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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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25a59e813c
There are additional SpacemiT syscon CCUs whose registers control both clocks and resets: RCPU, RCPU2, and APBC2. Unlike those defined previously, these will (initially) support only resets. They do not incorporate power domain functionality. Previously the clock properties were required for all compatible nodes. Make that requirement only apply to the three existing CCUs (APBC, APMU, and MPMU), so that the new reset-only CCUs can go without specifying them. Define the index values for resets associated with all SpacemiT K1 syscon nodes, including those with clocks already defined, as well as the new ones (without clocks). Signed-off-by: Alex Elder <elder@riscstar.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Reviewed-by: Yixun Lan <dlan@gentoo.org> Link: https://lore.kernel.org/r/20250702113709.291748-2-elder@riscstar.com Signed-off-by: Yixun Lan <dlan@gentoo.org>
96 lines
2.0 KiB
YAML
96 lines
2.0 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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$id: http://devicetree.org/schemas/soc/spacemit/spacemit,k1-syscon.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: SpacemiT K1 SoC System Controller
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maintainers:
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- Haylen Chu <heylenay@4d2.org>
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description:
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System controllers found on SpacemiT K1 SoC, which are capable of
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clock, reset and power-management functions.
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properties:
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compatible:
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enum:
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- spacemit,k1-syscon-apbc
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- spacemit,k1-syscon-apmu
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- spacemit,k1-syscon-mpmu
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- spacemit,k1-syscon-rcpu
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- spacemit,k1-syscon-rcpu2
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- spacemit,k1-syscon-apbc2
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reg:
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maxItems: 1
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clocks:
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maxItems: 4
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clock-names:
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items:
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- const: osc
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- const: vctcxo_1m
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- const: vctcxo_3m
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- const: vctcxo_24m
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"#clock-cells":
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const: 1
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description:
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See <dt-bindings/clock/spacemit,k1-syscon.h> for valid indices.
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"#power-domain-cells":
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const: 1
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"#reset-cells":
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const: 1
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required:
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- compatible
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- reg
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- "#reset-cells"
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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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enum:
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- spacemit,k1-syscon-apmu
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- spacemit,k1-syscon-mpmu
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then:
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required:
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- "#power-domain-cells"
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else:
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properties:
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"#power-domain-cells": false
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- if:
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properties:
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compatible:
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contains:
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enum:
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- spacemit,k1-syscon-apbc
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- spacemit,k1-syscon-apmu
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- spacemit,k1-syscon-mpmu
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then:
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required:
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- clocks
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- clock-names
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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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system-controller@d4050000 {
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compatible = "spacemit,k1-syscon-mpmu";
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reg = <0xd4050000 0x209c>;
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clocks = <&osc>, <&vctcxo_1m>, <&vctcxo_3m>, <&vctcxo_24m>;
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clock-names = "osc", "vctcxo_1m", "vctcxo_3m", "vctcxo_24m";
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#clock-cells = <1>;
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#power-domain-cells = <1>;
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#reset-cells = <1>;
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};
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