Documentation/devicetree/bindings/timer/arm,twd-timer.yaml

   1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/timer/arm,twd-timer.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: ARM Timer-Watchdog Timer
   8
   9 maintainers:
  10   - Rob Herring <robh@kernel.org>
  11
  12 description:
  13   ARM 11MP, Cortex-A5 and Cortex-A9 are often associated with a per-core
  14   Timer-Watchdog (aka TWD), which provides both a per-cpu local timer
  15   and watchdog.
  16
  17   The TWD is usually attached to a GIC to deliver its two per-processor
  18   interrupts.
  19
  20 properties:
  21   compatible:
  22     enum:
  23       - arm,cortex-a9-twd-timer
  24       - arm,cortex-a5-twd-timer
  25       - arm,arm11mp-twd-timer
  26
  27   reg:
  28     maxItems: 1
  29
  30   interrupts:
  31     maxItems: 1
  32
  33   clocks:
  34     maxItems: 1
  35
  36   always-on:
  37     description:
  38       If present, the timer is powered through an always-on power domain,
  39       therefore it never loses context.
  40
  41 required:
  42   - compatible
  43   - reg
  44   - interrupts
  45
  46 additionalProperties: false
  47
  48 examples:
  49   - |
  50     #include <dt-bindings/interrupt-controller/arm-gic.h>
  51
  52     timer@2c000600 {
  53             compatible = "arm,arm11mp-twd-timer";
  54             reg = <0x2c000600 0x20>;
  55             interrupts = <GIC_PPI 13 0xf01>;
  56     };