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