Hi Caleb,
There are two types of platforms, some use extcon and some use
role-switch to deliver vbus/id notifications. Extcon targets already
have this qscratch modifications present today in vbus and id handlers.
But for role-switch based targets we don't have any way to get this
notification to dwc3-qcom. In this implementation, I wanted to get those
notications from core to glue and for this we implenented vendor hooks.
The property added has been used to do two things:
1. Register glue's vendor hooks to core driver
2. Do runtime_allow for glue (and by default for core as the dt is not
flattened)
In case of extcon, we don't want to register vendor hooks as
notifications are not necessary.
Could it just be enabled when role_switch is present then?
For xhci, we opted to enable runtime from userspace.
HS/FS/LS modes are supported.
type: boolean
+ qcom,enable-rt:
+ description:
+ If present, register vendor hooks to facilitate runtime
suspend/resume
+ type: boolean
A Krzysztof pointed out, properties should define the hardware
behaviour, not tot the implementation details. For this case the
hardware isn't wired up to vbus, so maybe something like "qcom,no-vbus"?
+
On all targets, vbus is not routed to hardware. This vbus toggle
indication is given to controller via qscratch only.
Regards,
Krishna,
--
// Caleb (they/them)
