topic About u-boot device tree in P-Series

About u-boot device tree

saadahmad — Wed, 01 Jun 2016 08:37:59 GMT

Hi,

I am using P2041RDB. I need to add a config DTB at the end of u-boot image by using CONFIG_OF_SEPARATE.

According to common/board_f.c function setup_fdt()

#elif defined CONFIG_OF_SEPARATE

/* FDT is at end of image */

gd->fdt_blob = (ulong *)&_end;

But there is no _end in u-boot.lds of mpc85xx. I have changed _end to __bss_end but u-boot is not finding any DTB at the end of the image.

Thanks in advance for any help you are able to provide.

Re: About u-boot device tree

Pavel — Thu, 02 Jun 2016 07:50:45 GMT

NXP SDK 2.0 does not support this option of the u-boot. There is error message during u-boot building if CONFIG_OF_SEPARATE is defined.

Have a great day,
Pavel Chubakov

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Re: About u-boot device tree

saadahmad — Thu, 02 Jun 2016 08:21:49 GMT

I am not using SDK 2.0. I just want to know where to put the _end (end of u-boot image location) in u-boot.lds.

Regards,
Saad

Re: About u-boot device tree

Pavel — Mon, 06 Jun 2016 06:55:14 GMT

We use SDK from NXP.

The following command sequence is used for u-boot building under SDK:

bitbake -c cleansstate u-boot

bitbake -c patch u-boot // source of the u-boot

bitbake u-boot

Have a great day,
Pavel Chubakov