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 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
madera_i2c_remove(struct i2c_client * i2c)107 static 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
114 static 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 };
126 MODULE_DEVICE_TABLE(i2c, madera_i2c_id);
127
128 static 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
139 module_i2c_driver(madera_i2c_driver);
140
141 MODULE_DESCRIPTION("Madera I2C bus interface");
142 MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
143 MODULE_LICENSE("GPL v2");
144