linux-kernel - Re: [PATCH v2 1/3] dt-bindings: chrome: Add Cros EC UCSI driver

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Message-ID: <CAMFSARfvBQrwdeeCaBbqF++HGNyAza40usFLtAoij4Y52r64aA@mail.gmail.com>
Date: Wed, 8 Oct 2025 13:25:16 -0700
From: Jameson Thies <jthies@...gle.com>
To: Rob Herring <robh@...nel.org>
Cc: akuchynski@...omium.org, abhishekpandit@...omium.org, krzk+dt@...nel.org, 
	bleung@...omium.org, heikki.krogerus@...ux.intel.com, ukaszb@...omium.org, 
	tzungbi@...nel.org, devicetree@...r.kernel.org, 
	chrome-platform@...ts.linux.dev, linux-usb@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/3] dt-bindings: chrome: Add Cros EC UCSI driver

> What's PDC? What's UCSI?

PDCs are "Power Delivery Controllers". It refers to an IC which
manages PD communication for a USB-C port. UCSI stands for "USB Type-C
Connector System Software Interface". It is a specification maintained
by the USB-IF which defines a standardized interface for communicating
with PDCs. I'll update the description in the v3 series to provide the
full name for both of these terms.

> This is the exact same binding as google,cros-ec-typec.yaml. Why are you
> duplicating the whole thing rather than just adding a new compatible
> string?

I separated these bindings because they are associated with separate
mutually exclusive drivers. But, I'm fine with adding this as a
compatibility string in google,cros-ec-typec.yaml and will make that
change in the v3 series.