
.vref_mV = 2500,
|
|
};
|
|
|
|
static int ad7091r5_i2c_probe(struct i2c_client *i2c,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
const struct ad7091r_chip_info *chip_info;
|
|
struct regmap *map = devm_regmap_init_i2c(i2c, &ad7091r_regmap_config);
|
|
|
|
if (IS_ERR(map))
|
|
return PTR_ERR(map);
|
|
|
|
if (i2c->irq)
|
|
chip_info = &ad7091r5_chip_info_irq;
|
|
else
|
|
chip_info = &ad7091r5_chip_info_noirq;
|
|
|
|
return ad7091r_probe(&i2c->dev, id->name, chip_info, map, i2c->irq);
|
|
}
|
|
|
|
static const struct of_device_id ad7091r5_dt_ids[] = {
|
|
{ .compatible = "adi,ad7091r5" },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, ad7091r5_dt_ids);
|
|
|
|
static const struct i2c_device_id ad7091r5_i2c_ids[] = {
|
|
{"ad7091r5", 0},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, ad7091r5_i2c_ids);
|
|
|
|
static struct i2c_driver ad7091r5_driver = {
|
|
.driver = {
|
|
.name = "ad7091r5",
|
|
.of_match_table = ad7091r5_dt_ids,
|
|
},
|
|
.probe = ad7091r5_i2c_probe,
|
|
.id_table = ad7091r5_i2c_ids,
|
|
};
|
|
module_i2c_driver(ad7091r5_driver);
|
|
|
|
MODULE_AUTHOR("Beniamin Bia <beniamin.bia@analog.com>");
|
|
MODULE_DESCRIPTION("Analog Devices AD7091R5 multi-channel ADC driver");
|
|
MODULE_LICENSE("GPL v2");
|