mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-26 21:13:48 +00:00
871333fcfe
This adds a member to TMU FDT node for providing hardware tripping temperature threshold. Signed-off-by: Akshay Saraswat <akshay.s@samsung.com> Acked-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
44 lines
1.8 KiB
Text
44 lines
1.8 KiB
Text
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>;
|
|
};
|