linux-kernel - Re: [PATCH v7 02/12] dt-bindings: trigger-source: add generic GPIO trigger source

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Message-ID: <4b6a45d5-a6d8-4334-a405-df1cf4c2fcac@baylibre.com>
Date: Thu, 8 May 2025 12:56:58 -0500
From: David Lechner <dlechner@...libre.com>
To: Jonathan Santos <Jonathan.Santos@...log.com>, linux-iio@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-gpio@...r.kernel.org
Cc: andy@...nel.org, nuno.sa@...log.com, 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
Subject: Re: [PATCH v7 02/12] dt-bindings: trigger-source: add generic GPIO
 trigger source

On 5/8/25 12:03 PM, Jonathan Santos wrote:
> 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@...libre.com>
> Signed-off-by: Jonathan Santos <Jonathan.Santos@...log.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
> 
> 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@...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>;
> +    };
> 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@...libre.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

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