sound/soc/codecs/cs530x-i2c.c

Source file repositories/reference/linux-study-clean/sound/soc/codecs/cs530x-i2c.c

File Facts

System
Linux kernel
Corpus path
sound/soc/codecs/cs530x-i2c.c
Extension
.c
Size
2254 bytes
Lines
89
Domain
Driver Families
Bucket
sound/soc
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
//
// CS530x CODEC driver
//
// Copyright (C) 2024-2025 Cirrus Logic, Inc. and
//                         Cirrus Logic International Semiconductor Ltd.

#include <linux/device.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/regmap.h>

#include "cs530x.h"

static const struct of_device_id cs530x_of_match[] = {
	{
		.compatible = "cirrus,cs4282",
		.data = (void *)CS4282,
	}, {
		.compatible = "cirrus,cs4302",
		.data = (void *)CS4302,
	}, {
		.compatible = "cirrus,cs4304",
		.data = (void *)CS4304,
	}, {
		.compatible = "cirrus,cs4308",
		.data = (void *)CS4308,
	}, {
		.compatible = "cirrus,cs5302",
		.data = (void *)CS5302,
	}, {
		.compatible = "cirrus,cs5304",
		.data = (void *)CS5304,
	}, {
		.compatible = "cirrus,cs5308",
		.data = (void *)CS5308,
	},
	{}
};
MODULE_DEVICE_TABLE(of, cs530x_of_match);

static const struct i2c_device_id cs530x_i2c_id[] = {
	{ .name = "cs4282", .driver_data = CS4282 },
	{ .name = "cs4302", .driver_data = CS4302 },
	{ .name = "cs4304", .driver_data = CS4304 },
	{ .name = "cs4308", .driver_data = CS4308 },
	{ .name = "cs5302", .driver_data = CS5302 },
	{ .name = "cs5304", .driver_data = CS5304 },
	{ .name = "cs5308", .driver_data = CS5308 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, cs530x_i2c_id);

static int cs530x_i2c_probe(struct i2c_client *client)
{
	struct cs530x_priv *cs530x;

	cs530x = devm_kzalloc(&client->dev, sizeof(*cs530x), GFP_KERNEL);
	if (!cs530x)
		return -ENOMEM;

	i2c_set_clientdata(client, cs530x);

	cs530x->regmap = devm_regmap_init_i2c(client, &cs530x_regmap_i2c);
	if (IS_ERR(cs530x->regmap))
		return dev_err_probe(&client->dev, PTR_ERR(cs530x->regmap),
				     "Failed to allocate register map\n");

	cs530x->devtype = (uintptr_t)i2c_get_match_data(client);
	cs530x->dev = &client->dev;

	return cs530x_probe(cs530x);
}

static struct i2c_driver cs530x_i2c_driver = {
	.driver = {
		.name = "cs530x",
		.of_match_table = cs530x_of_match,
	},
	.probe = cs530x_i2c_probe,
	.id_table = cs530x_i2c_id,
};
module_i2c_driver(cs530x_i2c_driver);

MODULE_DESCRIPTION("I2C CS530X driver");
MODULE_IMPORT_NS("SND_SOC_CS530X");
MODULE_AUTHOR("Paul Handrigan, Cirrus Logic Inc, <paulha@opensource.cirrus.com>");
MODULE_LICENSE("GPL");

Annotation

Implementation Notes