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_dai_release(struct device *dev, void *res) 13 { 14 snd_soc_unregister_dai(*(struct snd_soc_dai **)res); 15 } 16 17 /** 18 * devm_snd_soc_register_dai - resource-managed dai registration 19 * @dev: Device used to manage component 20 * @component: The component the DAIs are registered for 21 * @dai_drv: DAI driver to use for the DAI 22 * @legacy_dai_naming: if %true, use legacy single-name format; 23 * if %false, use multiple-name format; 24 */ 25 struct snd_soc_dai *devm_snd_soc_register_dai(struct device *dev, 26 struct snd_soc_component *component, 27 struct snd_soc_dai_driver *dai_drv, 28 bool legacy_dai_naming) 29 { 30 struct snd_soc_dai **ptr; 31 struct snd_soc_dai *dai; 32 33 ptr = devres_alloc(devm_dai_release, sizeof(*ptr), GFP_KERNEL); 34 if (!ptr) 35 return NULL; 36 37 dai = snd_soc_register_dai(component, dai_drv, legacy_dai_naming); 38 if (dai) { 39 *ptr = dai; 40 devres_add(dev, ptr); 41 } else { 42 devres_free(ptr); 43 } 44 45 return dai; 46 } 47 EXPORT_SYMBOL_GPL(devm_snd_soc_register_dai); 48 49 static void devm_component_release(struct device *dev, void *res) 50 { 51 snd_soc_unregister_component(*(struct device **)res); 52 } 53 54 /** 55 * devm_snd_soc_register_component - resource managed component registration 56 * @dev: Device used to manage component 57 * @cmpnt_drv: Component driver 58 * @dai_drv: DAI driver 59 * @num_dai: Number of DAIs to register 60 * 61 * Register a component with automatic unregistration when the device is 62 * unregistered. 63 */ 64 int devm_snd_soc_register_component(struct device *dev, 65 const struct snd_soc_component_driver *cmpnt_drv, 66 struct snd_soc_dai_driver *dai_drv, int num_dai) 67 { 68 struct device **ptr; 69 int ret; 70 71 ptr = devres_alloc(devm_component_release, sizeof(*ptr), GFP_KERNEL); 72 if (!ptr) 73 return -ENOMEM; 74 75 ret = snd_soc_register_component(dev, cmpnt_drv, dai_drv, num_dai); 76 if (ret == 0) { 77 *ptr = dev; 78 devres_add(dev, ptr); 79 } else { 80 devres_free(ptr); 81 } 82 83 return ret; 84 } 85 EXPORT_SYMBOL_GPL(devm_snd_soc_register_component); 86 87 static void devm_card_release(struct device *dev, void *res) 88 { 89 snd_soc_unregister_card(*(struct snd_soc_card **)res); 90 } 91 92 /** 93 * devm_snd_soc_register_card - resource managed card registration 94 * @dev: Device used to manage card 95 * @card: Card to register 96 * 97 * Register a card with automatic unregistration when the device is 98 * unregistered. 99 */ 100 int devm_snd_soc_register_card(struct device *dev, struct snd_soc_card *card) 101 { 102 struct snd_soc_card **ptr; 103 int ret; 104 105 ptr = devres_alloc(devm_card_release, sizeof(*ptr), GFP_KERNEL); 106 if (!ptr) 107 return -ENOMEM; 108 109 ret = snd_soc_register_card(card); 110 if (ret == 0) { 111 *ptr = card; 112 devres_add(dev, ptr); 113 } else { 114 devres_free(ptr); 115 } 116 117 return ret; 118 } 119 EXPORT_SYMBOL_GPL(devm_snd_soc_register_card); 120 121 #ifdef CONFIG_SND_SOC_GENERIC_DMAENGINE_PCM 122 123 static void devm_dmaengine_pcm_release(struct device *dev, void *res) 124 { 125 snd_dmaengine_pcm_unregister(*(struct device **)res); 126 } 127 128 /** 129 * devm_snd_dmaengine_pcm_register - resource managed dmaengine PCM registration 130 * @dev: The parent device for the PCM device 131 * @config: Platform specific PCM configuration 132 * @flags: Platform specific quirks 133 * 134 * Register a dmaengine based PCM device with automatic unregistration when the 135 * device is unregistered. 136 */ 137 int devm_snd_dmaengine_pcm_register(struct device *dev, 138 const struct snd_dmaengine_pcm_config *config, unsigned int flags) 139 { 140 struct device **ptr; 141 int ret; 142 143 ptr = devres_alloc(devm_dmaengine_pcm_release, sizeof(*ptr), GFP_KERNEL); 144 if (!ptr) 145 return -ENOMEM; 146 147 ret = snd_dmaengine_pcm_register(dev, config, flags); 148 if (ret == 0) { 149 *ptr = dev; 150 devres_add(dev, ptr); 151 } else { 152 devres_free(ptr); 153 } 154 155 return ret; 156 } 157 EXPORT_SYMBOL_GPL(devm_snd_dmaengine_pcm_register); 158 159 #endif 160