Merge tag 'drm-misc-fixes-2023-10-12' of git://anongit.freedesktop.org/drm/drm-misc...
[platform/kernel/linux-starfive.git] / drivers / base / regmap / regmap-ac97.c
1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Register map access API - AC'97 support
4 //
5 // Copyright 2013 Linaro Ltd.  All rights reserved.
6
7 #include <linux/clk.h>
8 #include <linux/err.h>
9 #include <linux/init.h>
10 #include <linux/io.h>
11 #include <linux/module.h>
12 #include <linux/regmap.h>
13 #include <linux/slab.h>
14
15 #include <sound/ac97_codec.h>
16
17 bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg)
18 {
19         switch (reg) {
20         case AC97_RESET:
21         case AC97_POWERDOWN:
22         case AC97_INT_PAGING:
23         case AC97_EXTENDED_ID:
24         case AC97_EXTENDED_STATUS:
25         case AC97_EXTENDED_MID:
26         case AC97_EXTENDED_MSTATUS:
27         case AC97_GPIO_STATUS:
28         case AC97_MISC_AFE:
29         case AC97_VENDOR_ID1:
30         case AC97_VENDOR_ID2:
31         case AC97_CODEC_CLASS_REV:
32         case AC97_PCI_SVID:
33         case AC97_PCI_SID:
34         case AC97_FUNC_SELECT:
35         case AC97_FUNC_INFO:
36         case AC97_SENSE_INFO:
37                 return true;
38         default:
39                 return false;
40         }
41 }
42 EXPORT_SYMBOL_GPL(regmap_ac97_default_volatile);
43
44 static int regmap_ac97_reg_read(void *context, unsigned int reg,
45         unsigned int *val)
46 {
47         struct snd_ac97 *ac97 = context;
48
49         *val = ac97->bus->ops->read(ac97, reg);
50
51         return 0;
52 }
53
54 static int regmap_ac97_reg_write(void *context, unsigned int reg,
55         unsigned int val)
56 {
57         struct snd_ac97 *ac97 = context;
58
59         ac97->bus->ops->write(ac97, reg, val);
60
61         return 0;
62 }
63
64 static const struct regmap_bus ac97_regmap_bus = {
65         .reg_write = regmap_ac97_reg_write,
66         .reg_read = regmap_ac97_reg_read,
67 };
68
69 struct regmap *__regmap_init_ac97(struct snd_ac97 *ac97,
70                                   const struct regmap_config *config,
71                                   struct lock_class_key *lock_key,
72                                   const char *lock_name)
73 {
74         return __regmap_init(&ac97->dev, &ac97_regmap_bus, ac97, config,
75                              lock_key, lock_name);
76 }
77 EXPORT_SYMBOL_GPL(__regmap_init_ac97);
78
79 struct regmap *__devm_regmap_init_ac97(struct snd_ac97 *ac97,
80                                        const struct regmap_config *config,
81                                        struct lock_class_key *lock_key,
82                                        const char *lock_name)
83 {
84         return __devm_regmap_init(&ac97->dev, &ac97_regmap_bus, ac97, config,
85                                   lock_key, lock_name);
86 }
87 EXPORT_SYMBOL_GPL(__devm_regmap_init_ac97);
88
89 MODULE_LICENSE("GPL v2");