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Date:   Wed, 13 Jan 2021 17:25:12 -0800
From:   Philip Chen <philipchen@...omium.org>
To:     LKML <linux-kernel@...r.kernel.org>, dmitry.torokhov@...il.com
Cc:     dianders@...omium.org, swboyd@...omium.org,
        Philip Chen <philipchen@...omium.org>,
        Benson Leung <bleung@...omium.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Guenter Roeck <groeck@...omium.org>,
        Rob Herring <robh+dt@...nel.org>,
        Simon Glass <sjg@...omium.org>, devicetree@...r.kernel.org,
        linux-input@...r.kernel.org
Subject: [PATCH v5 1/2] dt-bindings: input: cros-ec-keyb: Add a new property

This patch adds a new property `function-row-physmap` to the
device tree for the custom keyboard top row design.

The property describes the rows/columns of the top row keys
from left to right.

Signed-off-by: Philip Chen <philipchen@...omium.org>
---

Changes in v5:
- add minItems and maxItems for `function-row-physmap`

Changes in v2:
- add `function-row-physmap` instead of `google,custom-keyb-top-row`

 .../bindings/input/google,cros-ec-keyb.yaml          | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Documentation/devicetree/bindings/input/google,cros-ec-keyb.yaml b/Documentation/devicetree/bindings/input/google,cros-ec-keyb.yaml
index 8e50c14a9d778..e573ef3e58b65 100644
--- a/Documentation/devicetree/bindings/input/google,cros-ec-keyb.yaml
+++ b/Documentation/devicetree/bindings/input/google,cros-ec-keyb.yaml
@@ -31,6 +31,18 @@ properties:
       if the EC does not have its own logic or hardware for this.
     type: boolean
 
+  function-row-physmap:
+    $ref: '/schemas/types.yaml#/definitions/uint32-array'
+    minItems: 1
+    maxItems: 15
+    description: |
+      An ordered u32 array describing the rows/columns (in the scan matrix)
+      of top row keys from physical left (KEY_F1) to right. Each entry
+      encodes the row/column as:
+      (((row) & 0xFF) << 24) | (((column) & 0xFF) << 16)
+      where the lower 16 bits are reserved. This property is specified only
+      when the keyboard has a custom design for the top row keys.
+
 required:
   - compatible
 
-- 
2.26.2

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