linux-kernel - [PATCH v5 1/7] dt-bindings: input: syna,rmi4: Document syna,rmi4-s3706b

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Message-Id: <20250410-synaptics-rmi4-v5-1-b41bb90f78b9@ixit.cz>
Date: Thu, 10 Apr 2025 16:28:19 +0200
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, Caleb Connolly <caleb.connolly@...aro.org>, 
 phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht, 
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>, 
 David Heidelberg <david@...t.cz>
Subject: [PATCH v5 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 b522c8d3ce0db719ff379f2fefbdca79e73d027c..d5d0225e3826fa5a0559cbd99115c505ab113aa0 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

-- 
2.49.0