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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/timer/arm,armv7m-systick.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: ARMv7M System Timer
maintainers:
- Alexandre Torgue <alexandre.torgue@foss.st.com>
- Fabrice Gasnier <fabrice.gasnier@foss.st.com>
description: ARMv7-M includes a system timer, known as SysTick.
properties:
compatible:
const: arm,armv7m-systick
reg:
maxItems: 1
clocks:
maxItems: 1
clock-frequency: true
oneOf:
- required:
- clocks
- required:
- clock-frequency
required:
- compatible
- reg
additionalProperties: false
examples:
- |
timer@e000e010 {
compatible = "arm,armv7m-systick";
reg = <0xe000e010 0x10>;
clocks = <&clk_systick>;
};
- |
timer@e000e010 {
compatible = "arm,armv7m-systick";
reg = <0xe000e010 0x10>;
clock-frequency = <90000000>;
};
...
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