[RFC PATCH 0/2] hw/sd: Deprecate the SPI mode and the SPI to SD adapter

[Bin Meng]

Hi Philippe,

On Mon, Jul 6, 2020 at 6:07 AM Philippe Mathieu-Daudé <f4bug at amsat.org> wrote:
>
> I tried to maintain the SPI mode because it is useful in
> tiny embedded devices, and thought it would be helpful for
> the AVR MCUs.
> As AVR was blocked, I thought it was wise to deprecate the
> SPI mode as users are interested in the faster MMC mode.
> Today Thomas surprised me by posting an update of it!
> https://www.mail-archive.com/qemu-devel@nongnu.org/msg720089.html
>
> I'm still posting this as RFC to discuss, but I'm reconsiderating
> keeping this mode a bit more.
>

AFAIK, SiFive folks (Pragnesh in cc) are investigating supporting QSPI
model on "sifive_u" machine, and it will definitely use this SPI over
SD model.

In fact, the QSPI is the last big gap in the "sifive_u" machine to
make it a complete platform for hardware replacement.

Regards,
Bin