Documentation/devicetree/bindings/watchdog/mediatek,mtk-wdt.yaml

   1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/watchdog/mediatek,mtk-wdt.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: MediaTek SoCs Watchdog timer
   8
   9 maintainers:
  10   - Matthias Brugger <matthias.bgg@gmail.com>
  11
  12 description:
  13   The watchdog supports a pre-timeout interrupt that fires
  14   timeout-sec/2 before the expiry.
  15
  16 allOf:
  17   - $ref: watchdog.yaml#
  18
  19 properties:
  20   compatible:
  21     oneOf:
  22       - enum:
  23           - mediatek,mt2712-wdt
  24           - mediatek,mt6589-wdt
  25           - mediatek,mt6735-wdt
  26           - mediatek,mt6795-wdt
  27           - mediatek,mt7986-wdt
  28           - mediatek,mt8183-wdt
  29           - mediatek,mt8186-wdt
  30           - mediatek,mt8188-wdt
  31           - mediatek,mt8192-wdt
  32           - mediatek,mt8195-wdt
  33       - items:
  34           - enum:
  35               - mediatek,mt2701-wdt
  36               - mediatek,mt6582-wdt
  37               - mediatek,mt6797-wdt
  38               - mediatek,mt7622-wdt
  39               - mediatek,mt7623-wdt
  40               - mediatek,mt7629-wdt
  41               - mediatek,mt8173-wdt
  42               - mediatek,mt8365-wdt
  43               - mediatek,mt8516-wdt
  44           - const: mediatek,mt6589-wdt
  45
  46   reg:
  47     maxItems: 1
  48
  49   interrupts:
  50     items:
  51       - description: Watchdog pre-timeout (bark) interrupt
  52
  53   mediatek,disable-extrst:
  54     description: Disable sending output reset signal
  55     type: boolean
  56
  57   mediatek,reset-by-toprgu:
  58     description: The Top Reset Generation Unit (TOPRGU) generates reset signals
  59       and distributes them to each IP. If present, the watchdog timer will be
  60       reset by TOPRGU once system resets.
  61     type: boolean
  62
  63   '#reset-cells':
  64     const: 1
  65
  66 required:
  67   - compatible
  68   - reg
  69
  70 unevaluatedProperties: false
  71
  72 examples:
  73   - |
  74     #include <dt-bindings/interrupt-controller/arm-gic.h>
  75
  76     soc {
  77         #address-cells = <2>;
  78         #size-cells = <2>;
  79
  80         watchdog: watchdog@10007000 {
  81             compatible = "mediatek,mt8183-wdt";
  82             reg = <0 0x10007000 0 0x100>;
  83             interrupts = <GIC_SPI 139 IRQ_TYPE_LEVEL_LOW>;
  84             mediatek,disable-extrst;
  85             timeout-sec = <10>;
  86             #reset-cells = <1>;
  87         };
  88     };