BPi-R4: change EMMC to SDMMC when booting from NAND

[InsaneTimeWatcher]

I've got the system booting fine when u-boot is installed on an NAND , and i'm try replace dts select in defconfig , but SDMMC is missing (EMMC disabled , not showing in dev)

Or only EMMC by hardware switch?

[frank-w]

Why do you want to change this? Nand is intended to install emmc as you cannot access it from sd

[InsaneTimeWatcher]

i want openwrt work in nand , connect sdcard (big size) for extroot , but work only emmc 8gb

in forum thread see is possible https://forum.banana-pi.org/t/bpi-r4-u-boot-on-nand-but-activating-emmc-instead-sd/19754

[frank-w]

when you want openwrt on nand you have to install it from openwrt sdcard and not install my uboot on nand....

having a uboot on nand without emmc dts does not make sense because then you cannot access emmc from nand, hardware-switches imho enable emmc anyway so you cannot use sdcard after booting from nand