On 22/03/2024 15:09, neil.armstrong@xxxxxxxxxx wrote:
TBH I think we should drop this HS, SS stuff from the connector
definition - there's nothing to say in a h/w definition anywhere HS
must be a port or indeed SS - not all hardware knows or cares about
different HS/SS signalling.
It matches the USB-C connector electrical characteristics, which by spec
has, at least:
- High-Speed USB Line
- up to 4 differential high-speed lanes that can be switched to DP, USB2
or PCIe
- SideBand line (SBU)
And those 3 components can be handled by 3 different HW in the SoC, so
each one has a dedicated port.
Remember DT describes the HW, not the SW implementation.
Neil
Yes, you're right about that.
I suppose
1. Orientation switches should be defined as coming from a port on the
connector associated with the CC pins.
port@3:
orientation-switch port name goes here
2. Data-role switches...
Again the CC pins
https://community.silabs.com/s/article/what-s-the-role-of-cc-pin-in-type-c-solution?language=en_US
Maybe the right-thing-to-do is to add another port for the CC pins -
which would still describe the hardware characteristics but would
_accurately_ name the thing which does the data-role/orientation switching
CC1/CC2
Then we would not be abusing HS/SS/SBU for the port names - we'd be
extending the connector definition but also naming the ports/endpoints
appropriately associated with the data over the hw
---
bod
