66 lines · yaml
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)2%YAML 1.23---4$id: http://devicetree.org/schemas/power/reset/gpio-poweroff.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: GPIO controlled power off8 9maintainers:10 - Sebastian Reichel <sre@kernel.org>11 12description: >13 System power off support via a GPIO line. When a shutdown is14 executed the operating system is expected to switch the GPIO15 from inactive to active. After a delay (active-delay-ms) it16 is expected to be switched back to inactive. After another17 delay (inactive-delay-ms) it is configured as active again.18 Finally the operating system assumes the power off failed if19 the system is still running after waiting some time (timeout-ms).20 21allOf:22 - $ref: restart-handler.yaml#23 24properties:25 compatible:26 const: gpio-poweroff27 28 gpios:29 maxItems: 130 31 input:32 type: boolean33 description: >34 Initially configure the GPIO line as an input. Only reconfigure35 it to an output when the power-off sequence is initiated. If this optional36 property is not specified, the GPIO is initialized as an output in its inactive state.37 38 active-delay-ms:39 default: 10040 description: Delay to wait after driving gpio active41 42 inactive-delay-ms:43 default: 10044 description: Delay to wait after driving gpio inactive45 46 priority:47 default: 048 49 timeout-ms:50 default: 300051 description: Time to wait before assuming the power off sequence failed.52 53required:54 - compatible55 - gpios56 57additionalProperties: false58 59examples:60 - |61 gpio-poweroff {62 compatible = "gpio-poweroff";63 gpios = <&gpio 4 0>;64 timeout-ms = <3000>;65 };66