Documentation/devicetree/bindings/timer/arm,armv7m-systick.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,armv7m-systick.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: ARMv7M System Timer
   8
   9 maintainers:
  10   - Alexandre Torgue <alexandre.torgue@foss.st.com>
  11   - Fabrice Gasnier <fabrice.gasnier@foss.st.com>
  12
  13 description: ARMv7-M includes a system timer, known as SysTick.
  14
  15 properties:
  16   compatible:
  17     const: arm,armv7m-systick
  18
  19   reg:
  20     maxItems: 1
  21
  22   clocks:
  23     maxItems: 1
  24
  25   clock-frequency: true
  26
  27 oneOf:
  28   - required:
  29       - clocks
  30   - required:
  31       - clock-frequency
  32
  33 required:
  34   - compatible
  35   - reg
  36
  37 additionalProperties: false
  38
  39 examples:
  40   - |
  41     timer@e000e010 {
  42         compatible = "arm,armv7m-systick";
  43         reg = <0xe000e010 0x10>;
  44         clocks = <&clk_systick>;
  45     };
  46
  47   - |
  48     timer@e000e010 {
  49         compatible = "arm,armv7m-systick";
  50         reg = <0xe000e010 0x10>;
  51         clock-frequency = <90000000>;
  52     };
  53
  54 ...