The System Control Processor System (SCPSYS) has several power management related tasks in the system. Add the bindings to define the power domains for the SCPSYS power controller. Co-developed-by: Matthias Brugger <mbrugger@xxxxxxxx> Signed-off-by: Matthias Brugger <mbrugger@xxxxxxxx> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx> --- Dear Rob, I am awasre that this binding is not ready, but I prefered to send because I'm kind of blocked. Compiling this binding triggers the following error: mediatek,power-controller.example.dt.yaml: syscon@10006000: mfg_async@7: '#address-cells', '#size-cells', 'mfg_2d@8' do not match any of the regexes: 'pinctrl-[0-9]+' This happens when a definition of a power-domain (parent) contains another power-domain (child), like the example. I am not sure how to specify this in the yaml and deal with this, so any clue is welcome. Thanks, Enric .../power/mediatek,power-controller.yaml | 171 ++++++++++++++++++ 1 file changed, 171 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/mediatek,power-controller.yaml diff --git a/Documentation/devicetree/bindings/power/mediatek,power-controller.yaml b/Documentation/devicetree/bindings/power/mediatek,power-controller.yaml new file mode 100644 index 000000000000..8be9244ad160 --- /dev/null +++ b/Documentation/devicetree/bindings/power/mediatek,power-controller.yaml @@ -0,0 +1,171 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/power/mediatek,power-controller.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Mediatek Power Domains Controller + +maintainers: + - Weiyi Lu <weiyi.lu@xxxxxxxxxxxx> + - Matthias Brugger <mbrugger@xxxxxxxx> + +description: | + Mediatek processors include support for multiple power domains which can be + powered up/down by software based on different application scenes to save power. + + IP cores belonging to a power domain should contain a 'power-domains' + property that is a phandle for SCPSYS node representing the domain. + +properties: + $nodename: + pattern: "^syscon@[0-9a-f]+$" + + compatible: + items: + - enum: + - mediatek,mt8173-power-controller + - const: syscon + + reg: + maxItems: 1 + +patternProperties: + "^.*@[0-9]$": + type: object + description: | + Represents the power domains within the power controller node as documented + in Documentation/devicetree/bindings/power/power-domain.yaml. + + properties: + reg: + description: | + Power domain index. Valid values are defined in: + "include/dt-bindings/power/mt8173-power.h" - for MT8173 type power domain. + maxItems: 1 + + '#power-domain-cells': + description: + Documented by the generic PM Domain bindings in + Documentation/devicetree/bindings/power/power-domain.yaml. + + clocks: + description: | + A number of phandles to clocks that need to be enabled during domain + power-up sequencing. + + clock-names: + description: | + List of names of clocks, in order to match the power-up sequencing + for each power domain we need to group the clocks by name. BASIC + clocks need to be enabled before enabling the corresponding power + domain, and should not have a '-' in their name (i.e mm, mfg, venc). + SUSBYS clocks need to be enabled before releasing the bus protection, + and should contain a '-' in their name (i.e mm-0, isp-0, cam-0). + + In order to follow properly the power-up sequencing, the clocks must + be specified by order, adding first the BASIC clocks followed by the + SUSBSYS clocks. + + mediatek,infracfg: + $ref: /schemas/types.yaml#definitions/phandle + description: phandle to the device containing the INFRACFG register range. + + mediatek,smi: + $ref: /schemas/types.yaml#definitions/phandle + description: phandle to the device containing the SMI register range. + + required: + - reg + - '#power-domain-cells' + + additionalProperties: false + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + #include <dt-bindings/clock/mt8173-clk.h> + #include <dt-bindings/power/mt8173-power.h> + + soc { + #address-cells = <2>; + #size-cells = <2>; + + scpsys: syscon@10006000 { + compatible = "mediatek,mt8173-power-controller", "syscon"; + reg = <0 0x10006000 0 0x1000>; + + #address-cells = <1>; + #size-cells = <0>; + + /* power domains of the SoC */ + vdec@MT8173_POWER_DOMAIN_VDEC { + reg = <MT8173_POWER_DOMAIN_VDEC>; + clocks = <&topckgen CLK_TOP_MM_SEL>; + clock-names = "mm"; + #power-domain-cells = <0>; + }; + + venc@MT8173_POWER_DOMAIN_VENC { + reg = <MT8173_POWER_DOMAIN_VENC>; + clocks = <&topckgen CLK_TOP_MM_SEL>, + <&topckgen CLK_TOP_VENC_SEL>; + clock-names = "mm", "venc"; + #power-domain-cells = <0>; + }; + isp@MT8173_POWER_DOMAIN_ISP { + reg = <MT8173_POWER_DOMAIN_ISP>; + clocks = <&topckgen CLK_TOP_MM_SEL>; + clock-names = "mm"; + #power-domain-cells = <0>; + }; + mm@MT8173_POWER_DOMAIN_MM { + reg = <MT8173_POWER_DOMAIN_MM>; + clocks = <&topckgen CLK_TOP_MM_SEL>; + clock-names = "mm"; + #power-domain-cells = <0>; + mediatek,infracfg = <&infracfg>; + }; + venc_lt@MT8173_POWER_DOMAIN_VENC_LT { + reg = <MT8173_POWER_DOMAIN_VENC_LT>; + clocks = <&topckgen CLK_TOP_MM_SEL>, + <&topckgen CLK_TOP_VENC_LT_SEL>; + clock-names = "mm", "venclt"; + #power-domain-cells = <0>; + }; + audio@MT8173_POWER_DOMAIN_AUDIO { + reg = <MT8173_POWER_DOMAIN_AUDIO>; + #power-domain-cells = <0>; + }; + usb@MT8173_POWER_DOMAIN_USB { + reg = <MT8173_POWER_DOMAIN_USB>; + #power-domain-cells = <0>; + }; + mfg_async@MT8173_POWER_DOMAIN_MFG_ASYNC { + reg = <MT8173_POWER_DOMAIN_MFG_ASYNC>; + clocks = <&clk26m>; + clock-names = "mfg"; + #address-cells = <1>; + #size-cells = <0>; + #power-domain-cells = <1>; + + mfg_2d@MT8173_POWER_DOMAIN_MFG_2D { + reg = <MT8173_POWER_DOMAIN_MFG_2D>; + #address-cells = <1>; + #size-cells = <0>; + #power-domain-cells = <1>; + + mfg@MT8173_POWER_DOMAIN_MFG { + reg = <MT8173_POWER_DOMAIN_MFG>; + #power-domain-cells = <0>; + mediatek,infracfg = <&infracfg>; + }; + }; + }; + }; + }; -- 2.28.0