xref: /linux/Documentation/devicetree/bindings/thermal/samsung,exynos-thermal.yaml (revision e7d759f31ca295d589f7420719c311870bb3166f) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/thermal/samsung,exynos-thermal.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Samsung Exynos SoC Thermal Management Unit (TMU)
8
9maintainers:
10  - Krzysztof Kozlowski <krzk@kernel.org>
11
12description: |
13  For multi-instance tmu each instance should have an alias correctly numbered
14  in "aliases" node.
15
16properties:
17  compatible:
18    enum:
19      - samsung,exynos3250-tmu
20      - samsung,exynos4412-tmu
21      - samsung,exynos4210-tmu
22      - samsung,exynos5250-tmu
23      - samsung,exynos5260-tmu
24        # For TMU channel 0, 1 on Exynos5420:
25      - samsung,exynos5420-tmu
26        # For TMU channels 2, 3 and 4 of Exynos5420:
27      - samsung,exynos5420-tmu-ext-triminfo
28      - samsung,exynos5433-tmu
29      - samsung,exynos7-tmu
30
31  clocks:
32    minItems: 1
33    maxItems: 3
34
35  clock-names:
36    minItems: 1
37    maxItems: 3
38
39  interrupts:
40    description: |
41      The Exynos TMU supports generating interrupts when reaching given
42      temperature thresholds. Number of supported thermal trip points depends
43      on the SoC (only first trip points defined in DT will be configured)::
44       - most of SoC: 4
45       - samsung,exynos5433-tmu: 8
46       - samsung,exynos7-tmu: 8
47    maxItems: 1
48
49  reg:
50    items:
51      - description: TMU instance registers.
52      - description: |
53          Shared TMU registers.
54
55          Note:: On Exynos5420, the TRIMINFO register is misplaced for TMU
56          channels 2, 3 and 4 Use "samsung,exynos5420-tmu-ext-triminfo" in
57          cases, there is a misplaced register, also provide clock to access
58          that base.
59          TRIMINFO at 0x1006c000 contains data for TMU channel 3
60          TRIMINFO at 0x100a0000 contains data for TMU channel 4
61          TRIMINFO at 0x10068000 contains data for TMU channel 2
62    minItems: 1
63
64  '#thermal-sensor-cells': true
65
66  vtmu-supply:
67    description: The regulator node supplying voltage to TMU.
68
69required:
70  - compatible
71  - clocks
72  - clock-names
73  - interrupts
74  - reg
75
76allOf:
77  - $ref: /schemas/thermal/thermal-sensor.yaml
78  - if:
79      properties:
80        compatible:
81          contains:
82            const: samsung,exynos5420-tmu-ext-triminfo
83    then:
84      properties:
85        clocks:
86          items:
87            - description:
88                Operational clock for TMU channel.
89            - description:
90                Optional clock to access the shared registers (e.g. TRIMINFO) of TMU
91                channel.
92        clock-names:
93          items:
94            - const: tmu_apbif
95            - const: tmu_triminfo_apbif
96        reg:
97          minItems: 2
98          maxItems: 2
99  - if:
100      properties:
101        compatible:
102          contains:
103            enum:
104              - samsung,exynos5433-tmu
105              - samsung,exynos7-tmu
106    then:
107      properties:
108        clocks:
109          items:
110            - description:
111                Operational clock for TMU channel.
112            - description:
113                Optional special clock for functional operation of TMU channel.
114        clock-names:
115          items:
116            - const: tmu_apbif
117            - const: tmu_sclk
118        reg:
119          minItems: 1
120          maxItems: 1
121
122  - if:
123      properties:
124        compatible:
125          contains:
126            enum:
127              - samsung,exynos3250-tmu
128              - samsung,exynos4412-tmu
129              - samsung,exynos4210-tmu
130              - samsung,exynos5250-tmu
131              - samsung,exynos5260-tmu
132              - samsung,exynos5420-tmu
133    then:
134      properties:
135        clocks:
136          minItems: 1
137          maxItems: 1
138        reg:
139          minItems: 1
140          maxItems: 1
141
142additionalProperties: false
143
144examples:
145  - |
146    #include <dt-bindings/clock/exynos4.h>
147
148    tmu@100c0000 {
149        compatible = "samsung,exynos4412-tmu";
150        reg = <0x100C0000 0x100>;
151        interrupt-parent = <&combiner>;
152        interrupts = <2 4>;
153        #thermal-sensor-cells = <0>;
154        clocks = <&clock CLK_TMU_APBIF>;
155        clock-names = "tmu_apbif";
156        vtmu-supply = <&ldo10_reg>;
157    };
158
159  - |
160    #include <dt-bindings/interrupt-controller/arm-gic.h>
161
162    tmu@10068000 {
163        compatible = "samsung,exynos5420-tmu-ext-triminfo";
164        reg = <0x10068000 0x100>, <0x1006c000 0x4>;
165        interrupts = <GIC_SPI 184 IRQ_TYPE_LEVEL_HIGH>;
166        #thermal-sensor-cells = <0>;
167        clocks = <&clock 318>, <&clock 318>; /* CLK_TMU */
168        clock-names = "tmu_apbif", "tmu_triminfo_apbif";
169        vtmu-supply = <&ldo7_reg>;
170    };
171
172  - |
173    #include <dt-bindings/interrupt-controller/arm-gic.h>
174
175    tmu@10060000 {
176        compatible = "samsung,exynos5433-tmu";
177        reg = <0x10060000 0x200>;
178        interrupts = <GIC_SPI 95 IRQ_TYPE_LEVEL_HIGH>;
179        #thermal-sensor-cells = <0>;
180        clocks = <&cmu_peris 3>, /* CLK_PCLK_TMU0_APBIF */
181                 <&cmu_peris 35>; /* CLK_SCLK_TMU0 */
182        clock-names = "tmu_apbif", "tmu_sclk";
183        vtmu-supply = <&ldo3_reg>;
184    };
185