cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ad7091r5.c (3064B)

      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");
    114MODULE_IMPORT_NS(IIO_AD7091R);