dt-bindings: trigger-source: add generic PWM trigger source

Add a new binding for using a PWM signal as a trigger source.

The idea here is similar to e.g. "pwm-clock" to allow a trigger source
cons

dt-bindings: trigger-source: add generic PWM trigger source

Add a new binding for using a PWM signal as a trigger source.

The idea here is similar to e.g. "pwm-clock" to allow a trigger source
consumer to use a PWM provider as a trigger source.

Reviewed-by: Jonathan Cameron <[email protected]>
Reviewed-by: Rob Herring (Arm) <[email protected]>
Signed-off-by: David Lechner <[email protected]>
Link: https://patch.msgid.link/20250207-dlech-mainline-spi-engine-offload-2-v8-3-e48a489be48c@baylibre.com
Signed-off-by: Mark Brown <[email protected]>

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