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Re: [RFC PATCH 0/2] hw/sd: Deprecate the SPI mode and the SPI to SD adap
From: |
Philippe Mathieu-Daudé |
Subject: |
Re: [RFC PATCH 0/2] hw/sd: Deprecate the SPI mode and the SPI to SD adapter |
Date: |
Mon, 6 Jul 2020 19:37:36 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 |
On 7/6/20 6:41 PM, Alistair Francis wrote:
> On Sun, Jul 5, 2020 at 3:08 PM 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.
>
> 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.
Glad to hear that! :)
>
> Alistair
>
>>
>> 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
>>
>>
>