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
madera_i2c_probe(struct i2c_client * i2c)19 static 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
madera_i2c_remove(struct i2c_client * i2c)114 static 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
121 static 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 };
133 MODULE_DEVICE_TABLE(i2c, madera_i2c_id);
134
135 static 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
146 module_i2c_driver(madera_i2c_driver);
147
148 MODULE_DESCRIPTION("Madera I2C bus interface");
149 MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
150 MODULE_LICENSE("GPL v2");
151