linux-kernel - [PATCH v3 1/3] dt-bindings: chrome: Add cros-ec-ucsi compatibility to typec binding

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Message-ID: <20251009010312.2203812-2-jthies@google.com>
Date: Thu,  9 Oct 2025 01:03:06 +0000
From: Jameson Thies <jthies@...gle.com>
To: akuchynski@...omium.org, abhishekpandit@...omium.org, krzk+dt@...nel.org, 
	robh@...nel.org, bleung@...omium.org, heikki.krogerus@...ux.intel.com, 
	ukaszb@...omium.org, tzungbi@...nel.org
Cc: devicetree@...r.kernel.org, chrome-platform@...ts.linux.dev, 
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Jameson Thies <jthies@...gle.com>
Subject: [PATCH v3 1/3] dt-bindings: chrome: Add cros-ec-ucsi compatibility to
 typec binding

Chrome OS devices with discrete power delivery controllers (PDCs) allow
the host to read port status and control port behavior through a USB
Type-C Connector System Software (UCSI) interface with the embedded
controller (EC). This uses a separate interface driver than other
Chrome OS devices with a Type-C port manager in the EC FW. Those use
a host command interface supported by cros-ec-typec. Add a cros-ec-ucsi
compatibility string to the existing cros-ec-typec binding.

Additionally, update maintainer list to reflect cros-ec-ucsi and
cros-ec-typec driver maintainers.

Signed-off-by: Jameson Thies <jthies@...gle.com>
---
 .../bindings/chrome/google,cros-ec-typec.yaml | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/chrome/google,cros-ec-typec.yaml b/Documentation/devicetree/bindings/chrome/google,cros-ec-typec.yaml
index 9f9816fbecbc..fd1a459879bd 100644
--- a/Documentation/devicetree/bindings/chrome/google,cros-ec-typec.yaml
+++ b/Documentation/devicetree/bindings/chrome/google,cros-ec-typec.yaml
@@ -8,17 +8,28 @@ title: Google Chrome OS EC(Embedded Controller) Type C port driver.
 
 maintainers:
   - Benson Leung <bleung@...omium.org>
-  - Prashant Malani <pmalani@...omium.org>
+  - Abhishek Pandit-Subedi <abhishekpandit@...omium.org>
+  - Andrei Kuchynski <akuchynski@...omium.org>
+  - Łukasz Bartosik <ukaszb@...omium.org>
+  - Jameson Thies <jthies@...gle.com>
 
 description:
   Chrome OS devices have an Embedded Controller(EC) which has access to
   Type C port state. This node is intended to allow the host to read and
-  control the Type C ports. The node for this device should be under a
-  cros-ec node like google,cros-ec-spi.
+  control the Type C ports. This binding is compatible with both the
+  cros-ec-typec and cros-ec-ucsi drivers. The cros-ec-typec driver
+  supports the host command interface used by the Chrome OS EC with a
+  built-in Type-C port manager and external Type-C Port Controller
+  (TCPC). The cros-ec-ucsi driver supports the USB Type-C Connector
+  System Software (UCSI) interface used by the Chrome OS EC when the
+  platform has a separate power delivery controller (PDC). The node for
+  this device should be under a cros-ec node like google,cros-ec-spi.
 
 properties:
   compatible:
-    const: google,cros-ec-typec
+    enum:
+      - google,cros-ec-typec
+      - google,cros-ec-ucsi
 
   '#address-cells':
     const: 1
-- 
2.51.0.710.ga91ca5db03-goog