Documentation/devicetree/bindings/watchdog/samsung-wdt.yaml

   1 # SPDX-License-Identifier: GPL-2.0
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/watchdog/samsung-wdt.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Samsung SoC Watchdog Timer Controller
   8
   9 maintainers:
  10   - Krzysztof Kozlowski <krzk@kernel.org>
  11
  12 description: |+
  13   The Samsung's Watchdog controller is used for resuming system operation
  14   after a preset amount of time during which the WDT reset event has not
  15   occurred.
  16
  17 properties:
  18   compatible:
  19     enum:
  20       - samsung,s3c2410-wdt                   # for S3C2410
  21       - samsung,s3c6410-wdt                   # for S3C6410, S5PV210 and Exynos4
  22       - samsung,exynos5250-wdt                # for Exynos5250
  23       - samsung,exynos5420-wdt                # for Exynos5420
  24       - samsung,exynos7-wdt                   # for Exynos7
  25
  26   reg:
  27     maxItems: 1
  28
  29   clocks:
  30     maxItems: 1
  31
  32   clock-names:
  33     items:
  34       - const: watchdog
  35
  36   interrupts:
  37     maxItems: 1
  38
  39   samsung,syscon-phandle:
  40     $ref: /schemas/types.yaml#/definitions/phandle
  41     description:
  42       Phandle to the PMU system controller node (in case of Exynos5250
  43       and Exynos5420).
  44
  45 required:
  46   - compatible
  47   - clocks
  48   - clock-names
  49   - interrupts
  50   - reg
  51
  52 allOf:
  53   - $ref: watchdog.yaml#
  54   - if:
  55       properties:
  56         compatible:
  57           contains:
  58             enum:
  59               - samsung,exynos5250-wdt
  60               - samsung,exynos5420-wdt
  61     then:
  62       required:
  63         - samsung,syscon-phandle
  64
  65 unevaluatedProperties: false
  66
  67 examples:
  68   - |
  69     watchdog@101d0000 {
  70         compatible = "samsung,exynos5250-wdt";
  71         reg = <0x101D0000 0x100>;
  72         interrupts = <0 42 0>;
  73         clocks = <&clock 336>;
  74         clock-names = "watchdog";
  75         samsung,syscon-phandle = <&pmu_syscon>;
  76     };