Document the binding for enabling mtk svs on MediaTek SoC. Signed-off-by: Roger Lu <roger.lu@xxxxxxxxxxxx> --- .../bindings/power/avs/mtk_svs.yaml | 141 ++++++++++++++++++ 1 file changed, 141 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/avs/mtk_svs.yaml diff --git a/Documentation/devicetree/bindings/power/avs/mtk_svs.yaml b/Documentation/devicetree/bindings/power/avs/mtk_svs.yaml new file mode 100644 index 000000000000..77ab606814ce --- /dev/null +++ b/Documentation/devicetree/bindings/power/avs/mtk_svs.yaml @@ -0,0 +1,141 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/power/avs/mtk_svs.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Introduce SVS engine + +maintainers: + - Kevin Hilman <khilman@xxxxxxxxxx> + - Nishanth Menon <nm@xxxxxx> + +description: |+ + The SVS (Smart Voltage Scaling) engine is a piece of hardware which is + used to calculate optimized voltage values of several power domains, + e.g. CPU/GPU/CCI, according to chip process corner, temperatures, + and other factors. Then DVFS driver could apply those optimized voltage + values to reduce power consumption. + +properties: + compatible: + const: mediatek,mt8183-svs + + reg: + description: Address range of the MTK SVS controller. + maxItems: 1 + + interrupts: + description: IRQ for the MTK SVS controller. + maxItems: 1 + + clocks: + description: Main clock for svs controller to work. + + clock-names: + const: main + + nvmem-cells: + maxItems: 2 + description: + Phandle to the calibration data provided by a nvmem device. + + nvmem-cell-names: + items: + - const: svs-calibration-data + - const: calibration-data + +patternProperties: + "^svs-(cpu-little|cpu-big|cci|gpu)$": + type: object + description: + Each subnode represents one SVS bank. + - svs-cpu-little (SVS bank device node of little CPU) + - svs-cpu-big (SVS bank device node of big CPU) + - svs-cci (SVS bank device node of CCI) + - svs-gpu (SVS bank device node of GPU) + + properties: + compatible: + enum: + - mediatek,mt8183-svs-cpu-little + - mediatek,mt8183-svs-cpu-big + - mediatek,mt8183-svs-cci + - mediatek,mt8183-svs-gpu + + power-domains: + description: Phandle to the associated power domain + maxItems: 1 + + operating-points-v2: true + + vcpu-little-supply: + description: PMIC buck of little CPU + + vcpu-big-supply: + description: PMIC buck of big CPU + + vcci-supply: + description: PMIC buck of CCI + + vgpu-spply: + description: PMIC buck of GPU + + required: + - compatible + - operating-points-v2 + + additionalProperties: false + +required: + - compatible + - reg + - interrupts + - clocks + - clock-names + - nvmem-cells + - nvmem-cell-names + +additionalProperties: false + +examples: + - | + #include <dt-bindings/clock/mt8183-clk.h> + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/interrupt-controller/irq.h> + #include <dt-bindings/power/mt8183-power.h> + + svs: svs@1100b000 { + compatible = "mediatek,mt8183-svs"; + reg = <0 0x1100b000 0 0x1000>; + interrupts = <GIC_SPI 127 IRQ_TYPE_LEVEL_LOW>; + clocks = <&infracfg CLK_INFRA_THERM>; + clock-names = "main"; + nvmem-cells = <&svs_calibration>, <&thermal_calibration>; + nvmem-cell-names = "svs-calibration-data", "calibration-data"; + + svs_cpu_little: svs-cpu-little { + compatible = "mediatek,mt8183-svs-cpu-little"; + operating-points-v2 = <&cluster0_opp>; + vcpu-little-supply = <&mt6358_vproc12_reg>; + }; + + svs_cpu_big: svs-cpu-big { + compatible = "mediatek,mt8183-svs-cpu-big"; + operating-points-v2 = <&cluster1_opp>; + vcpu-big-supply = <&mt6358_vproc11_reg>; + }; + + svs_cci: svs-cci { + compatible = "mediatek,mt8183-svs-cci"; + operating-points-v2 = <&cci_opp>; + vcci-supply = <&mt6358_vproc12_reg>; + }; + + svs_gpu: svs-gpu { + compatible = "mediatek,mt8183-svs-gpu"; + power-domains = <&scpsys MT8183_POWER_DOMAIN_MFG_2D>; + operating-points-v2 = <&gpu_opp_table>; + vgpu-spply = <&mt6358_vgpu_reg>; + }; + }; -- 2.18.0
