Is it available support for SPDIF or i2s in some linux kernel version for imx233 ?
Yes, both are supported in kernel 2.6.31. which is available in our webpage.
You can confirm what drivers are available in our BSP by consulting the documentation, specifically the Linux Reference Manual.
SPDIF is explicitly shown in the BSP block diagram,
I2S's driver's file name is imx-ssi.c and it is meant to work with the SGTL5000
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