GNU Linux-libre 5.10.219-gnu1
[releases.git] / drivers / mfd / madera-i2c.c
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
20 static 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
115 static 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
124 static 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 };
136 MODULE_DEVICE_TABLE(i2c, madera_i2c_id);
137
138 static 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
149 module_i2c_driver(madera_i2c_driver);
150
151 MODULE_DESCRIPTION("Madera I2C bus interface");
152 MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
153 MODULE_LICENSE("GPL v2");