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	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 */
 29int 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}
 50EXPORT_SYMBOL_GPL(devm_snd_soc_register_component);
 51
 52static 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 */
 65int 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}
 84EXPORT_SYMBOL_GPL(devm_snd_soc_register_card);
 85
 86int devm_snd_soc_register_deferrable_card(struct device *dev, struct snd_soc_card *card)
 87{
 88	card->devres_dev = dev;
 89	return snd_soc_register_card(card);
 90}
 91EXPORT_SYMBOL_GPL(devm_snd_soc_register_deferrable_card);
 92
 93#ifdef CONFIG_SND_SOC_GENERIC_DMAENGINE_PCM
 94
 95static void devm_dmaengine_pcm_release(struct device *dev, void *res)
 96{
 97	snd_dmaengine_pcm_unregister(*(struct device **)res);
 98}
 99
100/**
101 * devm_snd_dmaengine_pcm_register - resource managed dmaengine PCM registration
102 * @dev: The parent device for the PCM device
103 * @config: Platform specific PCM configuration
104 * @flags: Platform specific quirks
105 *
106 * Register a dmaengine based PCM device with automatic unregistration when the
107 * device is unregistered.
108 */
109int devm_snd_dmaengine_pcm_register(struct device *dev,
110	const struct snd_dmaengine_pcm_config *config, unsigned int flags)
111{
112	struct device **ptr;
113	int ret;
114
115	ptr = devres_alloc(devm_dmaengine_pcm_release, sizeof(*ptr), GFP_KERNEL);
116	if (!ptr)
117		return -ENOMEM;
118
119	ret = snd_dmaengine_pcm_register(dev, config, flags);
120	if (ret == 0) {
121		*ptr = dev;
122		devres_add(dev, ptr);
123	} else {
124		devres_free(ptr);
125	}
126
127	return ret;
128}
129EXPORT_SYMBOL_GPL(devm_snd_dmaengine_pcm_register);
130
131#endif