We use sdmmc3 to have a sd card extension.
Now tested 4/8/32/64 Gb TF cards of Sandisk, seems ok for lower speed.
The only one is we have a card with class10 level and 32Gb TF caused sys reboot.
What we did is just enable sdmmc3 in dts config about software.
Anyone could give some advices.
Is the hw design bad ?
Or something to do with sw, for example to decrese the clock of sdmmc ?
And how/where to config the clock of sdmmc in dtsi ?