hoc-overlay: add fan control feature to sysmodule

Source/sys-clk/sysmodule/src/fancontrol.h

@@ -0,0 +1,41 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <math.h>
+#include <sys/stat.h>
+#include <sys/syslimits.h>
+#include <switch.h>
+
+#define LOG_DIR "./config/hoc-clk/"
+#define LOG_FILE "./config/hoc-clk/fan_log.txt"
+#define CONFIG_DIR "./config/hoc-clk/"
+#define CONFIG_FILE "./config/hoc-clk/config.dat"
+#define TABLE_SIZE sizeof(TemperaturePoint) * 10
+
+
+typedef struct
+{
+    int     temperature_c;
+    float   fanLevel_f;
+} TemperaturePoint;
+
+void WriteConfigFile(TemperaturePoint *table);
+void ReadConfigFile(TemperaturePoint **table_out);
+
+void InitFanController(TemperaturePoint *table);
+void FanControllerThreadFunction(void*);
+void StartFanControllerThread();
+void CloseFanControllerThread();
+void WaitFanController();
+void WriteLog(char *buffer);
+
+#ifdef __cplusplus
+}
+#endif