1* Exynos Thermal Management Unit (TMU) 2 3** Required properties: 4 5- compatible : One of the following: 6 "samsung,exynos3250-tmu" 7 "samsung,exynos4412-tmu" 8 "samsung,exynos4210-tmu" 9 "samsung,exynos5250-tmu" 10 "samsung,exynos5260-tmu" 11 "samsung,exynos5420-tmu" for TMU channel 0, 1 on Exynos5420 12 "samsung,exynos5420-tmu-ext-triminfo" for TMU channels 2, 3 and 4 13 Exynos5420 (Must pass triminfo base and triminfo clock) 14 "samsung,exynos5433-tmu" 15 "samsung,exynos7-tmu" 16- reg : Address range of the thermal registers. For soc's which has multiple 17 instances of TMU and some registers are shared across all TMU's like 18 interrupt related then 2 set of register has to supplied. First set 19 belongs to register set of TMU instance and second set belongs to 20 registers shared with the TMU instance. 21 22 NOTE: On Exynos5420, the TRIMINFO register is misplaced for TMU 23 channels 2, 3 and 4 24 Use "samsung,exynos5420-tmu-ext-triminfo" in cases, there is a misplaced 25 register, also provide clock to access that base. 26 27 TRIMINFO at 0x1006c000 contains data for TMU channel 3 28 TRIMINFO at 0x100a0000 contains data for TMU channel 4 29 TRIMINFO at 0x10068000 contains data for TMU channel 2 30 31- interrupts : Should contain interrupt for thermal system 32- clocks : The main clocks for TMU device 33 -- 1. operational clock for TMU channel 34 -- 2. optional clock to access the shared registers of TMU channel 35 -- 3. optional special clock for functional operation 36- clock-names : Thermal system clock name 37 -- "tmu_apbif" operational clock for current TMU channel 38 -- "tmu_triminfo_apbif" clock to access the shared triminfo register 39 for current TMU channel 40 -- "tmu_sclk" clock for functional operation of the current TMU 41 channel 42 43The Exynos TMU supports generating interrupts when reaching given 44temperature thresholds. Number of supported thermal trip points depends 45on the SoC (only first trip points defined in DT will be configured): 46 - most of SoC: 4 47 - samsung,exynos5433-tmu: 8 48 - samsung,exynos7-tmu: 8 49 50** Optional properties: 51 52- vtmu-supply: This entry is optional and provides the regulator node supplying 53 voltage to TMU. If needed this entry can be placed inside 54 board/platform specific dts file. 55 56Example 1): 57 58 tmu@100c0000 { 59 compatible = "samsung,exynos4412-tmu"; 60 interrupt-parent = <&combiner>; 61 reg = <0x100C0000 0x100>; 62 interrupts = <2 4>; 63 clocks = <&clock 383>; 64 clock-names = "tmu_apbif"; 65 vtmu-supply = <&tmu_regulator_node>; 66 #thermal-sensor-cells = <0>; 67 }; 68 69Example 2): (In case of Exynos5420 "with misplaced TRIMINFO register") 70 tmu_cpu2: tmu@10068000 { 71 compatible = "samsung,exynos5420-tmu-ext-triminfo"; 72 reg = <0x10068000 0x100>, <0x1006c000 0x4>; 73 interrupts = <0 184 0>; 74 clocks = <&clock 318>, <&clock 318>; 75 clock-names = "tmu_apbif", "tmu_triminfo_apbif"; 76 #thermal-sensor-cells = <0>; 77 }; 78 79 tmu_cpu3: tmu@1006c000 { 80 compatible = "samsung,exynos5420-tmu-ext-triminfo"; 81 reg = <0x1006c000 0x100>, <0x100a0000 0x4>; 82 interrupts = <0 185 0>; 83 clocks = <&clock 318>, <&clock 319>; 84 clock-names = "tmu_apbif", "tmu_triminfo_apbif"; 85 #thermal-sensor-cells = <0>; 86 }; 87 88 tmu_gpu: tmu@100a0000 { 89 compatible = "samsung,exynos5420-tmu-ext-triminfo"; 90 reg = <0x100a0000 0x100>, <0x10068000 0x4>; 91 interrupts = <0 215 0>; 92 clocks = <&clock 319>, <&clock 318>; 93 clock-names = "tmu_apbif", "tmu_triminfo_apbif"; 94 #thermal-sensor-cells = <0>; 95 }; 96 97Note: For multi-instance tmu each instance should have an alias correctly 98numbered in "aliases" node. 99 100Example: 101 102aliases { 103 tmuctrl0 = &tmuctrl_0; 104 tmuctrl1 = &tmuctrl_1; 105 tmuctrl2 = &tmuctrl_2; 106}; 107