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/regmap.h> |
13 | #include <linux/spi/spi.h> |
14 | |
15 | #include <linux/mfd/madera/core.h> |
16 | |
17 | #include "madera.h" |
18 | |
19 | static int madera_spi_probe(struct spi_device *spi) |
20 | { |
21 | const struct spi_device_id *id = spi_get_device_id(sdev: spi); |
22 | struct madera *madera; |
23 | const struct regmap_config *regmap_16bit_config = NULL; |
24 | const struct regmap_config *regmap_32bit_config = NULL; |
25 | const void *of_data; |
26 | unsigned long type; |
27 | const char *name; |
28 | int ret; |
29 | |
30 | of_data = of_device_get_match_data(dev: &spi->dev); |
31 | if (of_data) |
32 | type = (unsigned long)of_data; |
33 | else |
34 | type = id->driver_data; |
35 | |
36 | switch (type) { |
37 | case CS47L15: |
38 | if (IS_ENABLED(CONFIG_MFD_CS47L15)) { |
39 | regmap_16bit_config = &cs47l15_16bit_spi_regmap; |
40 | regmap_32bit_config = &cs47l15_32bit_spi_regmap; |
41 | } |
42 | break; |
43 | case CS47L35: |
44 | if (IS_ENABLED(CONFIG_MFD_CS47L35)) { |
45 | regmap_16bit_config = &cs47l35_16bit_spi_regmap; |
46 | regmap_32bit_config = &cs47l35_32bit_spi_regmap; |
47 | } |
48 | break; |
49 | case CS47L85: |
50 | case WM1840: |
51 | if (IS_ENABLED(CONFIG_MFD_CS47L85)) { |
52 | regmap_16bit_config = &cs47l85_16bit_spi_regmap; |
53 | regmap_32bit_config = &cs47l85_32bit_spi_regmap; |
54 | } |
55 | break; |
56 | case CS47L90: |
57 | case CS47L91: |
58 | if (IS_ENABLED(CONFIG_MFD_CS47L90)) { |
59 | regmap_16bit_config = &cs47l90_16bit_spi_regmap; |
60 | regmap_32bit_config = &cs47l90_32bit_spi_regmap; |
61 | } |
62 | break; |
63 | case CS42L92: |
64 | case CS47L92: |
65 | case CS47L93: |
66 | if (IS_ENABLED(CONFIG_MFD_CS47L92)) { |
67 | regmap_16bit_config = &cs47l92_16bit_spi_regmap; |
68 | regmap_32bit_config = &cs47l92_32bit_spi_regmap; |
69 | } |
70 | break; |
71 | default: |
72 | dev_err(&spi->dev, |
73 | "Unknown Madera SPI device type %ld\n" , type); |
74 | return -EINVAL; |
75 | } |
76 | |
77 | name = madera_name_from_type(type); |
78 | |
79 | if (!regmap_16bit_config) { |
80 | /* it's polite to say which codec isn't built into the kernel */ |
81 | dev_err(&spi->dev, |
82 | "Kernel does not include support for %s\n" , name); |
83 | return -EINVAL; |
84 | } |
85 | |
86 | madera = devm_kzalloc(dev: &spi->dev, size: sizeof(*madera), GFP_KERNEL); |
87 | if (!madera) |
88 | return -ENOMEM; |
89 | |
90 | madera->regmap = devm_regmap_init_spi(spi, regmap_16bit_config); |
91 | if (IS_ERR(ptr: madera->regmap)) { |
92 | ret = PTR_ERR(ptr: madera->regmap); |
93 | dev_err(&spi->dev, |
94 | "Failed to allocate 16-bit register map: %d\n" , ret); |
95 | return ret; |
96 | } |
97 | |
98 | madera->regmap_32bit = devm_regmap_init_spi(spi, regmap_32bit_config); |
99 | if (IS_ERR(ptr: madera->regmap_32bit)) { |
100 | ret = PTR_ERR(ptr: madera->regmap_32bit); |
101 | dev_err(&spi->dev, |
102 | "Failed to allocate 32-bit register map: %d\n" , ret); |
103 | return ret; |
104 | } |
105 | |
106 | madera->type = type; |
107 | madera->type_name = name; |
108 | madera->dev = &spi->dev; |
109 | madera->irq = spi->irq; |
110 | |
111 | return madera_dev_init(madera); |
112 | } |
113 | |
114 | static void madera_spi_remove(struct spi_device *spi) |
115 | { |
116 | struct madera *madera = spi_get_drvdata(spi); |
117 | |
118 | madera_dev_exit(madera); |
119 | } |
120 | |
121 | static const struct spi_device_id madera_spi_ids[] = { |
122 | { "cs47l15" , CS47L15 }, |
123 | { "cs47l35" , CS47L35 }, |
124 | { "cs47l85" , CS47L85 }, |
125 | { "cs47l90" , CS47L90 }, |
126 | { "cs47l91" , CS47L91 }, |
127 | { "cs42l92" , CS42L92 }, |
128 | { "cs47l92" , CS47L92 }, |
129 | { "cs47l93" , CS47L93 }, |
130 | { "wm1840" , WM1840 }, |
131 | { } |
132 | }; |
133 | MODULE_DEVICE_TABLE(spi, madera_spi_ids); |
134 | |
135 | static struct spi_driver madera_spi_driver = { |
136 | .driver = { |
137 | .name = "madera" , |
138 | .pm = &madera_pm_ops, |
139 | .of_match_table = of_match_ptr(madera_of_match), |
140 | }, |
141 | .probe = madera_spi_probe, |
142 | .remove = madera_spi_remove, |
143 | .id_table = madera_spi_ids, |
144 | }; |
145 | |
146 | module_spi_driver(madera_spi_driver); |
147 | |
148 | MODULE_DESCRIPTION("Madera SPI bus interface" ); |
149 | MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>" ); |
150 | MODULE_LICENSE("GPL v2" ); |
151 | |