linux-kernel - [PATCH v1] dt-bindings: input: Add TouchNetix aXiom touchscreen driver

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Message-ID: <20260122144052.358956-1-andrew.thomas@touchnetix.com>
Date: Thu, 22 Jan 2026 14:40:52 +0000
From: AThomas63 <andrew.thomas@...chnetix.com>
To: dmitry.torokhov@...il.com
CC: linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	mark.satterthwaite@...chnetix.com,
	andrew.thomas@...chnetix.com,
	m.felsch@...gutronix.de,
	kamel.bouhara@...tlin.com
Subject: [PATCH v1] dt-bindings: input: Add TouchNetix aXiom touchscreen driver

Add extra changes referenced in the previous patch:
 - Add device tree documentation for axiom giving examples for SPI and I2C.
 - Add tnx vendor prefix.

---
 .../bindings/input/touchscreen/tnx,axiom.yaml | 90 +++++++++++++++++++
 .../devicetree/bindings/vendor-prefixes.yaml  |  2 +
 2 files changed, 92 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/touchscreen/tnx,axiom.yaml

diff --git a/Documentation/devicetree/bindings/input/touchscreen/tnx,axiom.yaml b/Documentation/devicetree/bindings/input/touchscreen/tnx,axiom.yaml
new file mode 100644
index 000000000000..dc2ea62999b8
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/tnx,axiom.yaml
@@ -0,0 +1,90 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/touchscreen/tnx,axiom.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TouchNetix aXiom Touchscreen Controller
+
+maintainers:
+  - Andrew Thomas <andrew.thomas@...chnetix.com>
+
+description: |
+  The TouchNetix aXiom series are high-performance touchscreen controllers
+  supporting various interface methods including I2C and SPI.
+
+properties:
+  compatible:
+    enum:
+      - tnx,axiom-i2c
+      - tnx,axiom-spi
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  axiom,poll-enable:
+    type: boolean
+    description: Enable aXiom polling mode instead of interrupt-driven 
+      reporting.
+
+  axiom,poll-period:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 10
+    description: Set the polling period in milliseconds.
+
+  # Required for SPI
+  spi-max-frequency: true
+
+  # Common touchscreen properties
+  touchscreen-size-x: true
+  touchscreen-size-y: true
+  touchscreen-inverted-x: true
+  touchscreen-inverted-y: true
+  touchscreen-swapped-x-y: true
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+allOf:
+  - $ref: touchscreen.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        touchscreen@66 {
+            compatible = "touchnetix,axiom-i2c";
+            reg = <0x66>;
+            interrupt-parent = <&gpio>;
+            interrupts = <24 IRQ_TYPE_LEVEL_LOW>;
+            axiom,poll-enable;
+            axiom,poll-period = <15>;
+        };
+    };
+
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        touchscreen@0 {
+            compatible = "touchnetix,axiom-spi";
+            reg = <0>;
+            spi-max-frequency = <4000000>;
+            interrupt-parent = <&gpio>;
+            interrupts = <24 IRQ_TYPE_LEVEL_LOW>;
+        };
+    };
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index f1d1882009ba..dadfc7036ed7 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -1636,6 +1636,8 @@ patternProperties:
     description: Trusted Logic Mobility
   "^tmt,.*":
     description: Tecon Microprocessor Technologies, LLC.
+  "^tnx,.*":
+    description: TouchNetix
   "^topeet,.*":
     description: Topeet
   "^topic,.*":
-- 
2.43.0