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>

diff --git a/arch/arm/dts/exynos5250.dtsi b/arch/arm/dts/exynos5250.dtsi
index ed8c8dd6063ca94aa35de097bf4b73ec4f8747e1..61d35a83eacdc28c20ce0dd0b7f729a8efb4d10d 100644 (file)
--- 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 cbfab6f97fbbc9c76fd633ebedc4f80672dbbdde..00dac40b3980ce250dc1bf04e4de1a8cb412a2d6 100644 (file)
--- 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 (file)
index 0000000..bb734dc
--- /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 b885a9578f58cb2852e1611bd9b397dcab753bc1..6552942116562a56cb5a854942ce40e335bbfe90 100644 (file)
--- 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 9a527ffd8271fa779d337118437d7c7e582f1199..88f6b68270bb534173359749f071828d96a66c1c 100644 (file)
--- 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"),
 };