I have a wifi module (Marvel 8797 - SDIO 3.0) that is connected to USDHC4.
My pinmux settings for my port as follow: (LVE is enabled).
My wifi module works on 1-bit mode but not on 4-bit mode. That is because the SDIO 3.0 require an UHSI (it require 1.8v signaling) enabled and by default, the kernel seems not configured for the said mode.
I would like to know what are the missing keys in order to enable it correctly?.