[U-Boot] SPL and DM on ZYNQ

[Simon Glass]

Hi Jagan,

On 7 October 2015 at 19:01, Jagan Teki <jteki at openedev.com> wrote:
> On 7 October 2015 at 21:29, Simon Glass <sjg at chromium.org> wrote:
>> Hi,
>>
>> On 7 October 2015 at 13:50, Hannes Schmelzer <hannes at schmelzer.or.at> wrote:
>>> hi folks,
>>>
>>> i am not very familar with driver model until now and so i've a question.
>>>
>>> I'm trying to bring up my Zynq ZC702 evalboard using driver-model during SPL
>>> stage (because QSPI needs this).
>>> I simply switched on "Driver Model for SPL" within Kconfig and compiled.
>>>
>>> This ends up in:
>>>
>>> U-Boot SPL 2015.10-rc4-00050-g996ec1d-dirty (Oct 07 2015 - 13:57:32)
>>>>>spl:board_init_r()
>>> using memory 0xffff10c0-0xffff20c0 for malloc()
>>> spl_init()
>>> dm_init() failed: -2
>>> dm_init_and_scan() returned error -2
>>> ### ERROR ### Please RESET the board ###
>>>
>>>
>>> i had a look into drivers/core/root.c and saw that
>>>
>>> device_bind_by_name(NULL, false, &root_info, &DM_ROOT_NON_CONST);
>>>
>>> fails.
>>>
>>> Any idea why the root-driver cannot be found ?
>>> Maybe there are some switched need to be switched on too.
>>
>> Is there any chance that your SPL does not have the linker lists set
>> up correctly?
>>
>> See this code in the standard ARM u-boot-spl.lds:
>>
>> #ifdef CONFIG_SPL_DM
>> .u_boot_list : {
>> KEEP(*(SORT(.u_boot_list_*_driver_*)));
>> KEEP(*(SORT(.u_boot_list_*_uclass_*)));
>> }
>> #endif
>
> I think these changes still in queue[1] I'm keep sending remainders,
> there is on PR blocks these changes[2]
>
> [1] http://git.denx.de/?p=u-boot/u-boot-dm.git;a=shortlog;h=refs/heads/zynq-working
> [2] https://patchwork.ozlabs.org/patch/517709/
>

OK, I don't believe they are going in before the release, nor that I
should be pulling them. Please let me know if I have this wrong.

>>
>> I don't see it in the zynq one (arch/arm/mach-zynq).
>>
>> That would cause the uclass driver to be missing.
>
> --  Jagan.

Regards,
Simon