[U-Boot] *preferred* place in u-boot to tweak device tree?

a while back, i asked about the best way to have u-boot extract the MAC address from a well-known address in flash, and add it to the device tree to pass to the kernel; discussion was here:

http://lists.denx.de/pipermail/u-boot/2016-May/255856.html

i notice that another option for tweaking the MAC address that is popular is to add that code to a board's misc_init_r(). so both ways work just fine, but i'm assuming that the *proper* place to do it is in ft_board_setup(), since the routine image_setup_libfdt() pretty much handles everything, and all that's left to do is extend ft_board_setup() to set the env variable:

eth_setenv_enetaddr("ethaddr", <physical addr of 6-byte MAC address>);

is that what you'd call "best practice"?

rday