fs4412开发板学习笔记(十四)

声卡分析:static struct snd_soc_dai_link s3c2440_uda1341_dai_link = {    .name = "UDA1341",    .stream_name = "UDA134X",    .codec_name = "uda1341-codec",//跟codec里的平台设备名字对应    .codec_dai_name = "uda1341-iis",//跟codec里的dai名字对应     .cpu_dai_name = "s3c2440-iis", //跟platform里的dai平台设备名字对应    .ops = &s3c2440_uda1341_ops,    .platform_name  = "s3c2440-dma",//跟platform里的dma平台设备名字对应};===================================================================================== No soundcards found.[0] =========mixtile_audio_init==============[1] soc-audio soc-audio: ASoC: machine iTOP-4412-Audio should use snd_soc_register_card()[ 2] soc-audio soc-audio: ASoC: CPU DAI samsung-i2s.0 not registered                                        ||                                                  \/                if (!rtd->cpu_dai) {                    dev_err(card->dev, "ASoC: CPU DAI %s not registered\n",   //soc-core.c     P880                        dai_link->cpu_dai_name);                    return -EPROBE_DEFER;                }                                       [3] platform soc-audio: Driver soc-audio requests probe deferral                    ||        static int really_probe(struct device *dev, struct device_driver *drv)        {            if (dev->bus->probe) {                ret = dev->bus->probe(dev);// 调用bus->probe, 由bus->probe调用'具体'dev_drv->probe                  if (ret)                      goto probe_failed;            } else if (drv->probe) {                ret = drv->probe(dev);// 使用'顶层'驱动device_driver的probe                  if (ret)                    goto probe_failed;            }     probe_failed:            /* Driver requested deferred probing 驱动请求延迟探测*/            dev_info(dev, "Driver %s requests probe deferral\n", drv->name);//打印了这一句，说明bus没有probe,driver又没有注册，找不到probe            //（Probe的规则是：如果BUS上实现了probe就用BUS的probe；否则才会用driver的probe。）        }[4] soc-audio: probe of soc-audio failed with error -22移植dev-audio.c+arch\arm\plat-samsung\include\plat\audio.hprintk("--%s-----%d-----\n",__FUNCTION__,__LINE__);printk("--%s-----%d-----ret=%d\n",__FUNCTION__,__LINE__,ret);