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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20241115-dlech-mainline-spi-engine-offload-2-v5-4-bea815bd5ea5@baylibre.com>
Date: Fri, 15 Nov 2024 14:18:43 -0600
From: David Lechner <dlechner@...libre.com>
To: Mark Brown <broonie@...nel.org>, Jonathan Cameron <jic23@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Nuno Sá <nuno.sa@...log.com>
Cc: Uwe Kleine-König <ukleinek@...nel.org>, 
 Michael Hennerich <Michael.Hennerich@...log.com>, 
 Lars-Peter Clausen <lars@...afoo.de>, David Jander <david@...tonic.nl>, 
 Martin Sperl <kernel@...tin.sperl.org>, linux-spi@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-iio@...r.kernel.org, linux-pwm@...r.kernel.org, 
 David Lechner <dlechner@...libre.com>
Subject: [PATCH v5 04/16] spi: dt-bindings: add PWM SPI offload trigger

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

Signed-off-by: David Lechner <dlechner@...libre.com>
---

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(+)

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 <dlechner@...libre.com>
+
+$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 <dlechner@...libre.com>
+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

-- 
2.43.0