Re: [PATCH v6 32/52] memory: tegra20-emc: Continue probing if timings are missing in device-tree

Dmitry Osipenko
2020-10-27T19:39:02Z

27.10.2020 16:52, Thierry Reding пишет:
> On Mon, Oct 26, 2020 at 01:17:15AM +0300, Dmitry Osipenko wrote:
>> EMC driver will become mandatory after turning it into interconnect
>> provider because interconnect users, like display controller driver, will
>> fail to probe using newer device-trees that have interconnect properties.
>> Thus make EMC driver to probe even if timings are missing in device-tree.
>
> Does it really have to be mandatory? Sounds like that's going to make it
> unnecessarily complicated to merge all of this. Is it complicated to
> make interconnect support optional in consumer drivers?

Interconnect provider can't be optional if interconnect properties
present in a device-tree because drivers that use ICC path will get
-EPROBE_DEFER until ICC provider is registered.

Older device-trees don't have ICC properties, and thus, the ICC
users/consumers will get a dummy NULL ICC path in this case. I.e. ICC
core handles this for us.