sound/soc/soc-devres.c

0001 // SPDX-License-Identifier: GPL-2.0+
0002 //
0003 // soc-devres.c  --  ALSA SoC Audio Layer devres functions
0004 //
0005 // Copyright (C) 2013 Linaro Ltd
0006
0007 #include <linux/module.h>
0008 #include <linux/moduleparam.h>
0009 #include <sound/soc.h>
0010 #include <sound/dmaengine_pcm.h>
0011
0012 static void devm_dai_release(struct device *dev, void *res)
0013 {
0014     snd_soc_unregister_dai(*(struct snd_soc_dai **)res);
0015 }
0016
0017 /**
0018  * devm_snd_soc_register_dai - resource-managed dai registration
0019  * @dev: Device used to manage component
0020  * @component: The component the DAIs are registered for
0021  * @dai_drv: DAI driver to use for the DAI
0022  * @legacy_dai_naming: if %true, use legacy single-name format;
0023  *  if %false, use multiple-name format;
0024  */
0025 struct snd_soc_dai *devm_snd_soc_register_dai(struct device *dev,
0026                           struct snd_soc_component *component,
0027                           struct snd_soc_dai_driver *dai_drv,
0028                           bool legacy_dai_naming)
0029 {
0030     struct snd_soc_dai **ptr;
0031     struct snd_soc_dai *dai;
0032
0033     ptr = devres_alloc(devm_dai_release, sizeof(*ptr), GFP_KERNEL);
0034     if (!ptr)
0035         return NULL;
0036
0037     dai = snd_soc_register_dai(component, dai_drv, legacy_dai_naming);
0038     if (dai) {
0039         *ptr = dai;
0040         devres_add(dev, ptr);
0041     } else {
0042         devres_free(ptr);
0043     }
0044
0045     return dai;
0046 }
0047 EXPORT_SYMBOL_GPL(devm_snd_soc_register_dai);
0048
0049 static void devm_component_release(struct device *dev, void *res)
0050 {
0051     const struct snd_soc_component_driver **cmpnt_drv = res;
0052
0053     snd_soc_unregister_component_by_driver(dev, *cmpnt_drv);
0054 }
0055
0056 /**
0057  * devm_snd_soc_register_component - resource managed component registration
0058  * @dev: Device used to manage component
0059  * @cmpnt_drv: Component driver
0060  * @dai_drv: DAI driver
0061  * @num_dai: Number of DAIs to register
0062  *
0063  * Register a component with automatic unregistration when the device is
0064  * unregistered.
0065  */
0066 int devm_snd_soc_register_component(struct device *dev,
0067              const struct snd_soc_component_driver *cmpnt_drv,
0068              struct snd_soc_dai_driver *dai_drv, int num_dai)
0069 {
0070     const struct snd_soc_component_driver **ptr;
0071     int ret;
0072
0073     ptr = devres_alloc(devm_component_release, sizeof(*ptr), GFP_KERNEL);
0074     if (!ptr)
0075         return -ENOMEM;
0076
0077     ret = snd_soc_register_component(dev, cmpnt_drv, dai_drv, num_dai);
0078     if (ret == 0) {
0079         *ptr = cmpnt_drv;
0080         devres_add(dev, ptr);
0081     } else {
0082         devres_free(ptr);
0083     }
0084
0085     return ret;
0086 }
0087 EXPORT_SYMBOL_GPL(devm_snd_soc_register_component);
0088
0089 static void devm_card_release(struct device *dev, void *res)
0090 {
0091     snd_soc_unregister_card(*(struct snd_soc_card **)res);
0092 }
0093
0094 /**
0095  * devm_snd_soc_register_card - resource managed card registration
0096  * @dev: Device used to manage card
0097  * @card: Card to register
0098  *
0099  * Register a card with automatic unregistration when the device is
0100  * unregistered.
0101  */
0102 int devm_snd_soc_register_card(struct device *dev, struct snd_soc_card *card)
0103 {
0104     struct snd_soc_card **ptr;
0105     int ret;
0106
0107     ptr = devres_alloc(devm_card_release, sizeof(*ptr), GFP_KERNEL);
0108     if (!ptr)
0109         return -ENOMEM;
0110
0111     ret = snd_soc_register_card(card);
0112     if (ret == 0) {
0113         *ptr = card;
0114         devres_add(dev, ptr);
0115     } else {
0116         devres_free(ptr);
0117     }
0118
0119     return ret;
0120 }
0121 EXPORT_SYMBOL_GPL(devm_snd_soc_register_card);
0122
0123 #ifdef CONFIG_SND_SOC_GENERIC_DMAENGINE_PCM
0124
0125 static void devm_dmaengine_pcm_release(struct device *dev, void *res)
0126 {
0127     snd_dmaengine_pcm_unregister(*(struct device **)res);
0128 }
0129
0130 /**
0131  * devm_snd_dmaengine_pcm_register - resource managed dmaengine PCM registration
0132  * @dev: The parent device for the PCM device
0133  * @config: Platform specific PCM configuration
0134  * @flags: Platform specific quirks
0135  *
0136  * Register a dmaengine based PCM device with automatic unregistration when the
0137  * device is unregistered.
0138  */
0139 int devm_snd_dmaengine_pcm_register(struct device *dev,
0140     const struct snd_dmaengine_pcm_config *config, unsigned int flags)
0141 {
0142     struct device **ptr;
0143     int ret;
0144
0145     ptr = devres_alloc(devm_dmaengine_pcm_release, sizeof(*ptr), GFP_KERNEL);
0146     if (!ptr)
0147         return -ENOMEM;
0148
0149     ret = snd_dmaengine_pcm_register(dev, config, flags);
0150     if (ret == 0) {
0151         *ptr = dev;
0152         devres_add(dev, ptr);
0153     } else {
0154         devres_free(ptr);
0155     }
0156
0157     return ret;
0158 }
0159 EXPORT_SYMBOL_GPL(devm_snd_dmaengine_pcm_register);
0160
0161 #endif