[U-Boot] [PATCH 1/3] mtd: rawnand: denali-spl: Add missing hardware init

Marek Vasut marex at denx.de
Tue Nov 26 09:43:19 UTC 2019

On 11/26/19 10:24 AM, Masahiro Yamada wrote:
> On Tue, Nov 26, 2019 at 5:25 PM Marek Vasut <marex at denx.de> wrote:
>> On 11/26/19 3:34 AM, Masahiro Yamada wrote:
>>> On Thu, Nov 21, 2019 at 6:37 AM Marek Vasut wrote:
>>>> While the Denali NAND is initialized by the BootROM in SPL, there
>>>> are still a couple of settings which are missing. These can trigger
>>>> subtle corruption of the data read out of the NAND. Fill these
>>>> settings in just like they are filled in by the full Denali NAND
>>>> driver in denali_hw_init().
>>> I'd like to know this in more detailed.
>>> I assume these registers are set up by the BootROM,
>>> and SPL is supposed to read data in the same manner as the Boot ROM.
>>> In which situation does the data get corrupted?
>> When I boot the board, these registers are not set up correctly. The
>> bootrom reads the SPL fine, but the SPL cannot read U-Boot anymore,
>> probably because the bootrom does something funny to the controller
>> settings.
> Interesting.
> The boot ROM can load SPL from a NAND device,
> but SPL cannot load U-Boot from it in the same manner.
> How did you burn SPL, U-Boot proper, respectively?
> Were they written in different ways?

U-Boot proper, all of it.

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