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Diffstat (limited to 'kernel/Documentation/devicetree/bindings/thermal/exynos-thermal.txt')
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1 files changed, 121 insertions, 0 deletions
diff --git a/kernel/Documentation/devicetree/bindings/thermal/exynos-thermal.txt b/kernel/Documentation/devicetree/bindings/thermal/exynos-thermal.txt new file mode 100644 index 000000000..695150a41 --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/thermal/exynos-thermal.txt @@ -0,0 +1,121 @@ +* Exynos Thermal Management Unit (TMU) + +** Required properties: + +- compatible : One of the following: + "samsung,exynos3250-tmu" + "samsung,exynos4412-tmu" + "samsung,exynos4210-tmu" + "samsung,exynos5250-tmu" + "samsung,exynos5260-tmu" + "samsung,exynos5420-tmu" for TMU channel 0, 1 on Exynos5420 + "samsung,exynos5420-tmu-ext-triminfo" for TMU channels 2, 3 and 4 + Exynos5420 (Must pass triminfo base and triminfo clock) + "samsung,exynos5440-tmu" + "samsung,exynos7-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 register set of TMU instance and second set belongs to + registers shared with the TMU instance. + + NOTE: On Exynos5420, the TRIMINFO register is misplaced for TMU + channels 2, 3 and 4 + Use "samsung,exynos5420-tmu-ext-triminfo" in cases, there is a misplaced + register, also provide clock to access that base. + + TRIMINFO at 0x1006c000 contains data for TMU channel 3 + TRIMINFO at 0x100a0000 contains data for TMU channel 4 + TRIMINFO at 0x10068000 contains data for TMU channel 2 + +- interrupts : Should contain interrupt for thermal system +- clocks : The main clocks for TMU device + -- 1. operational clock for TMU channel + -- 2. optional clock to access the shared registers of TMU channel + -- 3. optional special clock for functional operation +- clock-names : Thermal system clock name + -- "tmu_apbif" operational clock for current TMU channel + -- "tmu_triminfo_apbif" clock to access the shared triminfo register + for current TMU channel + -- "tmu_sclk" clock for functional operation of the current TMU + channel +- 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. +Following properties are mandatory (depending on SoC): +- samsung,tmu_gain: Gain value for internal TMU operation. +- samsung,tmu_reference_voltage: Value of TMU IP block's reference voltage +- samsung,tmu_noise_cancel_mode: Mode for noise cancellation +- samsung,tmu_efuse_value: Default level of temperature - it is needed when + in factory fusing produced wrong value +- samsung,tmu_min_efuse_value: Minimum temperature fused value +- samsung,tmu_max_efuse_value: Maximum temperature fused value +- samsung,tmu_first_point_trim: First point trimming value +- samsung,tmu_second_point_trim: Second point trimming value +- samsung,tmu_default_temp_offset: Default temperature offset +- samsung,tmu_cal_type: Callibration type + +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>; + #include "exynos4412-tmu-sensor-conf.dtsi" + }; + +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"; + #include "exynos5440-tmu-sensor-conf.dtsi" + }; + +Example 3): (In case of Exynos5420 "with misplaced TRIMINFO register") + tmu_cpu2: tmu@10068000 { + compatible = "samsung,exynos5420-tmu-ext-triminfo"; + reg = <0x10068000 0x100>, <0x1006c000 0x4>; + interrupts = <0 184 0>; + clocks = <&clock 318>, <&clock 318>; + clock-names = "tmu_apbif", "tmu_triminfo_apbif"; + #include "exynos4412-tmu-sensor-conf.dtsi" + }; + + tmu_cpu3: tmu@1006c000 { + compatible = "samsung,exynos5420-tmu-ext-triminfo"; + reg = <0x1006c000 0x100>, <0x100a0000 0x4>; + interrupts = <0 185 0>; + clocks = <&clock 318>, <&clock 319>; + clock-names = "tmu_apbif", "tmu_triminfo_apbif"; + #include "exynos4412-tmu-sensor-conf.dtsi" + }; + + tmu_gpu: tmu@100a0000 { + compatible = "samsung,exynos5420-tmu-ext-triminfo"; + reg = <0x100a0000 0x100>, <0x10068000 0x4>; + interrupts = <0 215 0>; + clocks = <&clock 319>, <&clock 318>; + clock-names = "tmu_apbif", "tmu_triminfo_apbif"; + #include "exynos4412-tmu-sensor-conf.dtsi" + }; + +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; +}; |