linux-kernel - [PATCH v4 1/2] dt-bindings: connector: Add child nodes for multiple PD capabilities

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Message-ID: <20231204172247.1087152-2-kyletso@google.com>
Date:   Tue,  5 Dec 2023 01:22:46 +0800
From:   Kyle Tso <kyletso@...gle.com>
To:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, linux@...ck-us.net,
        heikki.krogerus@...ux.intel.com, gregkh@...uxfoundation.org
Cc:     badhri@...gle.com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        Kyle Tso <kyletso@...gle.com>
Subject: [PATCH v4 1/2] dt-bindings: connector: Add child nodes for multiple
 PD capabilities

The realtime Power Delivery capabilities of a port may not be always the
same under different hardware status such as the port usage of a
multiple port system or the status of the battery pack. Define the PD
capability sets in DT for better configurability in Type-C/PD port
drivers.

Define an optional child node "capabilities" to contain multiple USB
Power Delivery capabilities.

Define child nodes with pattern (e.g. caps-0, caps-1) under
"capabilities". Each node contains PDO data of a selectable Power
Delivery capability.

Also define common properties for source-pdos, sink-pdos, and
op-sink-microwatt that can be referenced.

Signed-off-by: Kyle Tso <kyletso@...gle.com>
---
v3 -> v4
 - modified the structure of the bindings as corrected in v2
 - modified the commit message to better describe the reason of this
   change

.../bindings/connector/usb-connector.yaml     | 78 ++++++++++++-------
 1 file changed, 49 insertions(+), 29 deletions(-)

diff --git a/Documentation/devicetree/bindings/connector/usb-connector.yaml b/Documentation/devicetree/bindings/connector/usb-connector.yaml
index 7c8a3e8430d3..50fec97436d8 100644
--- a/Documentation/devicetree/bindings/connector/usb-connector.yaml
+++ b/Documentation/devicetree/bindings/connector/usb-connector.yaml
@@ -14,6 +14,8 @@ description:
   of a USB interface controller or a separate node when it is attached to both
   MUX and USB interface controller.
 
+$ref: "#/$defs/capabilities"
+
 properties:
   compatible:
     oneOf:
@@ -119,30 +121,6 @@ properties:
 
   # The following are optional properties for "usb-c-connector" with power
   # delivery support.
-  source-pdos:
-    description: An array of u32 with each entry providing supported power
-      source data object(PDO), the detailed bit definitions of PDO can be found
-      in "Universal Serial Bus Power Delivery Specification" chapter 6.4.1.2
-      Source_Capabilities Message, the order of each entry(PDO) should follow
-      the PD spec chapter 6.4.1. Required for power source and power dual role.
-      User can specify the source PDO array via PDO_FIXED/BATT/VAR/PPS_APDO()
-      defined in dt-bindings/usb/pd.h.
-    minItems: 1
-    maxItems: 7
-    $ref: /schemas/types.yaml#/definitions/uint32-array
-
-  sink-pdos:
-    description: An array of u32 with each entry providing supported power sink
-      data object(PDO), the detailed bit definitions of PDO can be found in
-      "Universal Serial Bus Power Delivery Specification" chapter 6.4.1.3
-      Sink Capabilities Message, the order of each entry(PDO) should follow the
-      PD spec chapter 6.4.1. Required for power sink and power dual role. User
-      can specify the sink PDO array via PDO_FIXED/BATT/VAR/PPS_APDO() defined
-      in dt-bindings/usb/pd.h.
-    minItems: 1
-    maxItems: 7
-    $ref: /schemas/types.yaml#/definitions/uint32-array
-
   sink-vdos:
     description: An array of u32 with each entry, a Vendor Defined Message Object (VDO),
       providing additional information corresponding to the product, the detailed bit
@@ -166,11 +144,6 @@ properties:
     maxItems: 6
     $ref: /schemas/types.yaml#/definitions/uint32-array
 
-  op-sink-microwatt:
-    description: Sink required operating power in microwatt, if source can't
-      offer the power, Capability Mismatch is set. Required for power sink and
-      power dual role.
-
   port:
     $ref: /schemas/graph.yaml#/properties/port
     description: OF graph bindings modeling a data bus to the connector, e.g.
@@ -231,6 +204,21 @@ properties:
       SNK_READY for non-pd link.
     type: boolean
 
+  capabilities:
+    description: A child node to contain all the selectable USB Power Delivery capabilities.
+    type: object
+
+    patternProperties:
+      "^caps-[0-9]+$":
+        description: Child nodes under "capabilities" node. Each node contains a selectable USB
+          Power Delivery capability.
+        type: object
+        $ref: "#/$defs/capabilities"
+
+        unevaluatedProperties: false
+
+    additionalProperties: false
+
 dependencies:
   sink-vdos-v1: [ sink-vdos ]
   sink-vdos: [ sink-vdos-v1 ]
@@ -238,6 +226,38 @@ dependencies:
 required:
   - compatible
 
+$defs:
+  capabilities:
+    properties:
+      source-pdos:
+        description: An array of u32 with each entry providing supported power
+          source data object(PDO), the detailed bit definitions of PDO can be found
+          in "Universal Serial Bus Power Delivery Specification" chapter 6.4.1.2
+          Source_Capabilities Message, the order of each entry(PDO) should follow
+          the PD spec chapter 6.4.1. Required for power source and power dual role.
+          User can specify the source PDO array via PDO_FIXED/BATT/VAR/PPS_APDO()
+          defined in dt-bindings/usb/pd.h.
+        minItems: 1
+        maxItems: 7
+        $ref: /schemas/types.yaml#/definitions/uint32-array
+
+    sink-pdos:
+      description: An array of u32 with each entry providing supported power sink
+        data object(PDO), the detailed bit definitions of PDO can be found in
+        "Universal Serial Bus Power Delivery Specification" chapter 6.4.1.3
+        Sink Capabilities Message, the order of each entry(PDO) should follow the
+        PD spec chapter 6.4.1. Required for power sink and power dual role. User
+        can specify the sink PDO array via PDO_FIXED/BATT/VAR/PPS_APDO() defined
+        in dt-bindings/usb/pd.h.
+      minItems: 1
+      maxItems: 7
+      $ref: /schemas/types.yaml#/definitions/uint32-array
+
+    op-sink-microwatt:
+      description: Sink required operating power in microwatt, if source can't
+        offer the power, Capability Mismatch is set. Required for power sink and
+        power dual role.
+
 allOf:
   - if:
       properties:
-- 
2.43.0.rc2.451.g8631bc7472-goog