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

bchihi
2023-01-31T14:04:58Z

From: Balsam CHIHI <bchihi@baylibre.com>

Add LVTS thermal controllers dt-binding definition for mt8195.

Signed-off-by: Balsam CHIHI <bchihi@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@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@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@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