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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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@ -151,4 +151,9 @@
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};
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};
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tmu@10060000 {
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compatible = "samsung,exynos-tmu";
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reg = <0x10060000 0x10000>;
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};
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};
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@ -66,4 +66,16 @@
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compatible = "maxim,max77686_pmic";
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};
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};
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tmu@10060000 {
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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,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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};
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41
doc/device-tree-bindings/exynos/tmu.txt
Normal file
41
doc/device-tree-bindings/exynos/tmu.txt
Normal file
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@ -0,0 +1,41 @@
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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 system will trip and shutdown (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,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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@ -80,6 +80,7 @@ enum fdt_compat_id {
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COMPAT_SAMSUNG_EXYNOS_SPI, /* Exynos SPI */
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COMPAT_SAMSUNG_EXYNOS_EHCI, /* Exynos EHCI controller */
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COMPAT_SAMSUNG_EXYNOS_USB_PHY, /* Exynos phy controller for usb2.0 */
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COMPAT_SAMSUNG_EXYNOS_TMU, /* Exynos TMU */
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COMPAT_MAXIM_MAX77686_PMIC, /* MAX77686 PMIC */
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COMPAT_MAXIM_98095_CODEC, /* MAX98095 Codec */
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@ -55,6 +55,7 @@ static const char * const compat_names[COMPAT_COUNT] = {
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COMPAT(SAMSUNG_EXYNOS_SPI, "samsung,exynos-spi"),
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COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"),
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COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
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COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
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COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"),
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COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
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};
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