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
devm_component_release(struct device * dev,void * res)12 static 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, *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 */
devm_snd_soc_register_component(struct device * dev,const struct snd_soc_component_driver * cmpnt_drv,struct snd_soc_dai_driver * dai_drv,int num_dai)29 int 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, cmpnt_drv, dai_drv, num_dai);
41 if (ret == 0) {
42 *ptr = cmpnt_drv;
43 devres_add(dev, ptr);
44 } else {
45 devres_free(ptr);
46 }
47
48 return ret;
49 }
50 EXPORT_SYMBOL_GPL(devm_snd_soc_register_component);
51
devm_card_release(struct device * dev,void * res)52 static void devm_card_release(struct device *dev, void *res)
53 {
54 snd_soc_unregister_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 */
devm_snd_soc_register_card(struct device * dev,struct snd_soc_card * card)65 int 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, ptr);
78 } else {
79 devres_free(ptr);
80 }
81
82 return ret;
83 }
84 EXPORT_SYMBOL_GPL(devm_snd_soc_register_card);
85
86 #ifdef CONFIG_SND_SOC_GENERIC_DMAENGINE_PCM
87
devm_dmaengine_pcm_release(struct device * dev,void * res)88 static void devm_dmaengine_pcm_release(struct device *dev, void *res)
89 {
90 snd_dmaengine_pcm_unregister(*(struct device **)res);
91 }
92
93 /**
94 * devm_snd_dmaengine_pcm_register - resource managed dmaengine PCM registration
95 * @dev: The parent device for the PCM device
96 * @config: Platform specific PCM configuration
97 * @flags: Platform specific quirks
98 *
99 * Register a dmaengine based PCM device with automatic unregistration when the
100 * device is unregistered.
101 */
devm_snd_dmaengine_pcm_register(struct device * dev,const struct snd_dmaengine_pcm_config * config,unsigned int flags)102 int devm_snd_dmaengine_pcm_register(struct device *dev,
103 const struct snd_dmaengine_pcm_config *config, unsigned int flags)
104 {
105 struct device **ptr;
106 int ret;
107
108 ptr = devres_alloc(devm_dmaengine_pcm_release, sizeof(*ptr), GFP_KERNEL);
109 if (!ptr)
110 return -ENOMEM;
111
112 ret = snd_dmaengine_pcm_register(dev, config, flags);
113 if (ret == 0) {
114 *ptr = dev;
115 devres_add(dev, ptr);
116 } else {
117 devres_free(ptr);
118 }
119
120 return ret;
121 }
122 EXPORT_SYMBOL_GPL(devm_snd_dmaengine_pcm_register);
123
124 #endif
125