LXR linux/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
  12static 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 */
  27int 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}
  48EXPORT_SYMBOL_GPL(devm_snd_soc_register_component);
  49
  50static 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 */
  63int 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}
  82EXPORT_SYMBOL_GPL(devm_snd_soc_register_card);
  83
  84#ifdef CONFIG_SND_SOC_GENERIC_DMAENGINE_PCM
  85
  86static 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 */
 100int 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}
 120EXPORT_SYMBOL_GPL(devm_snd_dmaengine_pcm_register);
 121
 122#endif
 123