linux-kernel - [PATCH v4 1/7] dt-bindings: input: syna,rmi4: Document syna,rmi4-s3706b-i2c

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Message-Id: <20250402-synaptics-rmi4-v4-1-1bb95959e564@ixit.cz>
Date: Wed, 02 Apr 2025 20:44:52 +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, 
 David Heidelberg <david@...t.cz>
Subject: [PATCH v4 1/7] dt-bindings: input: syna,rmi4: Document
 syna,rmi4-s3706b-i2c

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.

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..855614718bfd1c6c41805d64e713cf5635c20f10 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-i2c  # OnePlus 6/6T
+          - const: syna,rmi4-i2c

   reg:
     maxItems: 1

-- 
2.49.0