From 71708daa6f1446248de107e04cf28ffd322c800f Mon Sep 17 00:00:00 2001 From: Robert Marko Date: Fri, 25 Nov 2022 12:29:04 +0100 Subject: [PATCH] dt-bindings: watchdog: Convert GPIO binding to json-schema Convert the DT binding for GPIO WDT to JSON schema. Cc: luka.perkov@sartura.hr Signed-off-by: Robert Marko Reviewed-by: Rob Herring Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20221125112904.48652-1-robert.marko@sartura.hr Signed-off-by: Guenter Roeck Signed-off-by: Wim Van Sebroeck --- .../devicetree/bindings/watchdog/gpio-wdt.yaml | 55 ++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 Documentation/devicetree/bindings/watchdog/gpio-wdt.yaml diff --git a/Documentation/devicetree/bindings/watchdog/gpio-wdt.yaml b/Documentation/devicetree/bindings/watchdog/gpio-wdt.yaml new file mode 100644 index 0000000..155dc79 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/gpio-wdt.yaml @@ -0,0 +1,55 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/watchdog/gpio-wdt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: GPIO controlled watchdog + +maintainers: + - Robert Marko + +properties: + compatible: + const: linux,wdt-gpio + + gpios: + maxItems: 1 + description: GPIO connected to the WDT reset pin + + hw_algo: + $ref: /schemas/types.yaml#/definitions/string + description: Algorithm used by the driver + oneOf: + - description: + Either a high-to-low or a low-to-high transition clears the WDT counter. + The watchdog timer is disabled when GPIO is left floating or connected + to a three-state buffer. + const: toggle + - description: + Low or high level starts counting WDT timeout, the opposite level + disables the WDT. + Active level is determined by the GPIO flags. + const: level + + hw_margin_ms: + $ref: /schemas/types.yaml#/definitions/uint32 + description: Maximum time to reset watchdog circuit (in milliseconds) + minimum: 2 + maximum: 65535 + + always-running: + type: boolean + description: + If the watchdog timer cannot be disabled, add this flag to have the driver + keep toggling the signal without a client. + It will only cease to toggle the signal when the device is open and the + timeout elapsed. + +required: + - compatible + - gpios + - hw_algo + - hw_margin_ms + +unevaluatedProperties: false -- 2.7.4