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TLV320AIC3263问题请教

麻烦帮忙分析下以下问题的原因

1、i2c无法进行通信,通过i2c的读写函数(系统提供),读写寄存器失败: 

写寄存器,返回-5: 
读寄存器:都是251

2、codec上电,gpio拉不动enable pin(现参考wm8962,通过 regulator 进行上电);
3、aud3_txfs(对应cpu CSI0_DAT6)在启动过程中会被拉高一次,之后又被拉低。软件中并未进行此操作;