[U-Boot] dts support in u-boot

[U-Boot] dts support in u-boot

[anupbehare at gmail.com]

Hi,

I am porting u-boot on ppc440x5 core based board. I need to support dts in  
uboot.
As i am new to dts, can anyone please let me know the procedure to support  
it in uboot?

Thanks,
Anup B.

[U-Boot] dts support in u-boot

[Jerry Van Baren]

Hi Anup,

anupbehare at gmail.com wrote:
> Hi,
> 
> I am porting u-boot on ppc440x5 core based board. I need to support dts 
> in uboot.
> As i am new to dts, can anyone please let me know the procedure to 
> support it in uboot?
> 
> Thanks,
> Anup B.

It is already supported in u-boot.
   <http://www.denx.de/wiki/view/DULG/UBootCmdFDT>

You will need to create a .dts file to describe your board, compile it 
with the dtc compiler, and boot using either the 3 parameter version of 
bootm or using a FIT all-in-one image (preferred).
   <u-boot/doc/uImage.FIT/howto.txt>

See also the linux documentation:
   <linux/Documentation/powerpc/booting-without-of.txt>

and some more FDT background:
<http://www.denx.de/wiki/view/U-Boot/UBootFdtInfo#Background_Information_on_Flatte>

If you have specific questions after reading the above, ask away.

Best regards,
gvb

[U-Boot] dts support in u-boot

[anupbehare at gmail.com]

Hi Jerry,

Thanks for the information.

Please find my understanding about dts:
1. I will have to create board specific *.dts file.
2. Need to download latest dtc compiler.
3. Compile dts file using dtc compiler which will generate *.dtb file
4. Enable following macros in u-boot code
#define CONFIG_OF_LIBFDT
#define CONFIG_OF_BOARD_SETUP
5. Apart from these macros no code changes in u-boot source code.

Thanks,
Anup B.



On 27-Nov-2009 8:21pm, Jerry Van Baren <gvb.uboot@gmail.com> wrote:
> Hi Anup,





> anupbehare at gmail.com wrote:




> Hi,





> I am porting u-boot on ppc440x5 core based board. I need to support dts  
> in uboot.


> As i am new to dts, can anyone please let me know the procedure to  
> support it in uboot?





> Thanks,


> Anup B.







> It is already supported in u-boot.


> http://www.denx.de/wiki/view/DULG/UBootCmdFDT>





> You will need to create a .dts file to describe your board, compile it  
> with the dtc compiler, and boot using either the 3 parameter version of  
> bootm or using a FIT all-in-one image (preferred).


> txt>





> See also the linux documentation:


> booting-without-of.txt>





> and some more FDT background:


> http://www.denx.de/wiki/view/U-Boot/UBootFdtInfo#Background_Information_on_Flatte>





> If you have specific questions after reading the above, ask away.





> Best regards,


> gvb

[U-Boot] dts support in u-boot

[Jerry Van Baren]

anupbehare at gmail.com wrote:
> Hi Jerry,
> 
> Thanks for the information.
> 
> Please find my understanding about dts:
> 1. I will have to create board specific *.dts file.

Yes.  You should start with one from the linux source tree that matches 
your essential hardware as closely as possible.  Get the basic 
functionality working and then add non-essential configuration later.

> 2. Need to download latest dtc compiler.
> 3. Compile dts file using dtc compiler which will generate *.dtb file
> 4. Enable following macros in u-boot code
> #define CONFIG_OF_LIBFDT
> #define CONFIG_OF_BOARD_SETUP

Yes to all of the above.

> 5. Apart from these macros no code changes in u-boot source code.

Probably ;-)

> Thanks,
> Anup B.

Best regards,
gvb

[snip]