drivers/iio/pressure/abp2030pa_i2c.c

Source file repositories/reference/linux-study-clean/drivers/iio/pressure/abp2030pa_i2c.c

File Facts

System
Linux kernel
Corpus path
drivers/iio/pressure/abp2030pa_i2c.c
Extension
.c
Size
2023 bytes
Lines
91
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-or-later
/*
 * Honeywell ABP2 series pressure sensor driver
 *
 * Copyright (c) 2025 Petre Rodan <petre.rodan@subdimension.ro>
 */

#include <linux/device.h>
#include <linux/errno.h>
#include <linux/i2c.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/types.h>

#include "abp2030pa.h"

static int abp2_i2c_read(struct abp2_data *data, u8 unused, u8 nbytes)
{
	struct i2c_client *client = to_i2c_client(data->dev);
	int ret;

	if (nbytes > ABP2_MEASUREMENT_RD_SIZE)
		return -EOVERFLOW;

	ret = i2c_master_recv(client, data->rx_buf, nbytes);
	if (ret < 0)
		return ret;
	if (ret != nbytes)
		return -EIO;

	return 0;
}

static int abp2_i2c_write(struct abp2_data *data, u8 cmd, u8 nbytes)
{
	struct i2c_client *client = to_i2c_client(data->dev);
	int ret;

	if (nbytes > ABP2_MEASUREMENT_RD_SIZE)
		return -EOVERFLOW;

	data->tx_buf[0] = cmd;
	ret = i2c_master_send(client, data->tx_buf, nbytes);
	if (ret < 0)
		return ret;
	if (ret != nbytes)
		return -EIO;

	return 0;
}

static const struct abp2_ops abp2_i2c_ops = {
	.read = abp2_i2c_read,
	.write = abp2_i2c_write,
};

static int abp2_i2c_probe(struct i2c_client *client)
{
	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
		return -EOPNOTSUPP;

	return abp2_common_probe(&client->dev, &abp2_i2c_ops, client->irq);
}

static const struct of_device_id abp2_i2c_match[] = {
	{ .compatible = "honeywell,abp2030pa" },
	{ }
};
MODULE_DEVICE_TABLE(of, abp2_i2c_match);

static const struct i2c_device_id abp2_i2c_id[] = {
	{ "abp2030pa" },
	{ }
};
MODULE_DEVICE_TABLE(i2c, abp2_i2c_id);

static struct i2c_driver abp2_i2c_driver = {
	.driver = {
		.name = "abp2030pa",
		.of_match_table = abp2_i2c_match,
	},
	.probe = abp2_i2c_probe,
	.id_table = abp2_i2c_id,
};
module_i2c_driver(abp2_i2c_driver);

MODULE_AUTHOR("Petre Rodan <petre.rodan@subdimension.ro>");
MODULE_DESCRIPTION("Honeywell ABP2 pressure sensor i2c driver");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS("IIO_HONEYWELL_ABP2030PA");

Annotation

Implementation Notes