[PATCH] power-domain: fix hang in endless loop on i.MX8

[Anatolij Gustschin <agust@denx.de>]

Hi Simon, Peng,

On Sun, 16 Feb 2020 12:02:55 -0700
Simon Glass sjg at chromium.org wrote:
...
> >  drivers/power/domain/power-domain-uclass.c | 12 ++++++++++++
> >  1 file changed, 12 insertions(+)  
> 
> Can we have a sandbox test for this case?

I didn't check if there are more platforms with such parent & child
power domain devices in U-Boot. If there are some, then it makes
sense to add a test. But for this i.MX8 case we will probably switch
to another power domain bindings and driver like in Linux (we have
to sync i.MX8 device trees with current Linux implementation which
is different and it doesn't have such parent/child PD devices).

The current i.MX8 PD U-Boot implementation seems wrong anyway, here
the parent power domain devices for dma, connectivity or lsio domains
actually do not control power switching, so there is no need to have
such parent&child PD devices on i.MX8.

@Peng: what do you think?

--
Anatolij