45 lines
1.1 KiB
YAML
45 lines
1.1 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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$id: http://devicetree.org/schemas/rtc/amlogic,meson-vrtc.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Amlogic Virtual RTC (VRTC)
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maintainers:
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- Neil Armstrong <neil.armstrong@linaro.org>
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description: |
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This is a Linux interface to an RTC managed by firmware, hence it's
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virtual from a Linux perspective. The interface is 1 register where
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an alarm time (in seconds) is to be written.
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The alarm register is a simple scratch register shared between the
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application processors (AP) and the secure co-processor (SCP.) When
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the AP suspends, the SCP will use the value of this register to
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program an always-on timer before going sleep. When the timer expires,
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the SCP will wake up and will then wake the AP.
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allOf:
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- $ref: rtc.yaml#
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properties:
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compatible:
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enum:
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- amlogic,meson-vrtc
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reg:
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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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additionalProperties: false
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examples:
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- |
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rtc@a8 {
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compatible = "amlogic,meson-vrtc";
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reg = <0x000a8 0x4>;
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};
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