linux-kernel - [PATCH v10 2/6] dt-bindings/thermal/mediatek: Add dt-binding document for LVTS thermal controllers

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Message-Id: <20230112152855.216072-3-bchihi@baylibre.com>
Date:   Thu, 12 Jan 2023 16:28:51 +0100
From:   bchihi@...libre.com
To:     daniel.lezcano@...aro.org, rafael@...nel.org, amitk@...nel.org,
        rui.zhang@...el.com
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        khilman@...libre.com, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, james.lo@...iatek.com,
        rex-bc.chen@...iatek.com
Subject: [PATCH v10 2/6] dt-bindings/thermal/mediatek: Add dt-binding document for LVTS thermal controllers

From: Balsam CHIHI <bchihi@...libre.com>

Add dt-binding document for mt8192 and mt8195 LVTS thermal controllers.

Signed-off-by: Balsam CHIHI <bchihi@...libre.com>
---
 .../thermal/mediatek,lvts-thermal.yaml        | 140 ++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/thermal/mediatek,lvts-thermal.yaml

diff --git a/Documentation/devicetree/bindings/thermal/mediatek,lvts-thermal.yaml b/Documentation/devicetree/bindings/thermal/mediatek,lvts-thermal.yaml
new file mode 100644
index 000000000000..43b8777fc1b2
--- /dev/null
+++ b/Documentation/devicetree/bindings/thermal/mediatek,lvts-thermal.yaml
@@ -0,0 +1,140 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/thermal/mediatek,lvts-thermal.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek SoC Low Voltage Thermal Sensor (LVTS)
+
+maintainers:
+  - Balsam CHIHI <bchihi@...libre.com>
+
+description: |
+  LVTS is a thermal management architecture composed of three subsystems,
+  a Sensing device - Thermal Sensing Micro Circuit Unit (TSMCU),
+  a Converter - Low Voltage Thermal Sensor converter (LVTS), and
+  a Digital controller (LVTS_CTRL).
+
+properties:
+  compatible:
+    enum:
+      - mediatek,mt8192-lvts-mcu
+      - mediatek,mt8192-lvts-ap
+      - mediatek,mt8195-lvts-mcu
+      - mediatek,mt8195-lvts-ap
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+    description: LVTS reset for clearing temporary data on AP/MCU.
+
+  nvmem-cells:
+    minItems: 1
+    items:
+      - description: Calibration eFuse data 1 for LVTS
+      - description: Calibration eFuse data 2 for LVTS
+
+  nvmem-cell-names:
+    minItems: 1
+    items:
+      - const: lvts-calib-data-1
+      - const: lvts-calib-data-2
+
+  "#thermal-sensor-cells":
+    const: 1
+
+allOf:
+  - $ref: thermal-sensor.yaml#
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - mediatek,mt8192-lvts-mcu
+              - mediatek,mt8192-lvts-ap
+    then:
+      properties:
+        nvmem-cells:
+          maxItems: 1
+
+        nvmem-cell-names:
+          maxItems: 1
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - mediatek,mt8195-lvts-mcu
+              - mediatek,mt8195-lvts-ap
+    then:
+      properties:
+        nvmem-cells:
+          maxItems: 2
+
+        nvmem-cell-names:
+          maxItems: 2
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - resets
+  - nvmem-cells
+  - nvmem-cell-names
+  - "#thermal-sensor-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/mt8195-clk.h>
+    #include <dt-bindings/reset/mt8195-resets.h>
+    #include <dt-bindings/thermal/mediatek-lvts.h>
+
+    soc {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      lvts_mcu: thermal-sensor@...78000 {
+        compatible = "mediatek,mt8195-lvts-mcu";
+        reg = <0 0x11278000 0 0x1000>;
+        interrupts = <GIC_SPI 170 IRQ_TYPE_LEVEL_HIGH 0>;
+        clocks = <&infracfg_ao CLK_INFRA_AO_THERM>;
+        resets = <&infracfg_ao MT8195_INFRA_RST4_THERM_CTRL_MCU_SWRST>;
+        nvmem-cells = <&lvts_efuse_data1 &lvts_efuse_data2>;
+        nvmem-cell-names = "lvts-calib-data-1", "lvts-calib-data-2";
+        #thermal-sensor-cells = <1>;
+      };
+    };
+
+    thermal_zones: thermal-zones {
+      cpu0-thermal {
+        polling-delay = <1000>;
+        polling-delay-passive = <250>;
+        thermal-sensors = <&lvts_mcu MT819x_MCU_LITTLE_CPU0>;
+        trips {
+          cpu0_alert: trip-alert {
+            temperature = <85000>;
+            hysteresis = <2000>;
+            type = "passive";
+          };
+          cpu0_crit: trip-crit {
+            temperature = <100000>;
+            hysteresis = <2000>;
+            type = "critical";
+          };
+        };
+      };
+    };
-- 
2.34.1