sound/soc/soc-devres.c

   1 /*
   2  * soc-devres.c  --  ALSA SoC Audio Layer devres functions
   3  *
   4  * Copyright (C) 2013 Linaro Ltd
   5  *
   6  *  This program is free software; you can redistribute  it and/or modify it
   7  *  under  the terms of  the GNU General  Public License as published by the
   8  *  Free Software Foundation;  either version 2 of the  License, or (at your
   9  *  option) any later version.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/moduleparam.h>
  14 #include <sound/soc.h>
  15 #include <sound/dmaengine_pcm.h>
  16
  17 static void devm_component_release(struct device *dev, void *res)
  18 {
  19         snd_soc_unregister_component(*(struct device **)res);
  20 }
  21
  22 /**
  23  * devm_snd_soc_register_component - resource managed component registration
  24  * @dev: Device used to manage component
  25  * @cmpnt_drv: Component driver
  26  * @dai_drv: DAI driver
  27  * @num_dai: Number of DAIs to register
  28  *
  29  * Register a component with automatic unregistration when the device is
  30  * unregistered.
  31  */
  32 int devm_snd_soc_register_component(struct device *dev,
  33                          const struct snd_soc_component_driver *cmpnt_drv,
  34                          struct snd_soc_dai_driver *dai_drv, int num_dai)
  35 {
  36         struct device **ptr;
  37         int ret;
  38
  39         ptr = devres_alloc(devm_component_release, sizeof(*ptr), GFP_KERNEL);
  40         if (!ptr)
  41                 return -ENOMEM;
  42
  43         ret = snd_soc_register_component(dev, cmpnt_drv, dai_drv, num_dai);
  44         if (ret == 0) {
  45                 *ptr = dev;
  46                 devres_add(dev, ptr);
  47         } else {
  48                 devres_free(ptr);
  49         }
  50
  51         return ret;
  52 }
  53 EXPORT_SYMBOL_GPL(devm_snd_soc_register_component);
  54
  55 static void devm_platform_release(struct device *dev, void *res)
  56 {
  57         snd_soc_unregister_platform(*(struct device **)res);
  58 }
  59
  60 /**
  61  * devm_snd_soc_register_platform - resource managed platform registration
  62  * @dev: Device used to manage platform
  63  * @platform: platform to register
  64  *
  65  * Register a platform driver with automatic unregistration when the device is
  66  * unregistered.
  67  */
  68 int devm_snd_soc_register_platform(struct device *dev,
  69                         const struct snd_soc_platform_driver *platform_drv)
  70 {
  71         struct device **ptr;
  72         int ret;
  73
  74         ptr = devres_alloc(devm_platform_release, sizeof(*ptr), GFP_KERNEL);
  75         if (!ptr)
  76                 return -ENOMEM;
  77
  78         ret = snd_soc_register_platform(dev, platform_drv);
  79         if (ret == 0) {
  80                 *ptr = dev;
  81                 devres_add(dev, ptr);
  82         } else {
  83                 devres_free(ptr);
  84         }
  85
  86         return ret;
  87 }
  88 EXPORT_SYMBOL_GPL(devm_snd_soc_register_platform);
  89
  90 static void devm_card_release(struct device *dev, void *res)
  91 {
  92         snd_soc_unregister_card(*(struct snd_soc_card **)res);
  93 }
  94
  95 /**
  96  * devm_snd_soc_register_card - resource managed card registration
  97  * @dev: Device used to manage card
  98  * @card: Card to register
  99  *
 100  * Register a card with automatic unregistration when the device is
 101  * unregistered.
 102  */
 103 int devm_snd_soc_register_card(struct device *dev, struct snd_soc_card *card)
 104 {
 105         struct snd_soc_card **ptr;
 106         int ret;
 107
 108         ptr = devres_alloc(devm_card_release, sizeof(*ptr), GFP_KERNEL);
 109         if (!ptr)
 110                 return -ENOMEM;
 111
 112         ret = snd_soc_register_card(card);
 113         if (ret == 0) {
 114                 *ptr = card;
 115                 devres_add(dev, ptr);
 116         } else {
 117                 devres_free(ptr);
 118         }
 119
 120         return ret;
 121 }
 122 EXPORT_SYMBOL_GPL(devm_snd_soc_register_card);
 123
 124 #ifdef CONFIG_SND_SOC_GENERIC_DMAENGINE_PCM
 125
 126 static void devm_dmaengine_pcm_release(struct device *dev, void *res)
 127 {
 128         snd_dmaengine_pcm_unregister(*(struct device **)res);
 129 }
 130
 131 /**
 132  * devm_snd_dmaengine_pcm_register - resource managed dmaengine PCM registration
 133  * @dev: The parent device for the PCM device
 134  * @config: Platform specific PCM configuration
 135  * @flags: Platform specific quirks
 136  *
 137  * Register a dmaengine based PCM device with automatic unregistration when the
 138  * device is unregistered.
 139  */
 140 int devm_snd_dmaengine_pcm_register(struct device *dev,
 141         const struct snd_dmaengine_pcm_config *config, unsigned int flags)
 142 {
 143         struct device **ptr;
 144         int ret;
 145
 146         ptr = devres_alloc(devm_dmaengine_pcm_release, sizeof(*ptr), GFP_KERNEL);
 147         if (!ptr)
 148                 return -ENOMEM;
 149
 150         ret = snd_dmaengine_pcm_register(dev, config, flags);
 151         if (ret == 0) {
 152                 *ptr = dev;
 153                 devres_add(dev, ptr);
 154         } else {
 155                 devres_free(ptr);
 156         }
 157
 158         return ret;
 159 }
 160 EXPORT_SYMBOL_GPL(devm_snd_dmaengine_pcm_register);
 161
 162 #endif