[PATCH v3] dt-bindings: thermal: mediatek: Add LVTS thermal controllers

[bchihi at baylibre.com]

From: Balsam CHIHI <bchihi at baylibre.com>

Add LVTS thermal controllers dt-binding definition for mt8195.

Signed-off-by: Balsam CHIHI <bchihi at baylibre.com>
---
Changelog:
  v3:
     - Fixed subject prefix
     - Fixed licenses GPL-2.0-only OR BSD-2-Clause
       to GPL-2.0 OR MIT (to match DT)
     - Fixed matching dt-binding file names
  v2:
     - Fixed subject prefix
     - Fixed licenses GPL-2.0+ to GPL-2.0
     - Added dual licenses
---
---
 .../thermal/mediatek,lvts-thermal.yaml        | 107 ++++++++++++++++++
 .../thermal/mediatek,lvts-thermal.h           |  19 ++++
 2 files changed, 126 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/thermal/mediatek,lvts-thermal.yaml
 create mode 100644 include/dt-bindings/thermal/mediatek,lvts-thermal.h

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..5fa5c7a1a417
--- /dev/null
+++ b/Documentation/devicetree/bindings/thermal/mediatek,lvts-thermal.yaml
@@ -0,0 +1,107 @@
+# SPDX-License-Identifier: (GPL-2.0 OR MIT)
+%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 at baylibre.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,mt8195-lvts-ap
+      - mediatek,mt8195-lvts-mcu
+
+  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
+
+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-thermal.h>
+
+    soc {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      lvts_mcu: thermal-sensor at 11278000 {
+        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 MT8195_MCU_LITTLE_CPU0>;
+
+        trips {
+          cpu0_alert: trip-alert {
+            temperature = <85000>;
+            hysteresis = <2000>;
+            type = "passive";
+          };
+
+          cpu0_crit: trip-crit {
+            temperature = <100000>;
+            hysteresis = <2000>;
+            type = "critical";
+          };
+        };
+      };
+    };
diff --git a/include/dt-bindings/thermal/mediatek,lvts-thermal.h b/include/dt-bindings/thermal/mediatek,lvts-thermal.h
new file mode 100644
index 000000000000..ca1ef29a8fee
--- /dev/null
+++ b/include/dt-bindings/thermal/mediatek,lvts-thermal.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
+/*
+ * Copyright (c) 2023 MediaTek Inc.
+ * Author: Balsam CHIHI <bchihi at baylibre.com>
+ */
+
+#ifndef __MEDIATEK_LVTS_DT_H
+#define __MEDIATEK_LVTS_DT_H
+
+#define MT8195_MCU_BIG_CPU0		0
+#define MT8195_MCU_BIG_CPU1		1
+#define MT8195_MCU_BIG_CPU2		2
+#define MT8195_MCU_BIG_CPU3		3
+#define MT8195_MCU_LITTLE_CPU0	4
+#define MT8195_MCU_LITTLE_CPU1	5
+#define MT8195_MCU_LITTLE_CPU2	6
+#define MT8195_MCU_LITTLE_CPU3	7
+
+#endif /* __MEDIATEK_LVTS_DT_H */
-- 
2.34.1