linux-kernel - [PATCH v5 2/3] dt-bindings: arm: bcm: raspberrypi,bcm2835-firmware: Add touchscreen child node

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Message-ID: <20250919075823.2557865-2-dario.binacchi@amarulasolutions.com>
Date: Fri, 19 Sep 2025 09:58:10 +0200
From: Dario Binacchi <dario.binacchi@...rulasolutions.com>
To: linux-kernel@...r.kernel.org
Cc: linux-amarula@...rulasolutions.com,
	Dario Binacchi <dario.binacchi@...rulasolutions.com>,
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>,
	Conor Dooley <conor+dt@...nel.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Eric Anholt <eric@...olt.net>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Ray Jui <rjui@...adcom.com>,
	Rob Herring <robh@...nel.org>,
	Scott Branden <sbranden@...adcom.com>,
	Stefan Wahren <wahrenst@....net>,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-input@...r.kernel.org,
	linux-rpi-kernel@...ts.infradead.org
Subject: [PATCH v5 2/3] dt-bindings: arm: bcm: raspberrypi,bcm2835-firmware: Add touchscreen child node

Convert Raspberry Pi firmware 7" touchscreen controller device tree
binding to json-schema.

Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com>

---

Changes in v5:
- Move bindings into raspberrypi,bcm2835-firmware.yaml
- Remove raspberrypi,firmware-ts.yaml
- Update the commit message

Changes in v3:
- Drop firmware-rpi node and use only touchscreen node to fix warnings
  you can see in
  https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20250913092707.1005616-3-dario.binacchi@amarulasolutions.com/

Changes in v2:
- Added in v2

 .../arm/bcm/raspberrypi,bcm2835-firmware.yaml | 27 +++++++++++++++++++
 .../touchscreen/raspberrypi,firmware-ts.txt   | 26 ------------------
 2 files changed, 27 insertions(+), 26 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/input/touchscreen/raspberrypi,firmware-ts.txt

diff --git a/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml b/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
index 1f84407a73e4..044544c17e8e 100644
--- a/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
+++ b/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
@@ -103,6 +103,27 @@ properties:
       - compatible
       - "#pwm-cells"
 
+  touchscreen:
+    type: object
+    additionalProperties: false
+
+    properties:
+      compatible:
+        const: raspberrypi,firmware-ts
+
+      firmware:
+        deprecated: true
+        description: Phandle to RPi's firmware device node.
+
+      touchscreen-size-x: true
+      touchscreen-size-y: true
+      touchscreen-inverted-x: true
+      touchscreen-inverted-y: true
+      touchscreen-swapped-x-y: true
+
+    required:
+      - compatible
+
 required:
   - compatible
   - mboxes
@@ -135,5 +156,11 @@ examples:
             compatible = "raspberrypi,firmware-poe-pwm";
             #pwm-cells = <2>;
         };
+
+        ts: touchscreen {
+            compatible = "raspberrypi,firmware-ts";
+            touchscreen-size-x = <800>;
+            touchscreen-size-y = <480>;
+        };
     };
 ...
diff --git a/Documentation/devicetree/bindings/input/touchscreen/raspberrypi,firmware-ts.txt b/Documentation/devicetree/bindings/input/touchscreen/raspberrypi,firmware-ts.txt
deleted file mode 100644
index 2a1af240ccc3..000000000000
--- a/Documentation/devicetree/bindings/input/touchscreen/raspberrypi,firmware-ts.txt
+++ /dev/null
@@ -1,26 +0,0 @@
-Raspberry Pi firmware based 7" touchscreen
-=====================================
-
-Required properties:
- - compatible: "raspberrypi,firmware-ts"
-
-Optional properties:
- - firmware: Reference to RPi's firmware device node
- - touchscreen-size-x: See touchscreen.txt
- - touchscreen-size-y: See touchscreen.txt
- - touchscreen-inverted-x: See touchscreen.txt
- - touchscreen-inverted-y: See touchscreen.txt
- - touchscreen-swapped-x-y: See touchscreen.txt
-
-Example:
-
-firmware: firmware-rpi {
-	compatible = "raspberrypi,bcm2835-firmware";
-	mboxes = <&mailbox>;
-
-	ts: touchscreen {
-		compatible = "raspberrypi,firmware-ts";
-		touchscreen-size-x = <800>;
-		touchscreen-size-y = <480>;
-	};
-};
-- 
2.43.0

base-commit: 8b789f2b7602a818e7c7488c74414fae21392b63
branch: drop-touchscreen.txt