linux-kernel - [PATCH 1/1] dt-bindings: input: convert lpc32xx-key.txt to yaml format

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Message-Id: <20250624200659.2514584-1-Frank.Li@nxp.com>
Date: Tue, 24 Jun 2025 16:06:58 -0400
From: Frank Li <Frank.Li@....com>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Vladimir Zapolskiy <vz@...ia.com>,
	Piotr Wojtaszczyk <piotr.wojtaszczyk@...esys.com>,
	linux-input@...r.kernel.org (open list:INPUT (KEYBOARD, MOUSE, JOYSTICK, TOUCHSCREEN)...),
	devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS),
	linux-arm-kernel@...ts.infradead.org (moderated list:ARM/LPC32XX SOC SUPPORT),
	linux-kernel@...r.kernel.org (open list)
Cc: imx@...ts.linux.dev
Subject: [PATCH 1/1] dt-bindings: input: convert lpc32xx-key.txt to yaml format

Convert lpc32xx-key.txt to yaml format.

Additional changes:
- set maximum of key-row(column) to 4.

Signed-off-by: Frank Li <Frank.Li@....com>
---
 .../devicetree/bindings/input/lpc32xx-key.txt | 34 ----------
 .../bindings/input/nxp,lpc3220-key.yaml       | 66 +++++++++++++++++++
 2 files changed, 66 insertions(+), 34 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/input/lpc32xx-key.txt
 create mode 100644 Documentation/devicetree/bindings/input/nxp,lpc3220-key.yaml

diff --git a/Documentation/devicetree/bindings/input/lpc32xx-key.txt b/Documentation/devicetree/bindings/input/lpc32xx-key.txt
deleted file mode 100644
index 2b075a080d303..0000000000000
--- a/Documentation/devicetree/bindings/input/lpc32xx-key.txt
+++ /dev/null
@@ -1,34 +0,0 @@
-NXP LPC32xx Key Scan Interface
-
-This binding is based on the matrix-keymap binding with the following
-changes:
-
-Required Properties:
-- compatible: Should be "nxp,lpc3220-key"
-- reg: Physical base address of the controller and length of memory mapped
-  region.
-- interrupts: The interrupt number to the cpu.
-- clocks: phandle to clock controller plus clock-specifier pair
-- nxp,debounce-delay-ms: Debounce delay in ms
-- nxp,scan-delay-ms: Repeated scan period in ms
-- linux,keymap: the key-code to be reported when the key is pressed
-  and released, see also
-  Documentation/devicetree/bindings/input/matrix-keymap.txt
-
-Note: keypad,num-rows and keypad,num-columns are required, and must be equal
-since LPC32xx only supports square matrices
-
-Example:
-
-	key@...50000 {
-		compatible = "nxp,lpc3220-key";
-		reg = <0x40050000 0x1000>;
-		clocks = <&clk LPC32XX_CLK_KEY>;
-		interrupt-parent = <&sic1>;
-		interrupts = <22 IRQ_TYPE_LEVEL_HIGH>;
-		keypad,num-rows = <1>;
-		keypad,num-columns = <1>;
-		nxp,debounce-delay-ms = <3>;
-		nxp,scan-delay-ms = <34>;
-		linux,keymap = <0x00000002>;
-	};
diff --git a/Documentation/devicetree/bindings/input/nxp,lpc3220-key.yaml b/Documentation/devicetree/bindings/input/nxp,lpc3220-key.yaml
new file mode 100644
index 0000000000000..5ab6cefd35fa3
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/nxp,lpc3220-key.yaml
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/nxp,lpc3220-key.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP LPC32xx Key Scan Interface
+
+maintainers:
+  - Frank Li <Frank.Li@....com>
+
+properties:
+  compatible:
+    const: nxp,lpc3220-key
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  keypad,num-rows:
+    maximum: 4
+
+  keypad,num-columns:
+    maximum: 4
+
+  nxp,debounce-delay-ms:
+    description: Debounce delay in ms
+
+  nxp,scan-delay-ms:
+    description: Repeated scan period in ms
+
+  linux,keymap: true
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - nxp,debounce-delay-ms
+  - nxp,scan-delay-ms
+  - linux,keymap
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/clock/lpc32xx-clock.h>
+
+    key@...50000 {
+        compatible = "nxp,lpc3220-key";
+        reg = <0x40050000 0x1000>;
+        clocks = <&clk LPC32XX_CLK_KEY>;
+        interrupt-parent = <&sic1>;
+        interrupts = <22 IRQ_TYPE_LEVEL_HIGH>;
+        keypad,num-rows = <1>;
+        keypad,num-columns = <1>;
+        nxp,debounce-delay-ms = <3>;
+        nxp,scan-delay-ms = <34>;
+        linux,keymap = <0x00000002>;
+    };
-- 
2.34.1