ARM: dts: thermal: exynos: Add documentation for Exynos SoC thermal bindings
Proper description for Exynos4 bindings added to Documentation/devicetree/ bindings. It adds description to use multiple TMU instances, optional voltage supply node and optional shared register across multiple TMU's. Acked-by: Jonghwa Lee <jonghwa3.lee@samsung.com> Signed-off-by: Lukasz Majewski <l.majewski@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com> Acked-by: Eduardo Valentin <eduardo.valentin@ti.com> Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
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* 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,exynos4412-tmu"
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"samsung,exynos4210-tmu"
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"samsung,exynos5250-tmu"
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"samsung,exynos5440-tmu"
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- interrupt-parent : The phandle for the interrupt controller
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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 each instance of TMU and second set belongs to common TMU
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registers.
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- interrupts : Should contain interrupt for thermal system
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- clocks : The main clock for TMU device
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- clock-names : Thermal system clock name
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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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status = "disabled";
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vtmu-supply = <&tmu_regulator_node>;
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};
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Example 2):
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tmuctrl_0: tmuctrl@160118 {
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compatible = "samsung,exynos5440-tmu";
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reg = <0x160118 0x230>, <0x160368 0x10>;
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interrupts = <0 58 0>;
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clocks = <&clock 21>;
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clock-names = "tmu_apbif";
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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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