1
2
3
4
5
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
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
