linux-kernel - [PATCH] dt-bindings: gpio: Convert lantiq,gpio-mm-lantiq to DT schema

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Message-ID: <20250714202837.3011521-1-robh@kernel.org>
Date: Mon, 14 Jul 2025 15:28:35 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	John Crispin <john@...ozen.org>
Cc: linux-gpio@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] dt-bindings: gpio: Convert lantiq,gpio-mm-lantiq to DT schema

Convert the Lantiq SoC External Bus memory mapped GPIO binding to DT
schema format. It's a straight forward conversion.

Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
---
 .../bindings/gpio/gpio-mm-lantiq.txt          | 38 -------------
 .../bindings/gpio/lantiq,gpio-mm-lantiq.yaml  | 54 +++++++++++++++++++
 2 files changed, 54 insertions(+), 38 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/gpio/gpio-mm-lantiq.txt
 create mode 100644 Documentation/devicetree/bindings/gpio/lantiq,gpio-mm-lantiq.yaml

diff --git a/Documentation/devicetree/bindings/gpio/gpio-mm-lantiq.txt b/Documentation/devicetree/bindings/gpio/gpio-mm-lantiq.txt
deleted file mode 100644
index f93d51478d5a..000000000000
--- a/Documentation/devicetree/bindings/gpio/gpio-mm-lantiq.txt
+++ /dev/null
@@ -1,38 +0,0 @@
-Lantiq SoC External Bus memory mapped GPIO controller
-
-By attaching hardware latches to the EBU it is possible to create output
-only gpios. This driver configures a special memory address, which when
-written to outputs 16 bit to the latches.
-
-The node describing the memory mapped GPIOs needs to be a child of the node
-describing the "lantiq,localbus".
-
-Required properties:
-- compatible : Should be "lantiq,gpio-mm-lantiq"
-- reg : Address and length of the register set for the device
-- #gpio-cells : Should be two.  The first cell is the pin number and
-  the second cell is used to specify optional parameters (currently
-  unused).
-- gpio-controller : Marks the device node as a gpio controller.
-
-Optional properties:
-- lantiq,shadow : The default value that we shall assume as already set on the
-  shift register cascade.
-
-Example:
-
-localbus@0 {
-	#address-cells = <2>;
-	#size-cells = <1>;
-	ranges = <0 0 0x0 0x3ffffff /* addrsel0 */
-		1 0 0x4000000 0x4000010>; /* addsel1 */
-	compatible = "lantiq,localbus", "simple-bus";
-
-	gpio_mm0: gpio@...0000 {
-		compatible = "lantiq,gpio-mm";
-		reg = <1 0x0 0x10>;
-		gpio-controller;
-		#gpio-cells = <2>;
-		lantiq,shadow = <0x77f>
-	};
-}
diff --git a/Documentation/devicetree/bindings/gpio/lantiq,gpio-mm-lantiq.yaml b/Documentation/devicetree/bindings/gpio/lantiq,gpio-mm-lantiq.yaml
new file mode 100644
index 000000000000..eaf53a89542a
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/lantiq,gpio-mm-lantiq.yaml
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/lantiq,gpio-mm-lantiq.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Lantiq SoC External Bus memory mapped GPIO controller
+
+maintainers:
+  - John Crispin <john@...ozen.org>
+
+description: |
+  By attaching hardware latches to the EBU it is possible to create output
+  only gpios. This driver configures a special memory address, which when
+  written to outputs 16 bit to the latches.
+
+  The node describing the memory mapped GPIOs needs to be a child of the node
+  describing the "lantiq,localbus".
+
+properties:
+  compatible:
+    enum:
+      - lantiq,gpio-mm-lantiq
+      - lantiq,gpio-mm
+
+  reg:
+    maxItems: 1
+
+  '#gpio-cells':
+    const: 2
+
+  gpio-controller: true
+
+  lantiq,shadow:
+    description: The default value that we shall assume as already set on the shift register cascade.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+required:
+  - compatible
+  - reg
+  - '#gpio-cells'
+  - gpio-controller
+
+additionalProperties: false
+
+examples:
+  - |
+    gpio@...0000 {
+        compatible = "lantiq,gpio-mm-lantiq";
+        reg = <0x4000000 0x10>;
+        gpio-controller;
+        #gpio-cells = <2>;
+        lantiq,shadow = <0x77f>;
+    };
-- 
2.47.2