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📄 88pg86x.txt(530 B)
📄 88pm800.txt(1.07 KB)
📄 88pm860x.txt(752 B)
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📄 act8945a-regulator.txt(3.25 KB)
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📄 mt6311-regulator.txt(891 B)
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📄 mt6380-regulator.txt(2.24 KB)
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📄 nvidia,tegra-regulators-coupling.txt(1.98 KB)
📄 nxp,pca9450-regulator.yaml(5.89 KB)
📄 onnn,fan53880.yaml(1.82 KB)
📄 palmas-pmic.txt(2.82 KB)
📄 pbias-regulator.txt(1.02 KB)
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📄 regulator-max77620.txt(6.86 KB)
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📄 rohm,bd70528-regulator.txt(1.8 KB)
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📄 sy8106a-regulator.txt(630 B)
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📄 ti-abb-regulator.txt(5.39 KB)
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📄 tps6586x.txt(3.49 KB)
📄 twl-regulator.txt(2.67 KB)
📄 uniphier-regulator.txt(1.83 KB)
📄 vctrl.txt(1.8 KB)
📄 vexpress.txt(923 B)
📄 vqmmc-ipq4019-regulator.yaml(930 B)
📄 wlf,arizona.yaml(1.02 KB)

Editing: nvidia,tegra-regulators-coupling.txt

NVIDIA Tegra Regulators Coupling
================================

NVIDIA Tegra SoC's have a mandatory voltage-coupling between regulators.
Thus on Tegra20 there are 3 coupled regulators and on NVIDIA Tegra30
there are 2.

Tegra20 voltage coupling
------------------------

On Tegra20 SoC's there are 3 coupled regulators: CORE, RTC and CPU.
The CORE and RTC voltages shall be in a range of 170mV from each other
and they both shall be higher than the CPU voltage by at least 120mV.

Tegra30 voltage coupling
------------------------

On Tegra30 SoC's there are 2 coupled regulators: CORE and CPU. The CORE
and CPU voltages shall be in a range of 300mV from each other and CORE
voltage shall be higher than the CPU by N mV, where N depends on the CPU
voltage.

Required properties:
- nvidia,tegra-core-regulator: Boolean property that designates regulator
  as the "Core domain" voltage regulator.
- nvidia,tegra-rtc-regulator: Boolean property that designates regulator
  as the "RTC domain" voltage regulator.
- nvidia,tegra-cpu-regulator: Boolean property that designates regulator
  as the "CPU domain" voltage regulator.

Example:

pmic {
		regulators {
			core_vdd_reg: core {
				regulator-name = "vdd_core";
				regulator-min-microvolt = <950000>;
				regulator-max-microvolt = <1300000>;
				regulator-coupled-with = <&rtc_vdd_reg &cpu_vdd_reg>;
				regulator-coupled-max-spread = <170000 550000>;

nvidia,tegra-core-regulator;
			};

rtc_vdd_reg: rtc {
				regulator-name = "vdd_rtc";
				regulator-min-microvolt = <950000>;
				regulator-max-microvolt = <1300000>;
				regulator-coupled-with = <&core_vdd_reg &cpu_vdd_reg>;
				regulator-coupled-max-spread = <170000 550000>;

nvidia,tegra-rtc-regulator;
			};

cpu_vdd_reg: cpu {
				regulator-name = "vdd_cpu";
				regulator-min-microvolt = <750000>;
				regulator-max-microvolt = <1125000>;
				regulator-coupled-with = <&core_vdd_reg &rtc_vdd_reg>;
				regulator-coupled-max-spread = <550000 550000>;

nvidia,tegra-cpu-regulator;
			};
		};
	};

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Editing: nvidia,tegra-regulators-coupling.txt

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