[U-Boot] [PATCH] dm: Add a No-op uclass

[Jean-Jacques Hiblot]

Hi Simon,

On 30/03/2019 22:18, Simon Glass wrote:
> Hi Jean-Jacques,
>
> On Fri, 22 Mar 2019 at 10:44, Jean-Jacques Hiblot <jjhiblot at ti.com> wrote:
>> This uclass is intended for devices that do not need any features from the
>> uclass, including binding children.
>> This will typically be used by devices that are used to bind child devices
>> but do not use dm_scan_fdt_dev() to do it.
>>
> Can you expand this motivation a little? I am not sure why calling
> dm_scan_fdt_dev() would be problematic.

In the case of the USB wrappers, there are 2 children nodes: one for 
peripheral and one for host. The wrapper binds only one of them. 
dm_scan_fdt_dev() would bind both.

>
> Also if you do add a new uclass it should have a sandbox driver and test.

There isn't much to test, except to check that the uclass is present. 
The UCLASS itself does not provide any feature.

JJ

>
> Regards,
> Simon
>