[U-Boot] LIBFDT - changing command line

Michal Simek
2009-08-13T09:23:26Z

Jerry Van Baren wrote:
> Hi Michal,
>
> Michal Simek wrote:
>> Jerry Van Baren wrote:
>>> Hi Michal
>>>
>>> Michal Simek wrote:
>>>> Hi All,
>>>>
>>>> I would like to use fdt for changing command line in DTB but
>>>> I found there is one problem if I have longer command line which
>>>> contains
>>>> any spaces.
>>>> Below is my workflow.
>>>> If I understand correctly the problem is in
>>>> cmd_fdt.c:fdt_parse_prop:593-603.
>>>> It will be worth to add case for supporting
>>>> fdt set /chosen bootargs "console=ttyUL root=/dev/mtdblock0"
>>>> copy from first " to next "
>>>>
>>>> Or is it there any solution which I miss for this case?
>>>>
>>>> Thanks,
>>>> Michal
>>> It is somewhat ugly, but the you can use "\" to escape the spaces:
>>> fdt set /chosen bootargs console=ttyUL\ root=/dev/mtdblock0
>>
>> Of course I tried it but simply not work.
>>
>>
>> U-Boot-mONStR> fdt list /chosen
>> chosen {
>> bootargs = "console=ttyUL0,115200 highres=on
>> root=/dev/mtdblock0";
>> linux,stdout-path = "/plb at 0/serial at 84000000";
>> };
>> U-Boot-mONStR> fdt set /chosen bootargs console=ttyUL\ root=dev
>> U-Boot-mONStR> fdt list /chosen
>> chosen {
>> bootargs = "root=dev";
>> linux,stdout-path = "/plb at 0/serial at 84000000";
>> };
>> U-Boot-mONStR>
>>
>> Can you tried it on your ppc?
>>
>> Michal
>
> It is working for me. Are you running the "hush" shell or the old
> scripting interpreter?

old scripting. With hush works + 11kB.

Thanks,
Michal

>
> => fdt print /chosen
> chosen {
> linux,stdout-path = "/soc8360 at e0000000/serial at 4500";
> };
> => fdt set /chosen bootargs console=ttyUL\ root=/dev/mtdblock0
> => fdt print /chosen
> chosen {
> bootargs = "console=ttyUL root=/dev/mtdblock0";
> linux,stdout-path = "/soc8360 at e0000000/serial at 4500";
> };
> => fdt set /chosen bootargs console=ttyUL\ root=dev
> => fdt print /chosen
> chosen {
> bootargs = "console=ttyUL root=dev";
> linux,stdout-path = "/soc8360 at e0000000/serial at 4500";
> };
>
> Best regards,
> gvb

--
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel 2.6 Microblaze Linux - http://www.monstr.eu/fdt/
Microblaze U-BOOT custodian