On Fri, Oct 30, 2020 at 04:27:14PM +0100, Amelie DELAUNAY wrote:

On 10/30/20 3:29 PM, Rob Herring wrote:

quoted

On Thu, Oct 29, 2020 at 11:49 AM Amelie DELAUNAY [off-list ref] wrote:

quoted

On 10/29/20 4:40 PM, Rob Herring wrote:

quoted

On Thu, Oct 29, 2020 at 10:58:03AM +0100, Amelie Delaunay wrote:

quoted

Power operation mode may depends on hardware design, so, add the optional
property power-opmode for usb-c connector to select the power operation
mode capability.

Signed-off-by: Amelie Delaunay <redacted>
---
   .../bindings/connector/usb-connector.yaml      | 18 ++++++++++++++++++
   1 file changed, 18 insertions(+)

diff --git a/Documentation/devicetree/bindings/connector/usb-connector.yaml b/Documentation/devicetree/bindings/connector/usb-connector.yaml
index 728f82db073d..200d19c60fd5 100644
--- a/Documentation/devicetree/bindings/connector/usb-connector.yaml
+++ b/Documentation/devicetree/bindings/connector/usb-connector.yaml

@@ -93,6 +93,24 @@ properties:
         - device
         - dual

+  power-opmode:

I've acked this version:

https://lore.kernel.org/r/20201020093627.256885-2-badhri@google.com (local)

frs is used for Fast Role Swap defined in USB PD spec.
I understand it allows to get the same information but I'm wondering why
the property name is limited to -frs- in this case. What about a
non-power delivery USB-C connector ?

I've got no idea. The folks that know USB-C and PD details need to get
together and work all this out. To me, it looks like the same thing...

It looks but...

The purpose of power-opmode property is to configure the USB-C controllers,
especially the non-PD USB-C controllers to determine the power operation
mode that the Type C connector will support and will advertise through CC
pins when it has no power delivery support, whatever the power role: Sink,
Source or Dual
The management of the property is the same that data-role and power-role
properties, and done by USB Type-C Connector Class.

new-source-frs-typec-current specifies initial current capability of the new
source when vSafe5V is applied during PD3.0 Fast Role Swap. So here, this
property is not applied at usb-c controller configuration level, but during
PD Fast Role Swap, so when the Sink become the Source.
Moreover, the related driver code says FRS can only be supported by DRP
ports. So new-source-frs-typec-current property, in addition to being
specific to PD, is also dedicated to DRP usb-c controller.
The property is managed by Type-C Port Controller Manager for PD.

But it's the same set of possible values, right? So we can align the 
values at least.

Can we align the names in some way? power-opmode and frs-source-opmode 
or ??

Are these 2 properties mutually exclusive? If so, that should be 
captured.

Rob

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