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