GNU Linux-libre 5.19-rc6-gnu
[releases.git] / drivers / mfd / madera-spi.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * SPI 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/module.h>
11 #include <linux/of.h>
12 #include <linux/of_device.h>
13 #include <linux/regmap.h>
14 #include <linux/spi/spi.h>
15
16 #include <linux/mfd/madera/core.h>
17
18 #include "madera.h"
19
20 static int madera_spi_probe(struct spi_device *spi)
21 {
22         const struct spi_device_id *id = spi_get_device_id(spi);
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(&spi->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_spi_regmap;
41                         regmap_32bit_config = &cs47l15_32bit_spi_regmap;
42                 }
43                 break;
44         case CS47L35:
45                 if (IS_ENABLED(CONFIG_MFD_CS47L35)) {
46                         regmap_16bit_config = &cs47l35_16bit_spi_regmap;
47                         regmap_32bit_config = &cs47l35_32bit_spi_regmap;
48                 }
49                 break;
50         case CS47L85:
51         case WM1840:
52                 if (IS_ENABLED(CONFIG_MFD_CS47L85)) {
53                         regmap_16bit_config = &cs47l85_16bit_spi_regmap;
54                         regmap_32bit_config = &cs47l85_32bit_spi_regmap;
55                 }
56                 break;
57         case CS47L90:
58         case CS47L91:
59                 if (IS_ENABLED(CONFIG_MFD_CS47L90)) {
60                         regmap_16bit_config = &cs47l90_16bit_spi_regmap;
61                         regmap_32bit_config = &cs47l90_32bit_spi_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_spi_regmap;
69                         regmap_32bit_config = &cs47l92_32bit_spi_regmap;
70                 }
71                 break;
72         default:
73                 dev_err(&spi->dev,
74                         "Unknown Madera SPI 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(&spi->dev,
83                         "Kernel does not include support for %s\n", name);
84                 return -EINVAL;
85         }
86
87         madera = devm_kzalloc(&spi->dev, sizeof(*madera), GFP_KERNEL);
88         if (!madera)
89                 return -ENOMEM;
90
91         madera->regmap = devm_regmap_init_spi(spi, regmap_16bit_config);
92         if (IS_ERR(madera->regmap)) {
93                 ret = PTR_ERR(madera->regmap);
94                 dev_err(&spi->dev,
95                         "Failed to allocate 16-bit register map: %d\n", ret);
96                 return ret;
97         }
98
99         madera->regmap_32bit = devm_regmap_init_spi(spi, regmap_32bit_config);
100         if (IS_ERR(madera->regmap_32bit)) {
101                 ret = PTR_ERR(madera->regmap_32bit);
102                 dev_err(&spi->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 = &spi->dev;
110         madera->irq = spi->irq;
111
112         return madera_dev_init(madera);
113 }
114
115 static void madera_spi_remove(struct spi_device *spi)
116 {
117         struct madera *madera = spi_get_drvdata(spi);
118
119         madera_dev_exit(madera);
120 }
121
122 static const struct spi_device_id madera_spi_ids[] = {
123         { "cs47l15", CS47L15 },
124         { "cs47l35", CS47L35 },
125         { "cs47l85", CS47L85 },
126         { "cs47l90", CS47L90 },
127         { "cs47l91", CS47L91 },
128         { "cs42l92", CS42L92 },
129         { "cs47l92", CS47L92 },
130         { "cs47l93", CS47L93 },
131         { "wm1840", WM1840 },
132         { }
133 };
134 MODULE_DEVICE_TABLE(spi, madera_spi_ids);
135
136 static struct spi_driver madera_spi_driver = {
137         .driver = {
138                 .name   = "madera",
139                 .pm     = &madera_pm_ops,
140                 .of_match_table = of_match_ptr(madera_of_match),
141         },
142         .probe          = madera_spi_probe,
143         .remove         = madera_spi_remove,
144         .id_table       = madera_spi_ids,
145 };
146
147 module_spi_driver(madera_spi_driver);
148
149 MODULE_DESCRIPTION("Madera SPI bus interface");
150 MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
151 MODULE_LICENSE("GPL v2");