[v5,04/16] spi: dt-bindings: add PWM SPI offload trigger

Commit Message

David Lechner Nov. 15, 2024, 8:18 p.m. UTC

Add a new binding for using a PWM signal as a trigger for SPI offloads.

Signed-off-by: David Lechner <[e-mail]>
---

v5 changes:
* Add MAINTAINERS entry

v4 changes: new patch in v4
---
 .../devicetree/bindings/spi/trigger-pwm.yaml       | 39 ++++++++++++++++++++++
 MAINTAINERS                                        |  1 +
 2 files changed, 40 insertions(+)

Patch

diff --git a/Documentation/devicetree/bindings/spi/trigger-pwm.yaml b/Documentation/devicetree/bindings/spi/trigger-pwm.yaml
new file mode 100644
index 000000000000..987638aa4732
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/trigger-pwm.yaml
@@ -0,0 +1,39 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/trigger-pwm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Generic SPI offload trigger using PWM
+
+description: Remaps a PWM channel as a trigger source.
+
+maintainers:
+  - David Lechner <[e-mail]>
+
+$ref: /schemas/spi/trigger-source.yaml#
+
+properties:
+  compatible:
+    const: trigger-pwm
+
+  '#trigger-source-cells':
+    const: 0
+
+  pwms:
+    maxItems: 1
+
+required:
+  - compatible
+  - '#trigger-source-cells'
+  - pwms
+
+additionalProperties: false
+
+examples:
+  - |
+    trigger {
+        compatible = "trigger-pwm";
+        #trigger-source-cells = <0>;
+        pwms = <&pwm 0 1000000 0>;
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index 91a4a7eb6194..a43532a1edde 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -22021,6 +22021,7 @@  F:	include/linux/mtd/spi-nor.h
 
 SPI OFFLOAD
 R:	David Lechner <[e-mail]>
+F:	Documentation/devicetree/bindings/spi/trigger-pwm.yaml
 F:	Documentation/devicetree/bindings/spi/trigger-source.yaml
 F:	drivers/spi/spi-offload.c
 F:	include/linux/spi/spi-offload.h