| * Mediatek Smart Voltage Scaling (MTK SVS) |
| |
| This describes the device tree binding for the MTK SVS controller (bank) |
| which helps provide the optimized CPU/GPU/CCI voltages. This device also |
| needs thermal data to calculate thermal slope for accurately compensate |
| the voltages when temperature change. |
| |
| Required properties: |
| - compatible: |
| - "mediatek,mt8183-svs" : For MT8183 family of SoCs |
| - reg: Address range of the MTK SVS controller. |
| - interrupts: IRQ for the MTK SVS controller. |
| - clocks, clock-names: Clocks needed for the svs controller. required |
| clocks are: |
| "main_clk": Main clock needed for register access |
| - nvmem-cells: Phandle to the calibration data provided by a nvmem device. |
| - nvmem-cell-names: Should be "svs-calibration-data" and "calibration-data" |
| |
| Subnodes: |
| - svs_cpu_little: SVS bank device node of little CPU |
| compatible: "mediatek,mt8183-svs-cpu-little" |
| operating-points-v2: OPP table hooked by SVS little CPU bank. |
| SVS will optimze this OPP table voltage part. |
| vcpu-little-supply: PMIC buck of little CPU |
| - svs_cpu_big: SVS bank device node of big CPU |
| compatible: "mediatek,mt8183-svs-cpu-big" |
| operating-points-v2: OPP table hooked by SVS big CPU bank. |
| SVS will optimze this OPP table voltage part. |
| vcpu-big-supply: PMIC buck of big CPU |
| - svs_cci: SVS bank device node of CCI |
| compatible: "mediatek,mt8183-svs-cci" |
| operating-points-v2: OPP table hooked by SVS CCI bank. |
| SVS will optimze this OPP table voltage part. |
| vcci-supply: PMIC buck of CCI |
| - svs_gpu: SVS bank device node of GPU |
| compatible: "mediatek,mt8183-svs-gpu" |
| operating-points-v2: OPP table hooked by SVS GPU bank. |
| SVS will optimze this OPP table voltage part. |
| vgpu-spply: PMIC buck of GPU |
| |
| Example: |
| |
| svs: svs@1100b000 { |
| compatible = "mediatek,mt8183-svs"; |
| reg = <0 0x1100b000 0 0x1000>; |
| interrupts = <GIC_SPI 127 IRQ_TYPE_LEVEL_LOW 0>; |
| clocks = <&infracfg CLK_INFRA_THERM>; |
| clock-names = "main_clk"; |
| 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>; |
| }; |
| |
| svs_cpu_big: svs_cpu_big { |
| compatible = "mediatek,mt8183-svs-cpu-big"; |
| operating-points-v2 = <&cluster1_opp>; |
| }; |
| |
| svs_cci: svs_cci { |
| compatible = "mediatek,mt8183-svs-cci"; |
| operating-points-v2 = <&cci_opp>; |
| }; |
| |
| svs_gpu: svs_gpu { |
| compatible = "mediatek,mt8183-svs-gpu"; |
| power-domains = <&scpsys MT8183_POWER_DOMAIN_MFG_2D>; |
| operating-points-v2 = <&gpu_opp_table>; |
| }; |
| }; |
| |
| &svs_cpu_little { |
| vcpu-little-supply = <&mt6358_vproc12_reg>; |
| }; |
| |
| &svs_cpu_big { |
| vcpu-big-supply = <&mt6358_vproc11_reg>; |
| }; |
| |
| &svs_cci { |
| vcci-supply = <&mt6358_vproc12_reg>; |
| }; |
| |
| &svs_gpu { |
| vgpu-spply = <&mt6358_vgpu_reg>; |
| }; |
