1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * I2C bus interface to Cirrus Logic Madera codecs
4 *
5 * Copyright (C) 2015-2018 Cirrus Logic
6 */
7
8#include <linux/device.h>
9#include <linux/err.h>
10#include <linux/i2c.h>
11#include <linux/module.h>
12#include <linux/of.h>
13#include <linux/regmap.h>
14
15#include <linux/mfd/madera/core.h>
16
17#include "madera.h"
18
19static int madera_i2c_probe(struct i2c_client *i2c)
20{
21	struct madera *madera;
22	const struct regmap_config *regmap_16bit_config = NULL;
23	const struct regmap_config *regmap_32bit_config = NULL;
24	unsigned long type;
25	const char *name;
26	int ret;
27
28	type = (uintptr_t)i2c_get_match_data(i2c);
29	switch (type) {
30	case CS47L15:
31		if (IS_ENABLED(CONFIG_MFD_CS47L15)) {
32			regmap_16bit_config = &cs47l15_16bit_i2c_regmap;
33			regmap_32bit_config = &cs47l15_32bit_i2c_regmap;
34		}
35		break;
36	case CS47L35:
37		if (IS_ENABLED(CONFIG_MFD_CS47L35)) {
38			regmap_16bit_config = &cs47l35_16bit_i2c_regmap;
39			regmap_32bit_config = &cs47l35_32bit_i2c_regmap;
40		}
41		break;
42	case CS47L85:
43	case WM1840:
44		if (IS_ENABLED(CONFIG_MFD_CS47L85)) {
45			regmap_16bit_config = &cs47l85_16bit_i2c_regmap;
46			regmap_32bit_config = &cs47l85_32bit_i2c_regmap;
47		}
48		break;
49	case CS47L90:
50	case CS47L91:
51		if (IS_ENABLED(CONFIG_MFD_CS47L90)) {
52			regmap_16bit_config = &cs47l90_16bit_i2c_regmap;
53			regmap_32bit_config = &cs47l90_32bit_i2c_regmap;
54		}
55		break;
56	case CS42L92:
57	case CS47L92:
58	case CS47L93:
59		if (IS_ENABLED(CONFIG_MFD_CS47L92)) {
60			regmap_16bit_config = &cs47l92_16bit_i2c_regmap;
61			regmap_32bit_config = &cs47l92_32bit_i2c_regmap;
62		}
63		break;
64	default:
65		dev_err(&i2c->dev,
66			"Unknown Madera I2C device type %ld\n", type);
67		return -EINVAL;
68	}
69
70	name = madera_name_from_type(type);
71
72	if (!regmap_16bit_config) {
73		/* it's polite to say which codec isn't built into the kernel */
74		dev_err(&i2c->dev,
75			"Kernel does not include support for %s\n", name);
76		return -EINVAL;
77	}
78
79	madera = devm_kzalloc(&i2c->dev, sizeof(*madera), GFP_KERNEL);
80	if (!madera)
81		return -ENOMEM;
82
83	madera->regmap = devm_regmap_init_i2c(i2c, regmap_16bit_config);
84	if (IS_ERR(madera->regmap)) {
85		ret = PTR_ERR(madera->regmap);
86		dev_err(&i2c->dev,
87			"Failed to allocate 16-bit register map: %d\n",	ret);
88		return ret;
89	}
90
91	madera->regmap_32bit = devm_regmap_init_i2c(i2c, regmap_32bit_config);
92	if (IS_ERR(madera->regmap_32bit)) {
93		ret = PTR_ERR(madera->regmap_32bit);
94		dev_err(&i2c->dev,
95			"Failed to allocate 32-bit register map: %d\n", ret);
96		return ret;
97	}
98
99	madera->type = type;
100	madera->type_name = name;
101	madera->dev = &i2c->dev;
102	madera->irq = i2c->irq;
103
104	return madera_dev_init(madera);
105}
106
107static void madera_i2c_remove(struct i2c_client *i2c)
108{
109	struct madera *madera = dev_get_drvdata(&i2c->dev);
110
111	madera_dev_exit(madera);
112}
113
114static const struct i2c_device_id madera_i2c_id[] = {
115	{ "cs47l15", CS47L15 },
116	{ "cs47l35", CS47L35 },
117	{ "cs47l85", CS47L85 },
118	{ "cs47l90", CS47L90 },
119	{ "cs47l91", CS47L91 },
120	{ "cs42l92", CS42L92 },
121	{ "cs47l92", CS47L92 },
122	{ "cs47l93", CS47L93 },
123	{ "wm1840", WM1840 },
124	{ }
125};
126MODULE_DEVICE_TABLE(i2c, madera_i2c_id);
127
128static struct i2c_driver madera_i2c_driver = {
129	.driver = {
130		.name	= "madera",
131		.pm	= &madera_pm_ops,
132		.of_match_table	= of_match_ptr(madera_of_match),
133	},
134	.probe		= madera_i2c_probe,
135	.remove		= madera_i2c_remove,
136	.id_table	= madera_i2c_id,
137};
138
139module_i2c_driver(madera_i2c_driver);
140
141MODULE_DESCRIPTION("Madera I2C bus interface");
142MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
143MODULE_LICENSE("GPL v2");
144