On Wed, Oct 18, 2017 at 11:00 PM, Joonas Kylm?l? [off-list ref] wrote:

Hi,

Chen-Yu Tsai:

quoted

mmc1 only has 1 possible pinmux setting.

What if someone is using the MMC with bus width 1 and then using the
remaining 3 pins for something else?

I would very much like to see such a design. Currently the devices
we see all follow Allwinner's reference design, with only minor
modifications. As such, mmc1 is used exclusively for connecting
SDIO-based WiFi modules.

If such a radical(?) design is done, the vendor can always add
a "mmc1-1bit-pins" setting and override the default.

ChenYu