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	const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
22	struct madera *madera;
23	const struct regmap_config *regmap_16bit_config = NULL;
24	const struct regmap_config *regmap_32bit_config = NULL;
25	const void *of_data;
26	unsigned long type;
27	const char *name;
28	int ret;
29
30	of_data = of_device_get_match_data(&i2c->dev);
31	if (of_data)
32		type = (unsigned long)of_data;
33	else
34		type = id->driver_data;
35
36	switch (type) {
37	case CS47L15:
38		if (IS_ENABLED(CONFIG_MFD_CS47L15)) {
39			regmap_16bit_config = &cs47l15_16bit_i2c_regmap;
40			regmap_32bit_config = &cs47l15_32bit_i2c_regmap;
41		}
42		break;
43	case CS47L35:
44		if (IS_ENABLED(CONFIG_MFD_CS47L35)) {
45			regmap_16bit_config = &cs47l35_16bit_i2c_regmap;
46			regmap_32bit_config = &cs47l35_32bit_i2c_regmap;
47		}
48		break;
49	case CS47L85:
50	case WM1840:
51		if (IS_ENABLED(CONFIG_MFD_CS47L85)) {
52			regmap_16bit_config = &cs47l85_16bit_i2c_regmap;
53			regmap_32bit_config = &cs47l85_32bit_i2c_regmap;
54		}
55		break;
56	case CS47L90:
57	case CS47L91:
58		if (IS_ENABLED(CONFIG_MFD_CS47L90)) {
59			regmap_16bit_config = &cs47l90_16bit_i2c_regmap;
60			regmap_32bit_config = &cs47l90_32bit_i2c_regmap;
61		}
62		break;
63	case CS42L92:
64	case CS47L92:
65	case CS47L93:
66		if (IS_ENABLED(CONFIG_MFD_CS47L92)) {
67			regmap_16bit_config = &cs47l92_16bit_i2c_regmap;
68			regmap_32bit_config = &cs47l92_32bit_i2c_regmap;
69		}
70		break;
71	default:
72		dev_err(&i2c->dev,
73			"Unknown Madera I2C device type %ld\n", type);
74		return -EINVAL;
75	}
76
77	name = madera_name_from_type(type);
78
79	if (!regmap_16bit_config) {
80		/* it's polite to say which codec isn't built into the kernel */
81		dev_err(&i2c->dev,
82			"Kernel does not include support for %s\n", name);
83		return -EINVAL;
84	}
85
86	madera = devm_kzalloc(&i2c->dev, sizeof(*madera), GFP_KERNEL);
87	if (!madera)
88		return -ENOMEM;
89
90	madera->regmap = devm_regmap_init_i2c(i2c, regmap_16bit_config);
91	if (IS_ERR(madera->regmap)) {
92		ret = PTR_ERR(madera->regmap);
93		dev_err(&i2c->dev,
94			"Failed to allocate 16-bit register map: %d\n",	ret);
95		return ret;
96	}
97
98	madera->regmap_32bit = devm_regmap_init_i2c(i2c, regmap_32bit_config);
99	if (IS_ERR(madera->regmap_32bit)) {
100		ret = PTR_ERR(madera->regmap_32bit);
101		dev_err(&i2c->dev,
102			"Failed to allocate 32-bit register map: %d\n", ret);
103		return ret;
104	}
105
106	madera->type = type;
107	madera->type_name = name;
108	madera->dev = &i2c->dev;
109	madera->irq = i2c->irq;
110
111	return madera_dev_init(madera);
112}
113
114static void madera_i2c_remove(struct i2c_client *i2c)
115{
116	struct madera *madera = dev_get_drvdata(&i2c->dev);
117
118	madera_dev_exit(madera);
119}
120
121static const struct i2c_device_id madera_i2c_id[] = {
122	{ "cs47l15", CS47L15 },
123	{ "cs47l35", CS47L35 },
124	{ "cs47l85", CS47L85 },
125	{ "cs47l90", CS47L90 },
126	{ "cs47l91", CS47L91 },
127	{ "cs42l92", CS42L92 },
128	{ "cs47l92", CS47L92 },
129	{ "cs47l93", CS47L93 },
130	{ "wm1840", WM1840 },
131	{ }
132};
133MODULE_DEVICE_TABLE(i2c, madera_i2c_id);
134
135static struct i2c_driver madera_i2c_driver = {
136	.driver = {
137		.name	= "madera",
138		.pm	= &madera_pm_ops,
139		.of_match_table	= of_match_ptr(madera_of_match),
140	},
141	.probe		= madera_i2c_probe,
142	.remove		= madera_i2c_remove,
143	.id_table	= madera_i2c_id,
144};
145
146module_i2c_driver(madera_i2c_driver);
147
148MODULE_DESCRIPTION("Madera I2C bus interface");
149MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
150MODULE_LICENSE("GPL v2");
151