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[v7,02/12] dt-bindings: trigger-source: add generic GPIO trigger source

Message ID f62bcaabde172e0b2880f7d05dce97d684cc04ca.1746662899.git.Jonathan.Santos@analog.com
State New
Headers show
Series iio: adc: ad7768-1: Add features, improvements, and fixes | expand

Commit Message

Jonathan Santos May 8, 2025, 5:03 p.m. UTC 
Inspired by pwm-trigger, create a new binding for using a GPIO
line as a trigger source.

Link: https://lore.kernel.org/linux-iio/20250207-dlech-mainline-spi-engine-offload-2-v8-3-e48a489be48c@baylibre.com/
Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Jonathan Santos <Jonathan.Santos@analog.com>
---
v7 Changes:
* File added to MAINTAINERS and Made trigger source generic to include both pwm and gpio.

v6 Changes:
* Changed description.
* Fixed typos and replaced GPIO pin with GPIO line.
* Added link reference for pwm-trigger.

v5 Changes:
* New patch in v5.
---
 .../bindings/trigger-source/gpio-trigger.yaml | 40 +++++++++++++++++++
 MAINTAINERS                                   |  3 +-
 2 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/trigger-source/gpio-trigger.yaml
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Patch

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..1331d153ee82
--- /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: A GPIO used as a trigger source.
+
+maintainers:
+  - Jonathan Santos <Jonathan.Santos@analog.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>;
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index 01079a189c93..9b2e9a9dd8bc 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -24569,9 +24569,10 @@  W:	https://github.com/srcres258/linux-doc
 T:	git git://github.com/srcres258/linux-doc.git doc-zh-tw
 F:	Documentation/translations/zh_TW/
 
-TRIGGER SOURCE - PWM
+TRIGGER SOURCE
 M:	David Lechner <dlechner@baylibre.com>
 S:	Maintained
+F:	Documentation/devicetree/bindings/trigger-source/gpio-trigger.yaml
 F:	Documentation/devicetree/bindings/trigger-source/pwm-trigger.yaml
 
 TRUSTED SECURITY MODULE (TSM) ATTESTATION REPORTS