1// SPDX-License-Identifier: GPL-2.0+
2//
3// soc-devres.c -- ALSA SoC Audio Layer devres functions
4//
5// Copyright (C) 2013 Linaro Ltd
6
7#include <linux/module.h>
8#include <linux/moduleparam.h>
9#include <sound/soc.h>
10#include <sound/dmaengine_pcm.h>
11
12static void devm_component_release(struct device *dev, void *res)
13{
14 const struct snd_soc_component_driver **cmpnt_drv = res;
15
16 snd_soc_unregister_component_by_driver(dev, component_driver: *cmpnt_drv);
17}
18
19/**
20 * devm_snd_soc_register_component - resource managed component registration
21 * @dev: Device used to manage component
22 * @cmpnt_drv: Component driver
23 * @dai_drv: DAI driver
24 * @num_dai: Number of DAIs to register
25 *
26 * Register a component with automatic unregistration when the device is
27 * unregistered.
28 */
29int devm_snd_soc_register_component(struct device *dev,
30 const struct snd_soc_component_driver *cmpnt_drv,
31 struct snd_soc_dai_driver *dai_drv, int num_dai)
32{
33 const struct snd_soc_component_driver **ptr;
34 int ret;
35
36 ptr = devres_alloc(devm_component_release, sizeof(*ptr), GFP_KERNEL);
37 if (!ptr)
38 return -ENOMEM;
39
40 ret = snd_soc_register_component(dev, component_driver: cmpnt_drv, dai_drv, num_dai);
41 if (ret == 0) {
42 *ptr = cmpnt_drv;
43 devres_add(dev, res: ptr);
44 } else {
45 devres_free(res: ptr);
46 }
47
48 return ret;
49}
50EXPORT_SYMBOL_GPL(devm_snd_soc_register_component);
51
52static void devm_card_release(struct device *dev, void *res)
53{
54 snd_soc_unregister_card(card: *(struct snd_soc_card **)res);
55}
56
57/**
58 * devm_snd_soc_register_card - resource managed card registration
59 * @dev: Device used to manage card
60 * @card: Card to register
61 *
62 * Register a card with automatic unregistration when the device is
63 * unregistered.
64 */
65int devm_snd_soc_register_card(struct device *dev, struct snd_soc_card *card)
66{
67 struct snd_soc_card **ptr;
68 int ret;
69
70 ptr = devres_alloc(devm_card_release, sizeof(*ptr), GFP_KERNEL);
71 if (!ptr)
72 return -ENOMEM;
73
74 ret = snd_soc_register_card(card);
75 if (ret == 0) {
76 *ptr = card;
77 devres_add(dev, res: ptr);
78 } else {
79 devres_free(res: ptr);
80 }
81
82 return ret;
83}
84EXPORT_SYMBOL_GPL(devm_snd_soc_register_card);
85
86int devm_snd_soc_register_deferrable_card(struct device *dev, struct snd_soc_card *card)
87{
88 card->devres_dev = dev;
89 return snd_soc_register_card(card);
90}
91EXPORT_SYMBOL_GPL(devm_snd_soc_register_deferrable_card);
92
93#ifdef CONFIG_SND_SOC_GENERIC_DMAENGINE_PCM
94
95static void devm_dmaengine_pcm_release(struct device *dev, void *res)
96{
97 snd_dmaengine_pcm_unregister(dev: *(struct device **)res);
98}
99
100/**
101 * devm_snd_dmaengine_pcm_register - resource managed dmaengine PCM registration
102 * @dev: The parent device for the PCM device
103 * @config: Platform specific PCM configuration
104 * @flags: Platform specific quirks
105 *
106 * Register a dmaengine based PCM device with automatic unregistration when the
107 * device is unregistered.
108 */
109int devm_snd_dmaengine_pcm_register(struct device *dev,
110 const struct snd_dmaengine_pcm_config *config, unsigned int flags)
111{
112 struct device **ptr;
113 int ret;
114
115 ptr = devres_alloc(devm_dmaengine_pcm_release, sizeof(*ptr), GFP_KERNEL);
116 if (!ptr)
117 return -ENOMEM;
118
119 ret = snd_dmaengine_pcm_register(dev, config, flags);
120 if (ret == 0) {
121 *ptr = dev;
122 devres_add(dev, res: ptr);
123 } else {
124 devres_free(res: ptr);
125 }
126
127 return ret;
128}
129EXPORT_SYMBOL_GPL(devm_snd_dmaengine_pcm_register);
130
131#endif
132

source code of linux/sound/soc/soc-devres.c