drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_i2c.c

Source file repositories/reference/linux-study-clean/drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_i2c.c

File Facts

System
Linux kernel
Corpus path
drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_i2c.c
Extension
.c
Size
2322 bytes
Lines
95
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-only
/*
 * STMicroelectronics LSM9DS0 IMU driver
 *
 * Copyright (C) 2021, Intel Corporation
 *
 * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
 */

#include <linux/device/devres.h>
#include <linux/err.h>
#include <linux/gfp_types.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/regmap.h>

#include <linux/iio/common/st_sensors_i2c.h>

#include "st_lsm9ds0.h"

static const struct of_device_id st_lsm9ds0_of_match[] = {
	{
		.compatible = "st,lsm303d-imu",
		.data = LSM303D_IMU_DEV_NAME,
	},
	{
		.compatible = "st,lsm9ds0-imu",
		.data = LSM9DS0_IMU_DEV_NAME,
	},
	{ }
};
MODULE_DEVICE_TABLE(of, st_lsm9ds0_of_match);

static const struct i2c_device_id st_lsm9ds0_id_table[] = {
	{ LSM303D_IMU_DEV_NAME },
	{ LSM9DS0_IMU_DEV_NAME },
	{ }
};
MODULE_DEVICE_TABLE(i2c, st_lsm9ds0_id_table);

static const struct acpi_device_id st_lsm9ds0_acpi_match[] = {
	{"ACCL0001", (kernel_ulong_t)LSM303D_IMU_DEV_NAME},
	{ }
};
MODULE_DEVICE_TABLE(acpi, st_lsm9ds0_acpi_match);

static const struct regmap_config st_lsm9ds0_regmap_config = {
	.reg_bits	= 8,
	.val_bits	= 8,
	.read_flag_mask	= 0x80,
};

static int st_lsm9ds0_i2c_probe(struct i2c_client *client)
{
	const struct regmap_config *config = &st_lsm9ds0_regmap_config;
	struct device *dev = &client->dev;
	struct st_lsm9ds0 *lsm9ds0;
	struct regmap *regmap;

	st_sensors_dev_name_probe(dev, client->name, sizeof(client->name));

	lsm9ds0 = devm_kzalloc(dev, sizeof(*lsm9ds0), GFP_KERNEL);
	if (!lsm9ds0)
		return -ENOMEM;

	lsm9ds0->dev = dev;
	lsm9ds0->name = client->name;
	lsm9ds0->irq = client->irq;

	regmap = devm_regmap_init_i2c(client, config);
	if (IS_ERR(regmap))
		return PTR_ERR(regmap);

	i2c_set_clientdata(client, lsm9ds0);

	return st_lsm9ds0_probe(lsm9ds0, regmap);
}

static struct i2c_driver st_lsm9ds0_driver = {
	.driver = {
		.name = "st-lsm9ds0-i2c",
		.of_match_table = st_lsm9ds0_of_match,
		.acpi_match_table = st_lsm9ds0_acpi_match,
	},
	.probe = st_lsm9ds0_i2c_probe,
	.id_table = st_lsm9ds0_id_table,
};
module_i2c_driver(st_lsm9ds0_driver);

Annotation

Implementation Notes