[U-Boot] u-boot.dtb is not generated when enabling verified boot

[Davis Roman]

Hello,

I'm trying to get verified-boot working using u-boot 2016.03 on an imx6.

So far I've managed to figure out that I need the following additional
config settings:
 #define CONFIG_DM
#define CONFIG_ENABLE_VBOOT
#define CONFIG_RSA
#define CONFIG_FIT
#define CONFIG_OF_CONTROL
#define CONFIG_FIT_SIGNATURE
#define CONFIG_OF_SEPERATE
#define CONFIG_OF_LIBFDT
#define CONFIG_FIT_VERBOSE

However, no matter what I do I can't seem to generate u-boot.dtb.

My understanding is that u-boot automatically generates this
u-boot.dtb for the purpose of storing
the public key when mkimage signs the fitimage and that this process
does not require that I provide a dts file.

However, below are the files that are generated with my current
configuration and no u-boot.dtb file is generated.

Additionally, since u-boot produces a u-boot-nodtb.bin, I figured it
was reasonable to believe that u-boot.bin contained the device tree
however as shown below both u-boot-nodtb.bin and u-boot.bin have an
idential hash.

Is there something that I'm missing here? Any advice would be greatly
appreciated

Thank you,

Davis

davis at XPS-15-9560:~/Desktop/u-boot-work/uboot-imx$ ls -l *u-boot*
-rwxrwxr-x 1 davis davis 3413272 Apr 20 23:41 u-boot
-rwxrwxr-x 1 davis davis  506052 Apr 20 23:37 u-boot.bin
-rw-rw-r-- 1 davis davis   39490 Apr 20 23:27 u-boot.cfg
-rw-rw-r-- 1 davis davis  510976 Apr 20 23:37 u-boot.imx
-rw-rw-r-- 1 davis davis    1286 Apr 20 23:37 u-boot.lds
-rw-rw-r-- 1 davis davis  456812 Apr 20 23:41 u-boot.map
-rwxrwxr-x 1 davis davis  506052 Apr 20 23:37 u-boot-nodtb.bin
-rwxrwxr-x 1 davis davis 1518250 Apr 20 23:37 u-boot.srec
-rw-rw-r-- 1 davis davis  119239 Apr 20 23:37 u-boot.sym
davis at XPS-15-9560:~/Desktop/u-boot-work/uboot-imx$
davis at XPS-15-9560:~/Desktop/u-boot-work/uboot-imx$ sha1sum  *u-boot*
cf00f776da67d1081fdfb8578ce71d0a63f16c48  u-boot
1fa17e1e90b51fc0dce73cf3f88d03cad0664a6f  u-boot.bin
1d2ad68da6c9aa7915f8684c53b6c532a07d7c7b  u-boot.cfg
599cec8e768eebf313d6735951c02c1271475f72  u-boot.imx
97054bccafd82b873a0af24f8e012ff032809b29  u-boot.lds
547e4e8cd4e46b5f9755aee4906a5f84906e2331  u-boot.map
1fa17e1e90b51fc0dce73cf3f88d03cad0664a6f  u-boot-nodtb.bin
bb5aaaa839b8f23c6c8d952e65f99efac695ae91  u-boot.srec
5f933891f3939802ab92c4d642af16973b60af37  u-boot.sym
davis at XPS-15-9560:~/Desktop/u-boot-work/uboot-imx$