linux-kernel - [PATCH v3 1/2] dt-bindings: chrome: Add cros-ec-typec mux props

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Date:   Tue, 19 May 2020 14:46:02 -0700
From:   Prashant Malani <pmalani@...omium.org>
To:     linux-kernel@...r.kernel.org, robh+dt@...nel.org
Cc:     heikki.krogerus@...ux.intel.com,
        Prashant Malani <pmalani@...omium.org>,
        Benson Leung <bleung@...omium.org>,
        devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE BINDINGS),
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Guenter Roeck <groeck@...omium.org>
Subject: [PATCH v3 1/2] dt-bindings: chrome: Add cros-ec-typec mux props

Add properties for mode, orientation and USB data role switches for
Type C connectors. When available, these will allow the Type C connector
class port driver to configure the various switches according to USB PD
information (like orientation, alt mode etc.) provided by the Chrome OS
EC controller.

Signed-off-by: Prashant Malani <pmalani@...omium.org>
Acked-by: Benson Leung <bleung@...omium.org>
---

Changes in v3:
- Fixed Acked-by tag typo.

Changes in v2:
- Added more text to the switch descriptions, explaining their purpose,
  and relation to the Type C connector class framework.

 .../bindings/chrome/google,cros-ec-typec.yaml | 40 ++++++++++++++++++-
 1 file changed, 39 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/chrome/google,cros-ec-typec.yaml b/Documentation/devicetree/bindings/chrome/google,cros-ec-typec.yaml
index 6d7396ab8bee..800c005a0e44 100644
--- a/Documentation/devicetree/bindings/chrome/google,cros-ec-typec.yaml
+++ b/Documentation/devicetree/bindings/chrome/google,cros-ec-typec.yaml
@@ -21,7 +21,34 @@ properties:
     const: google,cros-ec-typec
 
   connector:
-    $ref: /schemas/connector/usb-connector.yaml#
+    allOf:
+      - $ref: /schemas/connector/usb-connector.yaml#
+      - type: object
+        properties:
+          mode-switch:
+            description: Reference to a DT node for the USB Type C Multiplexer
+              for this connector. This switch controls the data lines routing
+              for this connector for various operation modes, including
+              Alternate Modes. This switch is assumed registered with the Type C
+              connector class framework by its driver. The Type C connector
+              class framework assumes that the mode switch property uses this
+              name.
+
+          orientation-switch:
+            description: Reference to a DT node for the USB Type C orientation
+              switch for this connector. This switch controls routing the
+              correct data pairs depending on the cable plug orientation from
+              this connector to the USB / Alternate Mode controllers. This
+              switch is assumed registered with the Type C connector class
+              framework by its driver. The Type C connector class framework
+              assumes that the orientation switch property uses this name.
+
+          usb-role-switch:
+            description: Reference to a DT node for the USB Data role switch
+              for this connector. This switch is assumed registered with the
+              Type C connector class framework by its driver. The Type C
+              connector class framework assumes that the USB role switch
+              property uses this name.
 
 required:
   - compatible
@@ -49,6 +76,17 @@ examples:
             data-role = "dual";
             try-power-role = "source";
           };
+
+          connector@1 {
+            compatible = "usb-c-connector";
+            reg = <1>;
+            power-role = "dual";
+            data-role = "host";
+            try-power-role = "source";
+            mode-switch = <&typec_mux>;
+            orientation-switch = <&typec_orientation_switch>;
+            usb-role-switch = <&typec_mux>;
+          };
         };
       };
     };
-- 
2.26.2.761.g0e0b3e54be-goog