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831ee17036
The DVFSRC hardware has a clock on all platforms. Instead or proliferating the culture of omitting clock descriptions in the clock controller drivers or marking them critical instead of declaring these types of relationships, add this one to the binding. Any device that wishes to use this binding should figure out their incomplete or incorrect clock situation first before piling more features on top. Acked-by: Rob Herring (Arm) <robh@kernel.org> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
90 lines
2.7 KiB
YAML
90 lines
2.7 KiB
YAML
# 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,mt6893-dvfsrc
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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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clocks:
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items:
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- description: Clock that drives the DVFSRC MCU
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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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#include <dt-bindings/clock/mt8195-clk.h>
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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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clocks = <&topckgen CLK_TOP_DVFSRC>;
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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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};
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