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793e6b7480
Document the clock controller shipped in Loongson-2K0300 SoC, which generates various clock signals for SoC peripherals. Differing from previous generations of SoCs, LS2K0300 requires a 120MHz external clock input. Signed-off-by: Yao Zi <ziyao@disroot.org> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Reviewed-by: Yanteng Si <siyanteng@cqsoftware.com.cn> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
78 lines
1.7 KiB
YAML
78 lines
1.7 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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$id: http://devicetree.org/schemas/clock/loongson,ls2k-clk.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Loongson-2 SoC Clock Control Module
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maintainers:
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- Yinbo Zhu <zhuyinbo@loongson.cn>
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description: |
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Loongson-2 SoC clock control module is an integrated clock controller, which
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generates and supplies to all modules.
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properties:
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compatible:
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enum:
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- loongson,ls2k0300-clk
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- loongson,ls2k0500-clk
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- loongson,ls2k-clk # This is for Loongson-2K1000
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- loongson,ls2k2000-clk
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reg:
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maxItems: 1
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clocks:
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maxItems: 1
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clock-names:
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items:
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- const: ref_100m
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'#clock-cells':
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const: 1
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description:
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The clock consumer should specify the desired clock by having the clock
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ID in its "clocks" phandle cell. See include/dt-bindings/clock/loongson,ls2k-clk.h
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for the full list of Loongson-2 SoC clock IDs.
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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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const: loongson,ls2k0300-clk
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then:
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properties:
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clock-names: false
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else:
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required:
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- clock-names
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required:
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- compatible
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- reg
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- clocks
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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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ref_100m: clock-ref-100m {
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compatible = "fixed-clock";
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#clock-cells = <0>;
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clock-frequency = <100000000>;
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clock-output-names = "ref_100m";
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};
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clk: clock-controller@1fe00480 {
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compatible = "loongson,ls2k-clk";
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reg = <0x1fe00480 0x58>;
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#clock-cells = <1>;
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clocks = <&ref_100m>;
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clock-names = "ref_100m";
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};
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