SPDIF_STREAM_CFG_OFFSET
aio->regs.i2s_stream_cfg = SPDIF_STREAM_CFG_OFFSET;
value = readl(aio->cygaud->audio + SPDIF_STREAM_CFG_OFFSET);
writel(value, aio->cygaud->audio + SPDIF_STREAM_CFG_OFFSET);