A20 and eMMC speed

[d.kunchev]

Hi

I am curious about the eMMC editions of the boards with A20. Do they support HS200? I am not certain because I don't see anything above DDR52 mentioned in the mainline kernel sunxi mmc host driver, but I believe both the SoC and memory chip should support it (although at x4 bus width).
Has anyone tested this? Maybe other kernel fork (currently using mainline 4.18-rc3)?

Thanks to anyone that can shed some light
Cheers!

[olimex]

A20 do not support HS200

we have two versions one is with Micron eMMC  ver. 4.51 which makes about 12-13MB/s transfer
we have now new boards with eMMC v5.0 where same A20 processor due to the improved timing in v5.x improve the transfer up to 18-20MB/s

A64 has eMMC v5.x support and multispeed mode and achieve up to 40MB/s transfers