[U-Boot] [PATCH v2 3/3] common: Generic loader for file system

[Marek Vasut]

On 06/11/2018 03:55 PM, Chee, Tien Fong wrote:
[...]
>>>>> Linux firmware loading method is different with this
>>>>> Linux loading firmware with
>>>>> 1. Firmware search paths - which is hardcoded in root file
>>>>> system
>>>>> 2. Built-in firmware - part of kernel binaries
>>>>>
>>>>> This patch loading firmware with
>>>>> 1. Storage type and partition specified in DTS, but storage
>>>>> type
>>>>> can
>>>>> be overridden dev instance and partition through U-boot
>>>>> variable
>>>>> environment.
>>>>>
>>>>> Or:
>>>>>
>>>>> 2. Storage type can be set through dev instance, and partition
>>>>> through
>>>>> U-boot variable environment. No DTS is required.
>>>> And why can we not do as Linux does ?
>>>>
>>> Because we don't have root file system, but i have mimicked the
>>> search
>>> path in our variable environment, but with both storage type and
>>> partition.
>> OK, so user can configure environment variable to inform U-Boot where
>> to
>> look for firmware, good (although, this probably fails in early env,
>> dunno of that's a problem).
>>
> Without DTS, then you need to configure env variable, so that SPL and
> U-boot only know what storage type and partiton to look for firmware.

I guess that's fine ?

>> But why do we need the DT part of things ? I don't think we do need
>> it
>> at all.
>>
> Leverage the flexibility and benefits of the DT such as changing both
> storage type and partitions without changing the codes. 

DT is a hardware description. Does this describe hardware ? No

-- 
Best regards,
Marek Vasut