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Exynos Thermal management Unit
Required properties:
- compatible : Should be "samsung,exynos-tmu" for TMU
- samsung,min-temp : Minimum temperature value (25 degree celsius)
- Current temperature of SoC should be more than this value.
- samsung,max-temp : Maximum temperature value (125 degree celsius)
- Current temperature of SoC should be less than this value.
- samsung,start-warning : Temperature at which TMU starts giving warning (degree celsius)
- samsung,start-tripping : Temperature at which TMU shuts down the system (degree celsius)
- samsung,hw-tripping : Temperature at which hardware tripping should happen
in case TMU fails to power off (degree celsius)
- samsung,efuse-min-value : SOC efuse min value (Constant 40)
- efuse-value should be more than this value.
- samsung,efuse-value : SOC actual efuse value (Literal value)
- This is the data trimming info.
- This value is used to calculate measuring error.
- samsung,efuse-max-value : SoC max efuse value (Constant 100)
- efuse-value should be less than this value.
- samsung,slope : Default value 274761730 (Constant 0x1060_8802).
- This is the default value for TMU_CONTROL register.
- It sets the gain of amplifier to the positive-tc generator block.
- It selects thermal tripping mode and enables thermal tripping.
- samsung,dc-value : Measured data calibration value (Constant 25)
- Used for tempearture calculation.
- This is 25 because temperature measured is always above 25 degrees.
Example:
tmu@10060000 {
compatible = "samsung,exynos-tmu"
samsung,min-temp = <25>;
samsung,max-temp = <125>;
samsung,start-warning = <95>;
samsung,start-tripping = <105>;
samsung,hw-tripping = <110>;
samsung,efuse-min-value = <40>;
samsung,efuse-value = <55>;
samsung,efuse-max-value = <100>;
samsung,slope = <274761730>;
samsung,dc-value = <25>;
};
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