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b385830290
Add device tree bindings for the RPMI clock service group based controller for the supervisor software. The RPMI clock service group is defined by the RISC-V platform management interface (RPMI) specification. Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Reviewed-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Anup Patel <apatel@ventanamicro.com> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> Link: https://lore.kernel.org/r/20250818040920.272664-10-apatel@ventanamicro.com Signed-off-by: Paul Walmsley <pjw@kernel.org>
65 lines
1.8 KiB
YAML
65 lines
1.8 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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$id: http://devicetree.org/schemas/clock/riscv,rpmi-clock.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: RISC-V RPMI clock service group based clock controller
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maintainers:
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- Anup Patel <anup@brainfault.org>
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description: |
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The RISC-V Platform Management Interface (RPMI) [1] defines a
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messaging protocol which is modular and extensible. The supervisor
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software can send/receive RPMI messages via SBI MPXY extension [2]
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or some dedicated supervisor-mode RPMI transport.
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The RPMI specification [1] defines clock service group for accessing
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system clocks managed by a platform microcontroller. The supervisor
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software can access RPMI clock service group via SBI MPXY channel or
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some dedicated supervisor-mode RPMI transport.
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===========================================
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References
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===========================================
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[1] RISC-V Platform Management Interface (RPMI) v1.0 (or higher)
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https://github.com/riscv-non-isa/riscv-rpmi/releases
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[2] RISC-V Supervisor Binary Interface (SBI) v3.0 (or higher)
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https://github.com/riscv-non-isa/riscv-sbi-doc/releases
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properties:
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compatible:
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description:
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Intended for use by the supervisor software.
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const: riscv,rpmi-clock
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mboxes:
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maxItems: 1
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description:
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Mailbox channel of the underlying RPMI transport or SBI message proxy channel.
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"#clock-cells":
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const: 1
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description:
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Platform specific CLOCK_ID as defined by the RISC-V Platform Management
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Interface (RPMI) specification.
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required:
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- compatible
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- mboxes
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- "#clock-cells"
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additionalProperties: false
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examples:
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- |
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clock-controller {
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compatible = "riscv,rpmi-clock";
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mboxes = <&mpxy_mbox 0x1000 0x0>;
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#clock-cells = <1>;
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};
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...
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