On Fri, Nov 15, 2024 at 02:18:43PM -0600, David Lechner wrote:
> Add a new binding for using a PWM signal as a trigger for SPI offloads.
>
> Signed-off-by: David Lechner <dlechner@baylibre.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
Not really anything specific to SPI offload here.
I think this should be moved to
bindings/trigger-source/trigger-pwm.yaml.
> +
> +description: Remaps a PWM channel as a trigger source.
> +
> +maintainers:
> + - David Lechner <dlechner@baylibre.com>
> +
> +$ref: /schemas/spi/trigger-source.yaml#
Including this doesn't really do anything. Will add more detail in its
patch.
> +
> +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@baylibre.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
>