1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * CS42L43 I2C driver
 4 *
 5 * Copyright (C) 2022-2023 Cirrus Logic, Inc. and
 6 *                         Cirrus Logic International Semiconductor Ltd.
 7 */
 8
 9#include <linux/err.h>
10#include <linux/errno.h>
11#include <linux/i2c.h>
12#include <linux/mfd/cs42l43-regs.h>
13#include <linux/module.h>
14
15#include "cs42l43.h"
16
17static const struct regmap_config cs42l43_i2c_regmap = {
18	.reg_bits		= 32,
19	.reg_stride		= 4,
20	.val_bits		= 32,
21	.reg_format_endian	= REGMAP_ENDIAN_BIG,
22	.val_format_endian	= REGMAP_ENDIAN_BIG,
23
24	.max_register		= CS42L43_MCU_RAM_MAX,
25	.readable_reg		= cs42l43_readable_register,
26	.volatile_reg		= cs42l43_volatile_register,
27	.precious_reg		= cs42l43_precious_register,
28
29	.cache_type		= REGCACHE_MAPLE,
30	.reg_defaults		= cs42l43_reg_default,
31	.num_reg_defaults	= ARRAY_SIZE(cs42l43_reg_default),
32};
33
34static int cs42l43_i2c_probe(struct i2c_client *i2c)
35{
36	struct cs42l43 *cs42l43;
37	int ret;
38
39	cs42l43 = devm_kzalloc(&i2c->dev, sizeof(*cs42l43), GFP_KERNEL);
40	if (!cs42l43)
41		return -ENOMEM;
42
43	cs42l43->dev = &i2c->dev;
44	cs42l43->irq = i2c->irq;
45	/* A device on an I2C is always attached by definition. */
46	cs42l43->attached = true;
47
48	cs42l43->regmap = devm_regmap_init_i2c(i2c, &cs42l43_i2c_regmap);
49	if (IS_ERR(cs42l43->regmap)) {
50		ret = PTR_ERR(cs42l43->regmap);
51		dev_err(cs42l43->dev, "Failed to allocate regmap: %d\n", ret);
52		return ret;
53	}
54
55	return cs42l43_dev_probe(cs42l43);
56}
57
58static void cs42l43_i2c_remove(struct i2c_client *i2c)
59{
60	struct cs42l43 *cs42l43 = dev_get_drvdata(&i2c->dev);
61
62	cs42l43_dev_remove(cs42l43);
63}
64
65#if IS_ENABLED(CONFIG_OF)
66static const struct of_device_id cs42l43_of_match[] = {
67	{ .compatible = "cirrus,cs42l43", },
68	{}
69};
70MODULE_DEVICE_TABLE(of, cs42l43_of_match);
71#endif
72
73#if IS_ENABLED(CONFIG_ACPI)
74static const struct acpi_device_id cs42l43_acpi_match[] = {
75	{ "CSC4243", 0 },
76	{}
77};
78MODULE_DEVICE_TABLE(acpi, cs42l43_acpi_match);
79#endif
80
81static struct i2c_driver cs42l43_i2c_driver = {
82	.driver = {
83		.name			= "cs42l43",
84		.pm			= pm_ptr(&cs42l43_pm_ops),
85		.of_match_table		= of_match_ptr(cs42l43_of_match),
86		.acpi_match_table	= ACPI_PTR(cs42l43_acpi_match),
87	},
88
89	.probe		= cs42l43_i2c_probe,
90	.remove		= cs42l43_i2c_remove,
91};
92module_i2c_driver(cs42l43_i2c_driver);
93
94MODULE_IMPORT_NS(MFD_CS42L43);
95
96MODULE_DESCRIPTION("CS42L43 I2C Driver");
97MODULE_AUTHOR("Charles Keepax <ckeepax@opensource.cirrus.com>");
98MODULE_LICENSE("GPL");