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authorAkshay Saraswat <akshay.s@samsung.com>2013-02-25 01:13:01 +0000
committerMinkyu Kang <mk7.kang@samsung.com>2013-03-12 17:06:06 +0900
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Exynos5: FDT: Add TMU device node values
Fdt entry for Exynos TMU driver specific pre-defined values used for calibration of current temperature and defining threshold values. 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>
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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 system will trip and shutdown (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,efuse-min-value = <40>;
+ samsung,efuse-value = <55>;
+ samsung,efuse-max-value = <100>;
+ samsung,slope = <274761730>;
+ samsung,dc-value = <25>;
+};