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Exynos5: FDT: Add TMU device node values

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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>
This commit is contained in:
Akshay Saraswat 2013-02-25 01:13:01 +00:00 committed by Minkyu Kang
parent 39d182d3de
commit 618766c098
5 changed files with 60 additions and 0 deletions
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5
arch/arm/dts/exynos5250.dtsi
View file

@ -151,4 +151,9 @@
};
};
tmu@10060000 {
compatible = "samsung,exynos-tmu";
reg = <0x10060000 0x10000>;
};
};

12
board/samsung/dts/exynos5250-smdk5250.dts
View file

@ -66,4 +66,16 @@
compatible = "maxim,max77686_pmic";
};
};
tmu@10060000 {
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>;
};
};

41
doc/device-tree-bindings/exynos/tmu.txt Normal file
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@ -0,0 +1,41 @@
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>;
};

1
include/fdtdec.h
View file

@ -80,6 +80,7 @@ enum fdt_compat_id {
COMPAT_SAMSUNG_EXYNOS_SPI, /* Exynos SPI */
COMPAT_SAMSUNG_EXYNOS_EHCI, /* Exynos EHCI controller */
COMPAT_SAMSUNG_EXYNOS_USB_PHY, /* Exynos phy controller for usb2.0 */
COMPAT_SAMSUNG_EXYNOS_TMU, /* Exynos TMU */
COMPAT_MAXIM_MAX77686_PMIC, /* MAX77686 PMIC */
COMPAT_MAXIM_98095_CODEC, /* MAX98095 Codec */

1
lib/fdtdec.c
View file

@ -55,6 +55,7 @@ static const char * const compat_names[COMPAT_COUNT] = {
COMPAT(SAMSUNG_EXYNOS_SPI, "samsung,exynos-spi"),
COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"),
COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"),
COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
};