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 | |
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(client: 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(dev: &i2c->dev, size: 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(ptr: madera->regmap)) { |
85 | ret = PTR_ERR(ptr: 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(ptr: madera->regmap_32bit)) { |
93 | ret = PTR_ERR(ptr: 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 | |
107 | static void madera_i2c_remove(struct i2c_client *i2c) |
108 | { |
109 | struct madera *madera = dev_get_drvdata(dev: &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 | |