linux-kernel - [PATCH v5 01/14] dt-bindings: trigger-source: add generic GPIO trigger source

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Message-ID: <414f5b60b81f87f99b4e18b9a55eb51f29d2225a.1744325346.git.Jonathan.Santos@analog.com>
Date: Fri, 11 Apr 2025 12:56:04 -0300
From: Jonathan Santos <Jonathan.Santos@...log.com>
To: <linux-iio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-gpio@...r.kernel.org>
CC: Jonathan Santos <Jonathan.Santos@...log.com>, <lars@...afoo.de>,
        <Michael.Hennerich@...log.com>, <marcelo.schmitt@...log.com>,
        <jic23@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>, <marcelo.schmitt1@...il.com>,
        <linus.walleij@...aro.org>, <brgl@...ev.pl>, <lgirdwood@...il.com>,
        <broonie@...nel.org>, <jonath4nns@...il.com>, <dlechner@...libre.com>
Subject: [PATCH v5 01/14] dt-bindings: trigger-source: add generic GPIO trigger source

Inspired by pwn-trigger, create a new binding for using a GPIO
pin as a trigger source.

Signed-off-by: Jonathan Santos <Jonathan.Santos@...log.com>
---
v5 Changes:
* New patch in v5.
---
 .../bindings/trigger-source/gpio-trigger.yaml | 40 +++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/trigger-source/gpio-trigger.yaml

diff --git a/Documentation/devicetree/bindings/trigger-source/gpio-trigger.yaml b/Documentation/devicetree/bindings/trigger-source/gpio-trigger.yaml
new file mode 100644
index 000000000000..d77d62050179
--- /dev/null
+++ b/Documentation/devicetree/bindings/trigger-source/gpio-trigger.yaml
@@ -0,0 +1,40 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/trigger-source/gpio-trigger.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Generic trigger source using GPIO
+
+description: Remaps a GPIO pin as a trigger source.
+
+maintainers:
+  - Jonathan Santos <Jonathan.Santos@...log.com>
+
+properties:
+  compatible:
+    const: gpio-trigger
+
+  '#trigger-source-cells':
+    const: 0
+
+  gpios:
+    maxItems: 1
+    description: GPIO to be used as a trigger source.
+
+required:
+  - compatible
+  - '#trigger-source-cells'
+  - gpios
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    trigger {
+        compatible = "gpio-trigger";
+        #trigger-source-cells = <0>;
+        gpios = <&gpio1 15 GPIO_ACTIVE_HIGH>;
+    };
-- 
2.34.1