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b06d6a1d0c
Rewrite the textual description for the VIA/WonderMedia timer as YAML schema. The IP can generate up to four interrupts from four respective match registers, so reflect that in the schema. Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Signed-off-by: Alexey Charkov <alchark@gmail.com> Link: https://lore.kernel.org/r/20250521-vt8500-timer-updates-v5-1-7e4bd11df72e@gmail.com Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
52 lines
1.4 KiB
YAML
52 lines
1.4 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/timer/via,vt8500-timer.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: VIA/Wondermedia VT8500 Timer
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description:
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This is the timer block that is a standalone part of the system power
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management controller on VIA/WonderMedia SoCs (VIA VT8500 and alike).
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The hardware has a single 32-bit counter running at 3 MHz and four match
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registers, each of which is associated with a dedicated match interrupt,
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and the first of which can also serve as the system watchdog (if the
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watchdog function is enabled, it will reset the system upon match instead
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of triggering its respective interrupt)
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maintainers:
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- Alexey Charkov <alchark@gmail.com>
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properties:
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compatible:
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const: via,vt8500-timer
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reg:
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maxItems: 1
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interrupts:
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minItems: 1
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items:
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- description: Channel 0 match. Note that if the watchdog function
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is enabled, this interrupt will not fire and the system will
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reboot instead once the counter reaches match register 0 value
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- description: Channel 1 match
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- description: Channel 2 match
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- description: Channel 3 match
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required:
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- compatible
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- reg
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- interrupts
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additionalProperties: false
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examples:
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- |
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timer@d8130100 {
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compatible = "via,vt8500-timer";
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reg = <0xd8130100 0x28>;
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interrupts = <36>;
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};
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