drivers/iio/adc/ad7091r5.c

Source file repositories/reference/linux-study-clean/drivers/iio/adc/ad7091r5.c

File Facts

System
Linux kernel
Corpus path
drivers/iio/adc/ad7091r5.c
Extension
.c
Size
3600 bytes
Lines
139
Domain
Driver Families
Bucket
drivers/iio
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// 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_chan_spec ad7091r5_channels_irq[] = {
	AD7091R_CHANNEL(0, 12, ad7091r_events, ARRAY_SIZE(ad7091r_events)),
	AD7091R_CHANNEL(1, 12, ad7091r_events, ARRAY_SIZE(ad7091r_events)),
	AD7091R_CHANNEL(2, 12, ad7091r_events, ARRAY_SIZE(ad7091r_events)),
	AD7091R_CHANNEL(3, 12, ad7091r_events, ARRAY_SIZE(ad7091r_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 int ad7091r5_set_mode(struct ad7091r_state *st, enum ad7091r_mode mode)
{
	int ret, conf;

	switch (mode) {
	case AD7091R_MODE_SAMPLE:
		conf = 0;
		break;
	case AD7091R_MODE_COMMAND:
		conf = AD7091R_REG_CONF_CMD;
		break;
	case AD7091R_MODE_AUTOCYCLE:
		conf = AD7091R_REG_CONF_AUTO;
		break;
	default:
		return -EINVAL;
	}

	ret = regmap_update_bits(st->map, AD7091R_REG_CONF,
				 AD7091R_REG_CONF_MODE_MASK, conf);
	if (ret)
		return ret;

	st->mode = mode;

	return 0;
}

static unsigned int ad7091r5_reg_result_chan_id(unsigned int val)
{
	return AD7091R5_REG_RESULT_CH_ID(val);
}

static const struct ad7091r_chip_info ad7091r5_chip_info_irq = {
	.name = "ad7091r-5",
	.channels = ad7091r5_channels_irq,
	.num_channels = ARRAY_SIZE(ad7091r5_channels_irq),
	.vref_mV = 2500,
	.reg_result_chan_id = &ad7091r5_reg_result_chan_id,
	.set_mode = &ad7091r5_set_mode,
};

static const struct ad7091r_chip_info ad7091r5_chip_info_noirq = {
	.name = "ad7091r-5",
	.channels = ad7091r5_channels_noirq,
	.num_channels = ARRAY_SIZE(ad7091r5_channels_noirq),
	.vref_mV = 2500,
	.reg_result_chan_id = &ad7091r5_reg_result_chan_id,
	.set_mode = &ad7091r5_set_mode,
};

static const struct regmap_config ad7091r_regmap_config = {
	.reg_bits = 8,
	.val_bits = 16,
	.writeable_reg = ad7091r_writeable_reg,
	.volatile_reg = ad7091r_volatile_reg,
};

static void ad7091r5_regmap_init(struct ad7091r_state *st,
				 const struct regmap_config *regmap_conf)
{
	struct i2c_client *i2c = container_of(st->dev, struct i2c_client, dev);

Annotation

Implementation Notes