sound/soc/soc-devres.c

   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
  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  */
  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
  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  */
  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
  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  */
 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