rpi2 uboot no overlays via nfs

[qaron]

i have raspberry pi 2 v1.1 and its working via nfs with the exception that no overlays are loaded.

my sd contains:
boot.cmd boot.scr bootcode.bin config.txt start.elf u-boot.bin

my boot.cmd contains:
$this->bbcode_second_pass_code('', 'setenv kernel kernel7.img
setenv fdtfile bcm2709-rpi-2-b.dtb
setenv initramfs initramfs-linux.img
setenv ipaddr 192.168.1.254
setenv serverip 192.168.1.2
setenv bootargs "ip=192.168.1.254::192.168.1.1:255.255.255.0:pi:eth0:off root=/dev/nfs/ nfsroot=${serverip}:/ rootfstype=ext4 rw rootwait console=ttyAMA0,115200 console=tty1 selinux=0 plymouth.enable=0 smsc95xx.turbo_mode=N dwc_otg.lpm_enable=0 kgdboc=ttyAMA0,115200 elevator=noop"
tftp ${fdt_addr_r} /${fdtfile}
tftp ${kernel_addr_r} /${kernel}
tftp ${ramdisk_addr_r} /${initramfs}
bootz ${kernel_addr_r} ${ramdisk_addr_r}:${filesize} ${fdt_addr_r}; ')

my config.txt contains:
$this->bbcode_second_pass_code('', '# uncomment if you get no picture on HDMI for a default "safe" mode
#hdmi_safe=1

# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan
#disable_overscan=1

# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border
#overscan_left=16
#overscan_right=16
#overscan_top=16
#overscan_bottom=16

# uncomment to force a console size. By default it will be display's size minus
# overscan.
#framebuffer_width=1280
#framebuffer_height=720

# uncomment if hdmi display is not detected and composite is being output
#hdmi_force_hotplug=1

# uncomment to force a specific HDMI mode (this will force VGA)
#hdmi_group=1
#hdmi_mode=1

# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes
#hdmi_drive=2

# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display
#config_hdmi_boost=4

# uncomment for composite PAL
#sdtv_mode=2

#uncomment to overclock the arm. 700 MHz is the default.
#arm_freq=800

# for more options see http://elinux.org/RPi_config.txt
kernel=u-boot.bin
dtparam=i2c_arm=on')

$this->bbcode_second_pass_code('', '[pi@pi /]$ cat /etc/modules-load.d/i2c.conf
i2c-dev
i2c-bcm2708

[pi@pi /]$ i2cdetect -y 1
Error: Could not open file `/dev/i2c-1' or `/dev/i2c/1': No such file or directory
[pi@pi /]$ i2cdetect -y 0
Error: Could not open file `/dev/i2c-0' or `/dev/i2c/0': No such file or directory')

$this->bbcode_second_pass_code('', '[pi@pi /]$ ls /boot
bcm2709-rpi-2-b.dtb bcm2710-rpi-cm3.dtb bootcode.bin fixup_cd.dat overlays
bcm2710-rpi-2-b.dtb bcm2836-rpi-2-b.dtb cmdline.txt fixup_db.dat start.elf
bcm2710-rpi-3-b-plus.dtb bcm2837-rpi-3-b-plus.dtb config.txt initramfs-linux.img start_cd.elf
bcm2710-rpi-3-b.dtb bcm2837-rpi-3-b.dtb fixup.dat kernel7.img start_db.elf
')

the system is booting no argue about that BUT!!! arch linux has the ability to update indefinitely and with uboot i want to target my network boot folder, load in memory the kernel7.img/bcm2709-rpi-2-b.dtb/initramfs-linux.img and take advantage of that without worrying about sd degradation. can i do that?

[qaron]

and yes before anyone says about permissions:
$this->bbcode_second_pass_code('', '[pi@pi /]$ cat /etc/udev/rules.d/i2c.rules
KERNEL=="i2c-[0-9]*", GROUP="wheel"
')

[qaron]

Finally I think , I found it!!!!!
you copy all files inside the sd and you boot the system
you login via ssh and you give this command to create the new device tree for raspberry pi:
$this->bbcode_second_pass_code('', 'dtc -I fs -O dtb -o base.dtb /proc/device-tree')
you copy the file inside the nfs/boot folder and you edit the boot.cmd to download it from the tft server!!!!!!
after that everything works!!!

$this->bbcode_second_pass_code('', '[pi@pi ~]$ i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- 76 -- ')