mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-09-07 14:19:35 +00:00
440b075bd2
Documentation/process/license-rules.rst and checkpatch expect the SPDX identifier syntax for multiple licenses to use capital "OR". Correct it to keep consistent format and avoid copy-paste issues. Correct also the format // -> .* in few Allwinner binding headers as pointed out by checkpatch: WARNING: Improper SPDX comment style for 'include/dt-bindings/reset/sun50i-h6-ccu.h', please use '/*' instead Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Acked-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Stephen Boyd <sboyd@kernel.org> Link: https://lore.kernel.org/r/20230823084540.112602-1-krzysztof.kozlowski@linaro.org Signed-off-by: Rob Herring <robh@kernel.org>
80 lines
2.7 KiB
YAML
80 lines
2.7 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
|
|
%YAML 1.2
|
|
---
|
|
$id: http://devicetree.org/schemas/power/reset/gpio-restart.yaml#
|
|
$schema: http://devicetree.org/meta-schemas/core.yaml#
|
|
|
|
title: GPIO controlled reset
|
|
|
|
maintainers:
|
|
- Sebastian Reichel <sre@kernel.org>
|
|
|
|
description: >
|
|
Drive a GPIO line that can be used to restart the system from a restart handler.
|
|
|
|
This binding supports level and edge triggered reset. At driver load time, the driver will
|
|
request the given gpio line and install a restart handler. If the optional properties
|
|
'open-source' is not found, the GPIO line will be driven in the inactive state. Otherwise its
|
|
not driven until the restart is initiated.
|
|
|
|
When the system is restarted, the restart handler will be invoked in priority order. The GPIO
|
|
is configured as an output, and driven active, triggering a level triggered reset condition.
|
|
This will also cause an inactive->active edge condition, triggering positive edge triggered
|
|
reset. After a delay specified by active-delay, the GPIO is set to inactive, thus causing an
|
|
active->inactive edge, triggering negative edge triggered reset. After a delay specified by
|
|
inactive-delay, the GPIO is driven active again. After a delay specified by wait-delay, the
|
|
restart handler completes allowing other restart handlers to be attempted.
|
|
|
|
allOf:
|
|
- $ref: restart-handler.yaml#
|
|
|
|
properties:
|
|
compatible:
|
|
const: gpio-restart
|
|
|
|
gpios:
|
|
description: The GPIO to set high/low, see "gpios property" in
|
|
Documentation/devicetree/bindings/gpio/gpio.txt. If the pin should be low to reset the board
|
|
set it to "Active Low", otherwise set GPIO to "Active High".
|
|
|
|
open-source:
|
|
$ref: /schemas/types.yaml#/definitions/flag
|
|
description: Treat the GPIO as being open source and defer driving it to when the restart is
|
|
initiated. If this optional property is not specified, the GPIO is initialized as an output
|
|
in its inactive state.
|
|
|
|
priority:
|
|
default: 129
|
|
|
|
active-delay:
|
|
$ref: /schemas/types.yaml#/definitions/uint32
|
|
description: Delay (default 100) to wait after driving gpio active [ms]
|
|
default: 100
|
|
|
|
inactive-delay:
|
|
$ref: /schemas/types.yaml#/definitions/uint32
|
|
description: Delay (default 100) to wait after driving gpio inactive [ms]
|
|
default: 100
|
|
|
|
wait-delay:
|
|
$ref: /schemas/types.yaml#/definitions/uint32
|
|
description: Delay (default 3000) to wait after completing restart sequence [ms]
|
|
default: 100
|
|
|
|
additionalProperties: false
|
|
|
|
required:
|
|
- compatible
|
|
- gpios
|
|
|
|
examples:
|
|
- |
|
|
gpio-restart {
|
|
compatible = "gpio-restart";
|
|
gpios = <&gpio 4 0>;
|
|
priority = <128>;
|
|
active-delay = <100>;
|
|
inactive-delay = <100>;
|
|
wait-delay = <3000>;
|
|
};
|