Re: [PATCH v8 1/2] dt-bindings: phy: qcom: Add CSI2 C-PHY/DPHY schema

[Vladimir Zapolskiy]

On 6/4/26 00:18, Bryan O'Donoghue wrote:
> On 03/06/2026 21:51, Vladimir Zapolskiy wrote:
> > > Actually, one more thing, Why isn't TITAN TOP GDSC here?>>>> +
> > If CSIPHYs are true subdevices under the umbrella CAMSS device and well
> > described as subnodes, then likely none of power domains are needed to be
> > repeatedly described in the children device nodes, since this information
> > can be obtained from the parent device by the driver.
> >
> > Technically 'power-domains' property can be safely removed, I believe.
>
> The policy is to describe the power-domain dependency fully since DT
> describes hardware not software architecture.

It brings no contardiction to the statement I've given above, the needed
power domans will be properly described in the parent device, and there is no
sense to repeat the properties it again and again in every child subdevice.

> Also for a very practical reason a sub-devices can probe/run
> asynchronously of the parent device being active so in fact we do need
> to describe the PDs fully.

In opposite to the above this one is precisely a software centric argument,
which should be excluded from the consideration, as well it's not a big
deal to make a proper async initialization, removing excessive dt properties
is worth it.

--
Best wishes,
Vladimir