Merge tag '5.2-rc-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6
[linux-2.6-microblaze.git] / drivers / mfd / madera-spi.c
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");