xref: /OK3568_Linux_fs/u-boot/doc/device-tree-bindings/exynos/tmu.txt (revision 4882a59341e53eb6f0b4789bf948001014eff981)

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>;
};