Merge branch 'for_3.12/exynos' of git://git.kernel.org/pub/scm/linux/…

…kernel/git/evalenti/linux-soc-thermal into exynos

Documentation/devicetree/bindings/thermal/exynos-thermal.txt

@@ -0,0 +1,55 @@
+* Exynos Thermal Management Unit (TMU)
+
+** Required properties:
+
+- compatible : One of the following:
+	       "samsung,exynos4412-tmu"
+	       "samsung,exynos4210-tmu"
+	       "samsung,exynos5250-tmu"
+	       "samsung,exynos5440-tmu"
+- interrupt-parent : The phandle for the interrupt controller
+- reg : Address range of the thermal registers. For soc's which has multiple
+	instances of TMU and some registers are shared across all TMU's like
+	interrupt related then 2 set of register has to supplied. First set
+	belongs	to each instance of TMU and second set belongs to common TMU
+	registers.
+- interrupts : Should contain interrupt for thermal system
+- clocks : The main clock for TMU device
+- clock-names : Thermal system clock name
+- vtmu-supply: This entry is optional and provides the regulator node supplying
+		voltage to TMU. If needed this entry can be placed inside
+		board/platform specific dts file.
+
+Example 1):
+
+	tmu@100C0000 {
+		compatible = "samsung,exynos4412-tmu";
+		interrupt-parent = <&combiner>;
+		reg = <0x100C0000 0x100>;
+		interrupts = <2 4>;
+		clocks = <&clock 383>;
+		clock-names = "tmu_apbif";
+		status = "disabled";
+		vtmu-supply = <&tmu_regulator_node>;
+	};
+
+Example 2):
+
+	tmuctrl_0: tmuctrl@160118 {
+		compatible = "samsung,exynos5440-tmu";
+		reg = <0x160118 0x230>, <0x160368 0x10>;
+		interrupts = <0 58 0>;
+		clocks = <&clock 21>;
+		clock-names = "tmu_apbif";
+	};
+
+Note: For multi-instance tmu each instance should have an alias correctly
+numbered in "aliases" node.
+
+Example:
+
+aliases {
+	tmuctrl0 = &tmuctrl_0;
+	tmuctrl1 = &tmuctrl_1;
+	tmuctrl2 = &tmuctrl_2;
+};

Documentation/thermal/exynos_thermal

@@ -1,17 +1,17 @@
-Kernel driver exynos4_tmu
+Kernel driver exynos_tmu
 =================
 
 Supported chips:
-* ARM SAMSUNG EXYNOS4 series of SoC
-  Prefix: 'exynos4-tmu'
+* ARM SAMSUNG EXYNOS4, EXYNOS5 series of SoC
   Datasheet: Not publicly available
 
 Authors: Donggeun Kim <dg77.kim@samsung.com>
+Authors: Amit Daniel <amit.daniel@samsung.com>
 
-Description
------------
+TMU controller Description:
+---------------------------
 
-This driver allows to read temperature inside SAMSUNG EXYNOS4 series of SoC.
+This driver allows to read temperature inside SAMSUNG EXYNOS4/5 series of SoC.
 
 The chip only exposes the measured 8-bit temperature code value
 through a register.
@@ -34,9 +34,9 @@ The three equations are:
   TI2: Trimming info for 85 degree Celsius (stored at TRIMINFO register)
        Temperature code measured at 85 degree Celsius which is unchanged
 
-TMU(Thermal Management Unit) in EXYNOS4 generates interrupt
+TMU(Thermal Management Unit) in EXYNOS4/5 generates interrupt
 when temperature exceeds pre-defined levels.
-The maximum number of configurable threshold is four.
+The maximum number of configurable threshold is five.
 The threshold levels are defined as follows:
   Level_0: current temperature > trigger_level_0 + threshold
   Level_1: current temperature > trigger_level_1 + threshold
@@ -47,6 +47,31 @@ The threshold levels are defined as follows:
   through the corresponding registers.
 
 When an interrupt occurs, this driver notify kernel thermal framework
-with the function exynos4_report_trigger.
+with the function exynos_report_trigger.
 Although an interrupt condition for level_0 can be set,
 it can be used to synchronize the cooling action.
+
+TMU driver description:
+-----------------------
+
+The exynos thermal driver is structured as,
+
+					Kernel Core thermal framework
+				(thermal_core.c, step_wise.c, cpu_cooling.c)
+								^
+								|
+								|
+TMU configuration data -------> TMU Driver  <------> Exynos Core thermal wrapper
+(exynos_tmu_data.c)	      (exynos_tmu.c)	   (exynos_thermal_common.c)
+(exynos_tmu_data.h)	      (exynos_tmu.h)	   (exynos_thermal_common.h)
+
+a) TMU configuration data: This consist of TMU register offsets/bitfields
+		described through structure exynos_tmu_registers. Also several
+		other platform data (struct exynos_tmu_platform_data) members
+		are used to configure the TMU.
+b) TMU driver: This component initialises the TMU controller and sets different
+		thresholds. It invokes core thermal implementation with the call
+		exynos_report_trigger.
+c) Exynos Core thermal wrapper: This provides 3 wrapper function to use the
+		Kernel core thermal framework. They are exynos_unregister_thermal,
+		exynos_register_thermal and exynos_report_trigger.

drivers/thermal/Kconfig

@@ -114,14 +114,6 @@ config KIRKWOOD_THERMAL
 	  Support for the Kirkwood thermal sensor driver into the Linux thermal
 	  framework. Only kirkwood 88F6282 and 88F6283 have this sensor.
 
-config EXYNOS_THERMAL
-	tristate "Temperature sensor on Samsung EXYNOS"
-	depends on (ARCH_EXYNOS4 || ARCH_EXYNOS5)
-	depends on CPU_THERMAL
-	help
-	  If you say yes here you get support for TMU (Thermal Management
-	  Unit) on SAMSUNG EXYNOS series of SoC.
-
 config DOVE_THERMAL
 	tristate "Temperature sensor on Marvell Dove SoCs"
 	depends on ARCH_DOVE
@@ -184,4 +176,9 @@ menu "Texas Instruments thermal drivers"
 source "drivers/thermal/ti-soc-thermal/Kconfig"
 endmenu
 
+menu "Samsung thermal drivers"
+depends on PLAT_SAMSUNG
+source "drivers/thermal/samsung/Kconfig"
+endmenu
+
 endif

drivers/thermal/Makefile

@@ -17,7 +17,7 @@ thermal_sys-$(CONFIG_CPU_THERMAL)	+= cpu_cooling.o
 obj-$(CONFIG_SPEAR_THERMAL)	+= spear_thermal.o
 obj-$(CONFIG_RCAR_THERMAL)	+= rcar_thermal.o
 obj-$(CONFIG_KIRKWOOD_THERMAL)  += kirkwood_thermal.o
-obj-$(CONFIG_EXYNOS_THERMAL)	+= exynos_thermal.o
+obj-y				+= samsung/
 obj-$(CONFIG_DOVE_THERMAL)  	+= dove_thermal.o
 obj-$(CONFIG_DB8500_THERMAL)	+= db8500_thermal.o
 obj-$(CONFIG_ARMADA_THERMAL)	+= armada_thermal.o