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         snd_soc_unregister_component(*(struct device **)res);
  15 }
  16
  17 /**
  18  * devm_snd_soc_register_component - resource managed component registration
  19  * @dev: Device used to manage component
  20  * @cmpnt_drv: Component driver
  21  * @dai_drv: DAI driver
  22  * @num_dai: Number of DAIs to register
  23  *
  24  * Register a component with automatic unregistration when the device is
  25  * unregistered.
  26  */
  27 int devm_snd_soc_register_component(struct device *dev,
  28                          const struct snd_soc_component_driver *cmpnt_drv,
  29                          struct snd_soc_dai_driver *dai_drv, int num_dai)
  30 {
  31         struct device **ptr;
  32         int ret;
  33
  34         ptr = devres_alloc(devm_component_release, sizeof(*ptr), GFP_KERNEL);
  35         if (!ptr)
  36                 return -ENOMEM;
  37
  38         ret = snd_soc_register_component(dev, cmpnt_drv, dai_drv, num_dai);
  39         if (ret == 0) {
  40                 *ptr = dev;
  41                 devres_add(dev, ptr);
  42         } else {
  43                 devres_free(ptr);
  44         }
  45
  46         return ret;
  47 }
  48 EXPORT_SYMBOL_GPL(devm_snd_soc_register_component);
  49
  50 static void devm_card_release(struct device *dev, void *res)
  51 {
  52         snd_soc_unregister_card(*(struct snd_soc_card **)res);
  53 }
  54
  55 /**
  56  * devm_snd_soc_register_card - resource managed card registration
  57  * @dev: Device used to manage card
  58  * @card: Card to register
  59  *
  60  * Register a card with automatic unregistration when the device is
  61  * unregistered.
  62  */
  63 int devm_snd_soc_register_card(struct device *dev, struct snd_soc_card *card)
  64 {
  65         struct snd_soc_card **ptr;
  66         int ret;
  67
  68         ptr = devres_alloc(devm_card_release, sizeof(*ptr), GFP_KERNEL);
  69         if (!ptr)
  70                 return -ENOMEM;
  71
  72         ret = snd_soc_register_card(card);
  73         if (ret == 0) {
  74                 *ptr = card;
  75                 devres_add(dev, ptr);
  76         } else {
  77                 devres_free(ptr);
  78         }
  79
  80         return ret;
  81 }
  82 EXPORT_SYMBOL_GPL(devm_snd_soc_register_card);
  83
  84 #ifdef CONFIG_SND_SOC_GENERIC_DMAENGINE_PCM
  85
  86 static void devm_dmaengine_pcm_release(struct device *dev, void *res)
  87 {
  88         snd_dmaengine_pcm_unregister(*(struct device **)res);
  89 }
  90
  91 /**
  92  * devm_snd_dmaengine_pcm_register - resource managed dmaengine PCM registration
  93  * @dev: The parent device for the PCM device
  94  * @config: Platform specific PCM configuration
  95  * @flags: Platform specific quirks
  96  *
  97  * Register a dmaengine based PCM device with automatic unregistration when the
  98  * device is unregistered.
  99  */
 100 int devm_snd_dmaengine_pcm_register(struct device *dev,
 101         const struct snd_dmaengine_pcm_config *config, unsigned int flags)
 102 {
 103         struct device **ptr;
 104         int ret;
 105
 106         ptr = devres_alloc(devm_dmaengine_pcm_release, sizeof(*ptr), GFP_KERNEL);
 107         if (!ptr)
 108                 return -ENOMEM;
 109
 110         ret = snd_dmaengine_pcm_register(dev, config, flags);
 111         if (ret == 0) {
 112                 *ptr = dev;
 113                 devres_add(dev, ptr);
 114         } else {
 115                 devres_free(ptr);
 116         }
 117
 118         return ret;
 119 }
 120 EXPORT_SYMBOL_GPL(devm_snd_dmaengine_pcm_register);
 121
 122 #endif