Bindings/thermal/mediatek,lvts-thermal.yaml

   1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/thermal/mediatek,lvts-thermal.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: MediaTek SoC Low Voltage Thermal Sensor (LVTS)
   8
   9 maintainers:
  10   - Balsam CHIHI <bchihi@baylibre.com>
  11
  12 description: |
  13   LVTS is a thermal management architecture composed of three subsystems,
  14   a Sensing device - Thermal Sensing Micro Circuit Unit (TSMCU),
  15   a Converter - Low Voltage Thermal Sensor converter (LVTS), and
  16   a Digital controller (LVTS_CTRL).
  17
  18 properties:
  19   compatible:
  20     enum:
  21       - mediatek,mt7988-lvts-ap
  22       - mediatek,mt8192-lvts-ap
  23       - mediatek,mt8192-lvts-mcu
  24       - mediatek,mt8195-lvts-ap
  25       - mediatek,mt8195-lvts-mcu
  26
  27   reg:
  28     maxItems: 1
  29
  30   interrupts:
  31     maxItems: 1
  32
  33   clocks:
  34     maxItems: 1
  35
  36   resets:
  37     maxItems: 1
  38     description: LVTS reset for clearing temporary data on AP/MCU.
  39
  40   nvmem-cells:
  41     minItems: 1
  42     items:
  43       - description: Calibration eFuse data 1 for LVTS
  44       - description: Calibration eFuse data 2 for LVTS
  45
  46   nvmem-cell-names:
  47     minItems: 1
  48     items:
  49       - const: lvts-calib-data-1
  50       - const: lvts-calib-data-2
  51
  52   "#thermal-sensor-cells":
  53     const: 1
  54
  55 allOf:
  56   - $ref: thermal-sensor.yaml#
  57
  58   - if:
  59       properties:
  60         compatible:
  61           contains:
  62             enum:
  63               - mediatek,mt8192-lvts-ap
  64               - mediatek,mt8192-lvts-mcu
  65     then:
  66       properties:
  67         nvmem-cells:
  68           maxItems: 1
  69
  70         nvmem-cell-names:
  71           maxItems: 1
  72
  73   - if:
  74       properties:
  75         compatible:
  76           contains:
  77             enum:
  78               - mediatek,mt8195-lvts-ap
  79               - mediatek,mt8195-lvts-mcu
  80     then:
  81       properties:
  82         nvmem-cells:
  83           minItems: 2
  84
  85         nvmem-cell-names:
  86           minItems: 2
  87
  88 required:
  89   - compatible
  90   - reg
  91   - interrupts
  92   - clocks
  93   - resets
  94   - nvmem-cells
  95   - nvmem-cell-names
  96   - "#thermal-sensor-cells"
  97
  98 additionalProperties: false
  99
 100 examples:
 101   - |
 102     #include <dt-bindings/interrupt-controller/arm-gic.h>
 103     #include <dt-bindings/clock/mt8195-clk.h>
 104     #include <dt-bindings/reset/mt8195-resets.h>
 105     #include <dt-bindings/thermal/mediatek,lvts-thermal.h>
 106
 107     soc {
 108       #address-cells = <2>;
 109       #size-cells = <2>;
 110
 111       lvts_mcu: thermal-sensor@11278000 {
 112         compatible = "mediatek,mt8195-lvts-mcu";
 113         reg = <0 0x11278000 0 0x1000>;
 114         interrupts = <GIC_SPI 170 IRQ_TYPE_LEVEL_HIGH 0>;
 115         clocks = <&infracfg_ao CLK_INFRA_AO_THERM>;
 116         resets = <&infracfg_ao MT8195_INFRA_RST4_THERM_CTRL_MCU_SWRST>;
 117         nvmem-cells = <&lvts_efuse_data1 &lvts_efuse_data2>;
 118         nvmem-cell-names = "lvts-calib-data-1", "lvts-calib-data-2";
 119         #thermal-sensor-cells = <1>;
 120       };
 121     };
 122
 123     thermal_zones: thermal-zones {
 124       cpu0-thermal {
 125         polling-delay = <1000>;
 126         polling-delay-passive = <250>;
 127         thermal-sensors = <&lvts_mcu MT8195_MCU_LITTLE_CPU0>;
 128
 129         trips {
 130           cpu0_alert: trip-alert {
 131             temperature = <85000>;
 132             hysteresis = <2000>;
 133             type = "passive";
 134           };
 135
 136           cpu0_crit: trip-crit {
 137             temperature = <100000>;
 138             hysteresis = <2000>;
 139             type = "critical";
 140           };
 141         };
 142       };
 143     };