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Add SDXC support for DM81xx

Other Parts Discussed in Thread: DM385

Hi,

My ctm was using DM368 but find it only support SDHC which means 32GB max size.

They find that DM385/DM81xx's hardware support SDXC which means higher speed and size capacity, but SW/Driver has no support on SDXC.

So we want to migrate by ourselves.

Here I need your advice on:

1. Is there SDXC support for the same IP-core as DM81xx on other TI devices so we can take for reference?

2. Is the SDXC support something we can fetch from linux community, or it need low layer IP-level support?

3. Is the TRM's description on SD/MMC enough for us to do this work?

4. Other thing may taken care.

Many many thanks!

BR

Eason