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16b27467 RF |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * SPI bus interface to Cirrus Logic Madera codecs | |
4 | * | |
5 | * Copyright (C) 2015-2018 Cirrus Logic | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; version 2. | |
10 | */ | |
11 | ||
12 | #include <linux/device.h> | |
13 | #include <linux/err.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/of.h> | |
16 | #include <linux/of_device.h> | |
17 | #include <linux/regmap.h> | |
18 | #include <linux/spi/spi.h> | |
19 | ||
20 | #include <linux/mfd/madera/core.h> | |
21 | ||
22 | #include "madera.h" | |
23 | ||
24 | static int madera_spi_probe(struct spi_device *spi) | |
25 | { | |
26 | const struct spi_device_id *id = spi_get_device_id(spi); | |
27 | struct madera *madera; | |
28 | const struct regmap_config *regmap_16bit_config = NULL; | |
29 | const struct regmap_config *regmap_32bit_config = NULL; | |
30 | const void *of_data; | |
31 | unsigned long type; | |
32 | const char *name; | |
33 | int ret; | |
34 | ||
35 | of_data = of_device_get_match_data(&spi->dev); | |
36 | if (of_data) | |
37 | type = (unsigned long)of_data; | |
38 | else | |
39 | type = id->driver_data; | |
40 | ||
41 | switch (type) { | |
42 | case CS47L35: | |
43 | if (IS_ENABLED(CONFIG_MFD_CS47L35)) { | |
44 | regmap_16bit_config = &cs47l35_16bit_spi_regmap; | |
45 | regmap_32bit_config = &cs47l35_32bit_spi_regmap; | |
46 | } | |
47 | break; | |
48 | case CS47L85: | |
49 | case WM1840: | |
50 | if (IS_ENABLED(CONFIG_MFD_CS47L85)) { | |
51 | regmap_16bit_config = &cs47l85_16bit_spi_regmap; | |
52 | regmap_32bit_config = &cs47l85_32bit_spi_regmap; | |
53 | } | |
54 | break; | |
55 | case CS47L90: | |
56 | case CS47L91: | |
57 | if (IS_ENABLED(CONFIG_MFD_CS47L90)) { | |
58 | regmap_16bit_config = &cs47l90_16bit_spi_regmap; | |
59 | regmap_32bit_config = &cs47l90_32bit_spi_regmap; | |
60 | } | |
61 | break; | |
62 | default: | |
63 | dev_err(&spi->dev, | |
64 | "Unknown Madera SPI device type %ld\n", type); | |
65 | return -EINVAL; | |
66 | } | |
67 | ||
68 | name = madera_name_from_type(type); | |
69 | ||
70 | if (!regmap_16bit_config) { | |
71 | /* it's polite to say which codec isn't built into the kernel */ | |
72 | dev_err(&spi->dev, | |
73 | "Kernel does not include support for %s\n", name); | |
74 | return -EINVAL; | |
75 | } | |
76 | ||
77 | madera = devm_kzalloc(&spi->dev, sizeof(*madera), GFP_KERNEL); | |
78 | if (!madera) | |
79 | return -ENOMEM; | |
80 | ||
81 | madera->regmap = devm_regmap_init_spi(spi, regmap_16bit_config); | |
82 | if (IS_ERR(madera->regmap)) { | |
83 | ret = PTR_ERR(madera->regmap); | |
84 | dev_err(&spi->dev, | |
85 | "Failed to allocate 16-bit register map: %d\n", ret); | |
86 | return ret; | |
87 | } | |
88 | ||
89 | madera->regmap_32bit = devm_regmap_init_spi(spi, regmap_32bit_config); | |
90 | if (IS_ERR(madera->regmap_32bit)) { | |
91 | ret = PTR_ERR(madera->regmap_32bit); | |
92 | dev_err(&spi->dev, | |
93 | "Failed to allocate 32-bit register map: %d\n", ret); | |
94 | return ret; | |
95 | } | |
96 | ||
97 | madera->type = type; | |
98 | madera->type_name = name; | |
99 | madera->dev = &spi->dev; | |
100 | madera->irq = spi->irq; | |
101 | ||
102 | return madera_dev_init(madera); | |
103 | } | |
104 | ||
105 | static int madera_spi_remove(struct spi_device *spi) | |
106 | { | |
107 | struct madera *madera = spi_get_drvdata(spi); | |
108 | ||
109 | madera_dev_exit(madera); | |
110 | ||
111 | return 0; | |
112 | } | |
113 | ||
114 | static const struct spi_device_id madera_spi_ids[] = { | |
115 | { "cs47l35", CS47L35 }, | |
116 | { "cs47l85", CS47L85 }, | |
117 | { "cs47l90", CS47L90 }, | |
118 | { "cs47l91", CS47L91 }, | |
119 | { "wm1840", WM1840 }, | |
120 | { } | |
121 | }; | |
122 | MODULE_DEVICE_TABLE(spi, madera_spi_ids); | |
123 | ||
124 | static struct spi_driver madera_spi_driver = { | |
125 | .driver = { | |
126 | .name = "madera", | |
127 | .pm = &madera_pm_ops, | |
128 | .of_match_table = of_match_ptr(madera_of_match), | |
129 | }, | |
130 | .probe = madera_spi_probe, | |
131 | .remove = madera_spi_remove, | |
132 | .id_table = madera_spi_ids, | |
133 | }; | |
134 | ||
135 | module_spi_driver(madera_spi_driver); | |
136 | ||
137 | MODULE_DESCRIPTION("Madera SPI bus interface"); | |
138 | MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>"); | |
139 | MODULE_LICENSE("GPL v2"); |