[PATCH v1 1/2] dt-bindings: chrome: Add cros-ec-ucsi compatibility to typec binding

Jameson Thies
2026-04-03T22:34:18Z

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@google.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@chromium.org>
- - Prashant Malani <pmalani@chromium.org>
+ - Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
+ - Andrei Kuchynski <akuchynski@chromium.org>
+ - Łukasz Bartosik <ukaszb@chromium.org>
+ - Jameson Thies <jthies@google.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
--
2.53.0.1213.gd9a14994de-goog