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|
# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/watchdog/realtek,otto-wdt.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Realtek Otto watchdog timer
maintainers:
- Sander Vanheule <sander@svanheule.net>
description: |
The timer has two timeout phases. Both phases have a maximum duration of 32
prescaled clock ticks, which is ca. 43s with a bus clock of 200MHz. The
minimum duration of each phase is one tick. Each phase can trigger an
interrupt, although the phase 2 interrupt will occur with the system reset.
- Phase 1: During this phase, the WDT can be pinged to reset the timeout.
- Phase 2: Starts after phase 1 has timed out, and only serves to give the
system some time to clean up, or notify others that it's going to reset.
During this phase, pinging the WDT has no effect, and a reset is
unavoidable, unless the WDT is disabled.
allOf:
- $ref: watchdog.yaml#
properties:
compatible:
enum:
- realtek,rtl8380-wdt
- realtek,rtl8390-wdt
- realtek,rtl9300-wdt
reg:
maxItems: 1
clocks:
maxItems: 1
interrupts:
items:
- description: interrupt specifier for pretimeout
- description: interrupt specifier for timeout
interrupt-names:
items:
- const: phase1
- const: phase2
realtek,reset-mode:
$ref: /schemas/types.yaml#/definitions/string
description: |
Specify how the system is reset after a timeout. Defaults to "cpu" if
left unspecified.
oneOf:
- description: Reset the entire chip
const: soc
- description: |
Reset the CPU and IPsec engine, but leave other peripherals untouched
const: cpu
- description: |
Reset the execution pointer, but don't actually reset any hardware
const: software
required:
- compatible
- reg
- clocks
- interrupts
unevaluatedProperties: false
dependencies:
interrupts: [ interrupt-names ]
examples:
- |
watchdog: watchdog@3150 {
compatible = "realtek,rtl8380-wdt";
reg = <0x3150 0xc>;
realtek,reset-mode = "soc";
clocks = <&lxbus_clock>;
timeout-sec = <20>;
interrupt-parent = <&rtlintc>;
interrupt-names = "phase1", "phase2";
interrupts = <19>, <18>;
};
...
|
