66 lines
2.4 KiB
Plaintext
66 lines
2.4 KiB
Plaintext
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MediaTek SCPSYS
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===============
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The System Control Processor System (SCPSYS) has several power management
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related tasks in the system. The tasks include thermal measurement, dynamic
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voltage frequency scaling (DVFS), interrupt filter and lowlevel sleep control.
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The System Power Manager (SPM) inside the SCPSYS is for the MTCMOS power
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domain control.
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The driver implements the Generic PM domain bindings described in
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power/power_domain.txt. It provides the power domains defined in
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- include/dt-bindings/power/mt8173-power.h
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- include/dt-bindings/power/mt6797-power.h
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- include/dt-bindings/power/mt2701-power.h
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- include/dt-bindings/power/mt7622-power.h
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Required properties:
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- compatible: Should be one of:
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- "mediatek,mt2701-scpsys"
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- "mediatek,mt6797-scpsys"
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- "mediatek,mt7622-scpsys"
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- "mediatek,mt8173-scpsys"
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- #power-domain-cells: Must be 1
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- reg: Address range of the SCPSYS unit
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- infracfg: must contain a phandle to the infracfg controller
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- clock, clock-names: clocks according to the common clock binding.
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These are clocks which hardware needs to be
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enabled before enabling certain power domains.
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Required clocks for MT2701: "mm", "mfg", "ethif"
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Required clocks for MT6797: "mm", "mfg", "vdec"
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Required clocks for MT7622: "hif_sel"
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Required clocks for MT8173: "mm", "mfg", "venc", "venc_lt"
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Optional properties:
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- vdec-supply: Power supply for the vdec power domain
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- venc-supply: Power supply for the venc power domain
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- isp-supply: Power supply for the isp power domain
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- mm-supply: Power supply for the mm power domain
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- venc_lt-supply: Power supply for the venc_lt power domain
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- audio-supply: Power supply for the audio power domain
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- usb-supply: Power supply for the usb power domain
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- mfg_async-supply: Power supply for the mfg_async power domain
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- mfg_2d-supply: Power supply for the mfg_2d power domain
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- mfg-supply: Power supply for the mfg power domain
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Example:
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scpsys: scpsys@10006000 {
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#power-domain-cells = <1>;
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compatible = "mediatek,mt8173-scpsys";
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reg = <0 0x10006000 0 0x1000>;
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infracfg = <&infracfg>;
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clocks = <&clk26m>,
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<&topckgen CLK_TOP_MM_SEL>;
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<&topckgen CLK_TOP_VENC_SEL>,
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<&topckgen CLK_TOP_VENC_LT_SEL>;
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clock-names = "mfg", "mm", "venc", "venc_lt";
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};
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Example consumer:
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afe: mt8173-afe-pcm@11220000 {
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compatible = "mediatek,mt8173-afe-pcm";
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power-domains = <&scpsys MT8173_POWER_DOMAIN_AUDIO>;
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};
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