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dt-bindings: timer: Add EcoNet EN751221 "HPT" CPU Timer
Add device tree bindings for the so-called high-precision timer (HPT)
in the EcoNet EN751221 SoC.
Signed-off-by: Caleb James DeLisle <cjd@cjdns.fr>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250507134500.390547-2-cjd@cjdns.fr
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
authored by
Caleb James DeLisle
and committed by
Daniel Lezcano
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7aeeac55
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Documentation/devicetree/bindings/timer/econet,en751221-timer.yaml
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Documentation/devicetree/bindings/timer/econet,en751221-timer.yaml
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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/timer/econet,en751221-timer.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: EcoNet EN751221 High Precision Timer (HPT)
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maintainers:
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- Caleb James DeLisle <cjd@cjdns.fr>
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description:
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The EcoNet High Precision Timer (HPT) is a timer peripheral found in various
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EcoNet SoCs, including the EN751221 and EN751627 families. It provides per-VPE
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count/compare registers and a per-CPU control register, with a single interrupt
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line using a percpu-devid interrupt mechanism.
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properties:
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compatible:
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oneOf:
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- const: econet,en751221-timer
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- items:
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- const: econet,en751627-timer
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- const: econet,en751221-timer
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reg:
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minItems: 1
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maxItems: 2
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interrupts:
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maxItems: 1
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description: A percpu-devid timer interrupt shared across CPUs.
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clocks:
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maxItems: 1
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required:
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- compatible
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- reg
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- interrupts
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- clocks
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allOf:
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- if:
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properties:
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compatible:
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contains:
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const: econet,en751627-timer
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then:
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properties:
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reg:
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items:
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- description: VPE timers 0 and 1
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- description: VPE timers 2 and 3
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else:
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properties:
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reg:
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items:
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- description: VPE timers 0 and 1
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additionalProperties: false
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examples:
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- |
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timer@1fbf0400 {
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compatible = "econet,en751627-timer", "econet,en751221-timer";
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reg = <0x1fbf0400 0x100>, <0x1fbe0000 0x100>;
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interrupt-parent = <&intc>;
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interrupts = <30>;
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clocks = <&hpt_clock>;
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};
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- |
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timer@1fbf0400 {
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compatible = "econet,en751221-timer";
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reg = <0x1fbe0400 0x100>;
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interrupt-parent = <&intc>;
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interrupts = <30>;
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clocks = <&hpt_clock>;
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};
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...