Hi Philippe, On Mon, Jul 6, 2020 at 6:07 AM Philippe Mathieu-Daudé <f4bug@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