107 lines
3.6 KiB
Plaintext
Executable file
107 lines
3.6 KiB
Plaintext
Executable file
* Exynos Thermal Management Unit (TMU)
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** Required properties:
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- compatible : One of the following:
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"samsung,exynos3250-tmu"
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"samsung,exynos4412-tmu"
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"samsung,exynos4210-tmu"
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"samsung,exynos5250-tmu"
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"samsung,exynos5260-tmu"
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"samsung,exynos5420-tmu" for TMU channel 0, 1 on Exynos5420
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"samsung,exynos5420-tmu-ext-triminfo" for TMU channels 2, 3 and 4
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Exynos5420 (Must pass triminfo base and triminfo clock)
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"samsung,exynos5433-tmu"
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"samsung,exynos7-tmu"
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- reg : Address range of the thermal registers. For soc's which has multiple
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instances of TMU and some registers are shared across all TMU's like
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interrupt related then 2 set of register has to supplied. First set
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belongs to register set of TMU instance and second set belongs to
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registers shared with the TMU instance.
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NOTE: On Exynos5420, the TRIMINFO register is misplaced for TMU
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channels 2, 3 and 4
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Use "samsung,exynos5420-tmu-ext-triminfo" in cases, there is a misplaced
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register, also provide clock to access that base.
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TRIMINFO at 0x1006c000 contains data for TMU channel 3
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TRIMINFO at 0x100a0000 contains data for TMU channel 4
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TRIMINFO at 0x10068000 contains data for TMU channel 2
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- interrupts : Should contain interrupt for thermal system
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- clocks : The main clocks for TMU device
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-- 1. operational clock for TMU channel
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-- 2. optional clock to access the shared registers of TMU channel
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-- 3. optional special clock for functional operation
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- clock-names : Thermal system clock name
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-- "tmu_apbif" operational clock for current TMU channel
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-- "tmu_triminfo_apbif" clock to access the shared triminfo register
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for current TMU channel
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-- "tmu_sclk" clock for functional operation of the current TMU
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channel
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The Exynos TMU supports generating interrupts when reaching given
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temperature thresholds. Number of supported thermal trip points depends
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on the SoC (only first trip points defined in DT will be configured):
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- most of SoC: 4
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- samsung,exynos5433-tmu: 8
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- samsung,exynos7-tmu: 8
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** Optional properties:
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- vtmu-supply: This entry is optional and provides the regulator node supplying
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voltage to TMU. If needed this entry can be placed inside
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board/platform specific dts file.
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Example 1):
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tmu@100c0000 {
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compatible = "samsung,exynos4412-tmu";
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interrupt-parent = <&combiner>;
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reg = <0x100C0000 0x100>;
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interrupts = <2 4>;
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clocks = <&clock 383>;
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clock-names = "tmu_apbif";
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vtmu-supply = <&tmu_regulator_node>;
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#thermal-sensor-cells = <0>;
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};
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Example 2): (In case of Exynos5420 "with misplaced TRIMINFO register")
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tmu_cpu2: tmu@10068000 {
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compatible = "samsung,exynos5420-tmu-ext-triminfo";
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reg = <0x10068000 0x100>, <0x1006c000 0x4>;
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interrupts = <0 184 0>;
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clocks = <&clock 318>, <&clock 318>;
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clock-names = "tmu_apbif", "tmu_triminfo_apbif";
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#thermal-sensor-cells = <0>;
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};
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tmu_cpu3: tmu@1006c000 {
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compatible = "samsung,exynos5420-tmu-ext-triminfo";
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reg = <0x1006c000 0x100>, <0x100a0000 0x4>;
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interrupts = <0 185 0>;
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clocks = <&clock 318>, <&clock 319>;
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clock-names = "tmu_apbif", "tmu_triminfo_apbif";
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#thermal-sensor-cells = <0>;
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};
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tmu_gpu: tmu@100a0000 {
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compatible = "samsung,exynos5420-tmu-ext-triminfo";
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reg = <0x100a0000 0x100>, <0x10068000 0x4>;
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interrupts = <0 215 0>;
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clocks = <&clock 319>, <&clock 318>;
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clock-names = "tmu_apbif", "tmu_triminfo_apbif";
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#thermal-sensor-cells = <0>;
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};
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Note: For multi-instance tmu each instance should have an alias correctly
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numbered in "aliases" node.
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Example:
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aliases {
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tmuctrl0 = &tmuctrl_0;
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tmuctrl1 = &tmuctrl_1;
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tmuctrl2 = &tmuctrl_2;
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};
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