[PATCH V3] dm: core: Add late driver remove option

Marek Vasut marex at denx.de
Thu Jan 7 13:42:34 CET 2021

On 12/10/20 6:44 PM, Simon Glass wrote:


>>>>> Note also the semantics of what is going on here. The idea of the
>>>>> existing OS_PREPARE and ACTIVE_DMA flags is that the default for
>>>>> device_remove() is to remove everything, but if you provide a flag
>>>>> then it just removes those things. Your flag is the opposite to that,
>>>>> which is why you are changing so much code.
>>>> I obviously cannot remove everything, see the example above.
>>> Do you understand what I am saying about inverting the flag?
>> No, please elaborate.
> The normal situation should be to remove everything. Removing only
> non-late things (which I want to call 'basic', or something like that)
> should be an option, like we have DM_REMOVE_OS_PREPARE.

We cannot remove everything at once, because then various real hardware 
cannot work properly. So there needs to be some way to remove e.g. the 
clock drivers later. Marking a couple of drivers as "remove-late" is 
much less intrusive than marking most drivers as "do-not-remove-early".

How do you propose this "inverted" remove flag would look like ?


More information about the U-Boot mailing list