* 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>;
	};