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

Alistair Francis alistair23 at gmail.com
Mon Jul 6 16:41:58 UTC 2020

On Sun, Jul 5, 2020 at 3:08 PM 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.

I think it's worth keeping.

I'm pretty sure the HiFive Unleashed (sifive_u in QEMU) uses SD over
SPI. There isn't an upstream model but I think there are out of tree
patches that hopefully one day will make it upstream.


> Philippe Mathieu-Daudé (2):
>   hw/sd/ssi-sd: Deprecate the SPI to SD card 'adapter'
>   hw/sd/sdcard: Deprecate the SPI mode
>  docs/system/deprecated.rst | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> --
> 2.21.3

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