linux-kernel - [PATCH v6 1/7] dt-bindings: input: syna,rmi4: Document syna,rmi4-s3706b

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Message-Id: <20251113-synaptics-rmi4-v6-1-d9836afab801@ixit.cz>
Date: Thu, 13 Nov 2025 17:30:57 +0100
From: David Heidelberg via B4 Relay <devnull+david.ixit.cz@...nel.org>
To: Kaustabh Chakraborty <kauschluss@...root.org>, 
 Dmitry Torokhov <dmitry.torokhov@...il.com>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, "Jason A. Donenfeld" <Jason@...c4.com>, 
 Matthias Schiffer <matthias.schiffer@...tq-group.com>, 
 Vincent Huang <vincent.huang@...synaptics.com>
Cc: linux-input@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Casey Connolly <casey.connolly@...aro.org>, 
 phone-devel@...r.kernel.org, David Heidelberg <david@...t.cz>, 
 Krzysztof Kozlowski <krzk@...nel.org>
Subject: [PATCH v6 1/7] dt-bindings: input: syna,rmi4: Document
 syna,rmi4-s3706b

From: David Heidelberg <david@...t.cz>

Mostly irrelevant for authentic Synaptics touchscreens, but very important
for applying workarounds to cheap TS knockoffs.

These knockoffs work well with the downstream driver, and since the user
has no way to distinguish them, later in this patch set, we introduce
workarounds to ensure they function as well as possible.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Signed-off-by: David Heidelberg <david@...t.cz>
---
 Documentation/devicetree/bindings/input/syna,rmi4.yaml | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/input/syna,rmi4.yaml b/Documentation/devicetree/bindings/input/syna,rmi4.yaml
index f369385ffaf02..e0e006c9c9ee4 100644
--- a/Documentation/devicetree/bindings/input/syna,rmi4.yaml
+++ b/Documentation/devicetree/bindings/input/syna,rmi4.yaml
@@ -18,9 +18,14 @@ description: |

 properties:
   compatible:
-    enum:
-      - syna,rmi4-i2c
-      - syna,rmi4-spi
+    oneOf:
+      - enum:
+          - syna,rmi4-i2c
+          - syna,rmi4-spi
+      - items:
+          - enum:
+              - syna,rmi4-s3706b  # OnePlus 6/6T
+          - const: syna,rmi4-i2c

   reg:
     maxItems: 1

-- 
2.51.0