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 const struct snd_soc_component_driver **cmpnt_drv = res; 52 53 snd_soc_unregister_component_by_driver(dev, *cmpnt_drv); 54 } 55 56 /** 57 * devm_snd_soc_register_component - resource managed component registration 58 * @dev: Device used to manage component 59 * @cmpnt_drv: Component driver 60 * @dai_drv: DAI driver 61 * @num_dai: Number of DAIs to register 62 * 63 * Register a component with automatic unregistration when the device is 64 * unregistered. 65 */ 66 int devm_snd_soc_register_component(struct device *dev, 67 const struct snd_soc_component_driver *cmpnt_drv, 68 struct snd_soc_dai_driver *dai_drv, int num_dai) 69 { 70 const struct snd_soc_component_driver **ptr; 71 int ret; 72 73 ptr = devres_alloc(devm_component_release, sizeof(*ptr), GFP_KERNEL); 74 if (!ptr) 75 return -ENOMEM; 76 77 ret = snd_soc_register_component(dev, cmpnt_drv, dai_drv, num_dai); 78 if (ret == 0) { 79 *ptr = cmpnt_drv; 80 devres_add(dev, ptr); 81 } else { 82 devres_free(ptr); 83 } 84 85 return ret; 86 } 87 EXPORT_SYMBOL_GPL(devm_snd_soc_register_component); 88 89 static void devm_card_release(struct device *dev, void *res) 90 { 91 snd_soc_unregister_card(*(struct snd_soc_card **)res); 92 } 93 94 /** 95 * devm_snd_soc_register_card - resource managed card registration 96 * @dev: Device used to manage card 97 * @card: Card to register 98 * 99 * Register a card with automatic unregistration when the device is 100 * unregistered. 101 */ 102 int devm_snd_soc_register_card(struct device *dev, struct snd_soc_card *card) 103 { 104 struct snd_soc_card **ptr; 105 int ret; 106 107 ptr = devres_alloc(devm_card_release, sizeof(*ptr), GFP_KERNEL); 108 if (!ptr) 109 return -ENOMEM; 110 111 ret = snd_soc_register_card(card); 112 if (ret == 0) { 113 *ptr = card; 114 devres_add(dev, ptr); 115 } else { 116 devres_free(ptr); 117 } 118 119 return ret; 120 } 121 EXPORT_SYMBOL_GPL(devm_snd_soc_register_card); 122 123 #ifdef CONFIG_SND_SOC_GENERIC_DMAENGINE_PCM 124 125 static void devm_dmaengine_pcm_release(struct device *dev, void *res) 126 { 127 snd_dmaengine_pcm_unregister(*(struct device **)res); 128 } 129 130 /** 131 * devm_snd_dmaengine_pcm_register - resource managed dmaengine PCM registration 132 * @dev: The parent device for the PCM device 133 * @config: Platform specific PCM configuration 134 * @flags: Platform specific quirks 135 * 136 * Register a dmaengine based PCM device with automatic unregistration when the 137 * device is unregistered. 138 */ 139 int devm_snd_dmaengine_pcm_register(struct device *dev, 140 const struct snd_dmaengine_pcm_config *config, unsigned int flags) 141 { 142 struct device **ptr; 143 int ret; 144 145 ptr = devres_alloc(devm_dmaengine_pcm_release, sizeof(*ptr), GFP_KERNEL); 146 if (!ptr) 147 return -ENOMEM; 148 149 ret = snd_dmaengine_pcm_register(dev, config, flags); 150 if (ret == 0) { 151 *ptr = dev; 152 devres_add(dev, ptr); 153 } else { 154 devres_free(ptr); 155 } 156 157 return ret; 158 } 159 EXPORT_SYMBOL_GPL(devm_snd_dmaengine_pcm_register); 160 161 #endif 162