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dt-bindings: soc: mediatek: Add DVFSRC bindings for MT8183 and MT8195
Add bindings for the MediaTek Dynamic Voltage and Frequency Scaling
Resource Collector (DVFSRC), a hardware module used to collect all the
requests from both software and the various remote processors embedded
into the SoC and decide about a minimum operating voltage and a minimum
DRAM frequency to fulfill those requests in an effort to provide the
best achievable performance per watt.
This hardware IP is capable of transparently performing direct register
R/W on all of the DVFSRC-controlled regulators and SoC bandwidth knobs.
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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Documentation/devicetree/bindings/soc/mediatek/mediatek,mt8183-dvfsrc.yaml
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Documentation/devicetree/bindings/soc/mediatek/mediatek,mt8183-dvfsrc.yaml
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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/soc/mediatek/mediatek,mt8183-dvfsrc.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: MediaTek Dynamic Voltage and Frequency Scaling Resource Collector (DVFSRC)
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description:
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The Dynamic Voltage and Frequency Scaling Resource Collector (DVFSRC) is a
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Hardware module used to collect all the requests from both software and the
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various remote processors embedded into the SoC and decide about a minimum
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operating voltage and a minimum DRAM frequency to fulfill those requests in
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an effort to provide the best achievable performance per watt.
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This hardware IP is capable of transparently performing direct register R/W
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on all of the DVFSRC-controlled regulators and SoC bandwidth knobs.
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maintainers:
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- AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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- Henry Chen <henryc.chen@mediatek.com>
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properties:
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compatible:
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oneOf:
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- enum:
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- mediatek,mt8183-dvfsrc
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- mediatek,mt8195-dvfsrc
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- items:
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- const: mediatek,mt8192-dvfsrc
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- const: mediatek,mt8195-dvfsrc
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reg:
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maxItems: 1
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description: DVFSRC common register address and length.
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regulators:
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type: object
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$ref: /schemas/regulator/mediatek,mt6873-dvfsrc-regulator.yaml#
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interconnect:
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type: object
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$ref: /schemas/interconnect/mediatek,mt8183-emi.yaml#
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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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soc {
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#address-cells = <2>;
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#size-cells = <2>;
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system-controller@10012000 {
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compatible = "mediatek,mt8195-dvfsrc";
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reg = <0 0x10012000 0 0x1000>;
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regulators {
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compatible = "mediatek,mt8195-dvfsrc-regulator";
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dvfsrc_vcore: dvfsrc-vcore {
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regulator-name = "dvfsrc-vcore";
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regulator-min-microvolt = <550000>;
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regulator-max-microvolt = <750000>;
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regulator-always-on;
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};
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dvfsrc_vscp: dvfsrc-vscp {
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regulator-name = "dvfsrc-vscp";
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regulator-min-microvolt = <550000>;
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regulator-max-microvolt = <750000>;
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regulator-always-on;
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};
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};
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emi_icc: interconnect {
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compatible = "mediatek,mt8195-emi";
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#interconnect-cells = <1>;
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};
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};
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};