drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c

Source file repositories/reference/linux-study-clean/drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c

File Facts

System
Linux kernel
Corpus path
drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c
Extension
.c
Size
4219 bytes
Lines
187
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
/*
* Copyright (C) 2015 Intel Corporation Inc.
*/
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/property.h>
#include <linux/spi/spi.h>
#include <linux/regmap.h>
#include <linux/iio/iio.h>
#include "inv_mpu_iio.h"

static const struct regmap_config inv_mpu_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
};

static int inv_mpu_i2c_disable(struct iio_dev *indio_dev)
{
	struct inv_mpu6050_state *st = iio_priv(indio_dev);
	int ret = 0;

	if (st->reg->i2c_if) {
		ret = regmap_write(st->map, st->reg->i2c_if,
				   INV_ICM20602_BIT_I2C_IF_DIS);
	} else {
		st->chip_config.user_ctrl |= INV_MPU6050_BIT_I2C_IF_DIS;
		ret = regmap_write(st->map, st->reg->user_ctrl,
				   st->chip_config.user_ctrl);
	}

	return ret;
}

static int inv_mpu_probe(struct spi_device *spi)
{
	const void *match;
	struct regmap *regmap;
	const struct spi_device_id *spi_id;
	const char *name = NULL;
	enum inv_devices chip_type;

	if ((spi_id = spi_get_device_id(spi))) {
		chip_type = (enum inv_devices)spi_id->driver_data;
		name = spi_id->name;
	} else if ((match = device_get_match_data(&spi->dev))) {
		chip_type = (uintptr_t)match;
		name = dev_name(&spi->dev);
	} else {
		return -ENODEV;
	}

	regmap = devm_regmap_init_spi(spi, &inv_mpu_regmap_config);
	if (IS_ERR(regmap)) {
		dev_err(&spi->dev, "Failed to register spi regmap: %pe\n",
			regmap);
		return PTR_ERR(regmap);
	}

	return inv_mpu_core_probe(regmap, spi->irq, name,
				  inv_mpu_i2c_disable, chip_type);
}

/*
 * device id table is used to identify what device can be
 * supported by this driver
 */
static const struct spi_device_id inv_mpu_id[] = {
	{"mpu6000", INV_MPU6000},
	{"mpu6500", INV_MPU6500},
	{"mpu6515", INV_MPU6515},
	{"mpu6880", INV_MPU6880},
	{"mpu9250", INV_MPU9250},
	{"mpu9255", INV_MPU9255},
	{"icm20608", INV_ICM20608},
	{"icm20608d", INV_ICM20608D},
	{"icm20609", INV_ICM20609},
	{"icm20689", INV_ICM20689},
	{"icm20600", INV_ICM20600},
	{"icm20602", INV_ICM20602},
	{"icm20690", INV_ICM20690},
	{"iam20380", INV_IAM20380},
	{"iam20680", INV_IAM20680},
	{"iam20680hp", INV_IAM20680HP},
	{"iam20680ht", INV_IAM20680HT},
	{ }
};

MODULE_DEVICE_TABLE(spi, inv_mpu_id);

Annotation

Implementation Notes