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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
commit618766c09855f7167f510eafa89172ae44cae543 (patch)
treee763fe6051906d55b2cf25d5eba839d65b98fa8c
parent39d182d3de5dcfaeb7d6997be4ab764081ff529e (diff)
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>
-rw-r--r--arch/arm/dts/exynos5250.dtsi5
-rw-r--r--board/samsung/dts/exynos5250-smdk5250.dts12
-rw-r--r--doc/device-tree-bindings/exynos/tmu.txt41
-rw-r--r--include/fdtdec.h1
-rw-r--r--lib/fdtdec.c1
5 files changed, 60 insertions, 0 deletions
diff --git a/arch/arm/dts/exynos5250.dtsi b/arch/arm/dts/exynos5250.dtsi
index ed8c8dd6063..61d35a83eac 100644
--- a/arch/arm/dts/exynos5250.dtsi
+++ b/arch/arm/dts/exynos5250.dtsi
@@ -151,4 +151,9 @@
};
};
+ tmu@10060000 {
+ compatible = "samsung,exynos-tmu";
+ reg = <0x10060000 0x10000>;
+ };
+
};
diff --git a/board/samsung/dts/exynos5250-smdk5250.dts b/board/samsung/dts/exynos5250-smdk5250.dts
index cbfab6f97fb..00dac40b398 100644
--- a/board/samsung/dts/exynos5250-smdk5250.dts
+++ b/board/samsung/dts/exynos5250-smdk5250.dts
@@ -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>;
+ };
};
diff --git a/doc/device-tree-bindings/exynos/tmu.txt b/doc/device-tree-bindings/exynos/tmu.txt
new file mode 100644
index 00000000000..bb734dcaca3
--- /dev/null
+++ b/doc/device-tree-bindings/exynos/tmu.txt
@@ -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>;
+};
diff --git a/include/fdtdec.h b/include/fdtdec.h
index b885a9578f5..65529421165 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -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 */
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index 9a527ffd827..88f6b68270b 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -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"),
};