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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/gpio-delay.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: GPIO delay controller
+
+maintainers:
+ - Alexander Stein <linux@ew.tq-group.com>
+
+description: |
+ This binding describes an electrical setup where setting an GPIO output
+ is delayed by some external setup, e.g. RC circuit.
+
+ +----------+ +-----------+
+ | | VCC_B | |
+ | | | | |
+ | | VCC_A _ | |
+ | GPIO | | | R | Consumer |
+ |controller| ___ |_| | |
+ | | | | | | |
+ | [IOx|-------| |--+-----|-----+ |
+ | | |___| | | input |
+ | | | | |
+ +----------+ --- C +-----------+
+ ---
+ |
+ -
+ GND
+
+ If the input on the consumer is controlled by an open-drain signal
+ attached to an RC circuit the ramp-up delay is not under control
+ of the GPIO controller.
+
+properties:
+ compatible:
+ const: gpio-delay
+
+ "#gpio-cells":
+ description: |
+ Specifies the pin, ramp-up and ramp-down delays. The
+ delays are specified in microseconds.
+ const: 3
+
+ gpios:
+ description: Array of GPIOs which output signal change is delayed
+ minItems: 1
+ maxItems: 32
+
+ gpio-controller: true
+
+ gpio-line-names:
+ minItems: 1
+ maxItems: 32
+
+required:
+ - compatible
+ - "#gpio-cells"
+ - gpio-controller
+ - gpios
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ enable_delay: enable-delay {
+ compatible = "gpio-delay";
+ #gpio-cells = <3>;
+ gpio-controller;
+ gpios = <&gpio0 3 GPIO_ACTIVE_LOW>,
+ <&gpio3 1 GPIO_ACTIVE_HIGH>;
+ };
+
+ consumer {
+ enable-gpios = <&enable_delay 0 130000 30000>;
+ };