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97b9ee2972
Add bindings for the Samsung Exynos ACPM mailbox protocol. Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20250213-gs101-acpm-v9-1-8b0281b93c8b@linaro.org Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
51 lines
1.3 KiB
YAML
51 lines
1.3 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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# Copyright 2024 Linaro Ltd.
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/firmware/google,gs101-acpm-ipc.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Samsung Exynos ACPM mailbox protocol
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maintainers:
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- Tudor Ambarus <tudor.ambarus@linaro.org>
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description: |
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ACPM (Alive Clock and Power Manager) is a firmware that operates on the
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APM (Active Power Management) module that handles overall power management
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activities. ACPM and masters regard each other as independent hardware
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component and communicate with each other using mailbox messages and
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shared memory.
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This binding is intended to define the interface the firmware implementing
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ACPM provides for OSPM in the device tree.
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properties:
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compatible:
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const: google,gs101-acpm-ipc
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mboxes:
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maxItems: 1
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shmem:
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description:
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List of phandle pointing to the shared memory (SHM) area. The memory
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contains channels configuration data and the TX/RX ring buffers that
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are used for passing messages to/from the ACPM firmware.
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maxItems: 1
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required:
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- compatible
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- mboxes
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- shmem
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additionalProperties: false
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examples:
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- |
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power-management {
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compatible = "google,gs101-acpm-ipc";
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mboxes = <&ap2apm_mailbox>;
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shmem = <&apm_sram>;
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};
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