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/of_device.h>
14#include <linux/regmap.h>
15
16#include <linux/mfd/madera/core.h>
17
18#include "madera.h"
19
20static int madera_i2c_probe(struct i2c_client *i2c,
21			    const struct i2c_device_id *id)
22{
23	struct madera *madera;
24	const struct regmap_config *regmap_16bit_config = NULL;
25	const struct regmap_config *regmap_32bit_config = NULL;
26	const void *of_data;
27	unsigned long type;
28	const char *name;
29	int ret;
30
31	of_data = of_device_get_match_data(&i2c->dev);
32	if (of_data)
33		type = (unsigned long)of_data;
34	else
35		type = id->driver_data;
36
37	switch (type) {
38	case CS47L15:
39		if (IS_ENABLED(CONFIG_MFD_CS47L15)) {
40			regmap_16bit_config = &cs47l15_16bit_i2c_regmap;
41			regmap_32bit_config = &cs47l15_32bit_i2c_regmap;
42		}
43		break;
44	case CS47L35:
45		if (IS_ENABLED(CONFIG_MFD_CS47L35)) {
46			regmap_16bit_config = &cs47l35_16bit_i2c_regmap;
47			regmap_32bit_config = &cs47l35_32bit_i2c_regmap;
48		}
49		break;
50	case CS47L85:
51	case WM1840:
52		if (IS_ENABLED(CONFIG_MFD_CS47L85)) {
53			regmap_16bit_config = &cs47l85_16bit_i2c_regmap;
54			regmap_32bit_config = &cs47l85_32bit_i2c_regmap;
55		}
56		break;
57	case CS47L90:
58	case CS47L91:
59		if (IS_ENABLED(CONFIG_MFD_CS47L90)) {
60			regmap_16bit_config = &cs47l90_16bit_i2c_regmap;
61			regmap_32bit_config = &cs47l90_32bit_i2c_regmap;
62		}
63		break;
64	case CS42L92:
65	case CS47L92:
66	case CS47L93:
67		if (IS_ENABLED(CONFIG_MFD_CS47L92)) {
68			regmap_16bit_config = &cs47l92_16bit_i2c_regmap;
69			regmap_32bit_config = &cs47l92_32bit_i2c_regmap;
70		}
71		break;
72	default:
73		dev_err(&i2c->dev,
74			"Unknown Madera I2C device type %ld\n", type);
75		return -EINVAL;
76	}
77
78	name = madera_name_from_type(type);
79
80	if (!regmap_16bit_config) {
81		/* it's polite to say which codec isn't built into the kernel */
82		dev_err(&i2c->dev,
83			"Kernel does not include support for %s\n", name);
84		return -EINVAL;
85	}
86
87	madera = devm_kzalloc(&i2c->dev, sizeof(*madera), GFP_KERNEL);
88	if (!madera)
89		return -ENOMEM;
90
91	madera->regmap = devm_regmap_init_i2c(i2c, regmap_16bit_config);
92	if (IS_ERR(madera->regmap)) {
93		ret = PTR_ERR(madera->regmap);
94		dev_err(&i2c->dev,
95			"Failed to allocate 16-bit register map: %d\n",	ret);
96		return ret;
97	}
98
99	madera->regmap_32bit = devm_regmap_init_i2c(i2c, regmap_32bit_config);
100	if (IS_ERR(madera->regmap_32bit)) {
101		ret = PTR_ERR(madera->regmap_32bit);
102		dev_err(&i2c->dev,
103			"Failed to allocate 32-bit register map: %d\n", ret);
104		return ret;
105	}
106
107	madera->type = type;
108	madera->type_name = name;
109	madera->dev = &i2c->dev;
110	madera->irq = i2c->irq;
111
112	return madera_dev_init(madera);
113}
114
115static int madera_i2c_remove(struct i2c_client *i2c)
116{
117	struct madera *madera = dev_get_drvdata(&i2c->dev);
118
119	madera_dev_exit(madera);
120
121	return 0;
122}
123
124static const struct i2c_device_id madera_i2c_id[] = {
125	{ "cs47l15", CS47L15 },
126	{ "cs47l35", CS47L35 },
127	{ "cs47l85", CS47L85 },
128	{ "cs47l90", CS47L90 },
129	{ "cs47l91", CS47L91 },
130	{ "cs42l92", CS42L92 },
131	{ "cs47l92", CS47L92 },
132	{ "cs47l93", CS47L93 },
133	{ "wm1840", WM1840 },
134	{ }
135};
136MODULE_DEVICE_TABLE(i2c, madera_i2c_id);
137
138static struct i2c_driver madera_i2c_driver = {
139	.driver = {
140		.name	= "madera",
141		.pm	= &madera_pm_ops,
142		.of_match_table	= of_match_ptr(madera_of_match),
143	},
144	.probe		= madera_i2c_probe,
145	.remove		= madera_i2c_remove,
146	.id_table	= madera_i2c_id,
147};
148
149module_i2c_driver(madera_i2c_driver);
150
151MODULE_DESCRIPTION("Madera I2C bus interface");
152MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
153MODULE_LICENSE("GPL v2");
154