diff --git a/meson.build b/meson.build
new file mode 100644
index 0000000..3f535cd
--- /dev/null
+++ b/meson.build
@@ -0,0 +1,3 @@
+project('tuxclocker')
+
+subdir('src')
diff --git a/src/include/tc_assignable.h b/src/include/tc_assignable.h
new file mode 100644
index 0000000..1f70fbe
--- /dev/null
+++ b/src/include/tc_assignable.h
@@ -0,0 +1,56 @@
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+
+/* Defines the interface for modifying writable properties in controlled hardware.
+   It is a tree structure provided by a module. */
+
+enum tc_assignable_value_category {TC_ASSIGNABLE_RANGE, TC_ASSIGNABLE_ENUM};
+
+// Is the range double or integer
+enum tc_assignable_range_data_type {TC_ASSIGNABLE_RANGE_INT, TC_ASSIGNABLE_RANGE_DOUBLE};
+
+typedef struct tc_assignable_range_double_t{
+  double min, max;
+} tc_assignable_range_double_t;
+
+typedef struct tc_assignable_range_int_t{
+  int64_t min, max;
+} tc_assignable_range_int_t;
+
+typedef struct {
+  enum tc_assignable_range_data_type range_data_type;
+  union {
+    tc_assignable_range_double_t double_range;
+    tc_assignable_range_int_t int_range;
+  };
+} tc_assignable_range_t;
+
+typedef struct {
+  uint16_t property_count;
+  char **properties;
+} tc_assignable_enum_t;
+
+
+
+typedef struct tc_assignable_node_t {
+  // Assignable name eg. fan speed
+  char *name;
+  // Unit for assignable
+  char *unit;
+
+  bool assignable;
+  // Callback for assignment
+  int8_t (*assign_callback)();
+
+  // Possible values for tunables are either values from a range or enumerations
+  enum tc_assignable_value_category value_category;
+  union {
+    tc_assignable_enum_t enum_info;
+    tc_assignable_range_t range_info;
+  };
+
+  uint16_t children_count;
+  struct tc_assignable_node_t **children_nodes;
+} tc_assignable_node_t;
diff --git a/src/include/tc_module.h b/src/include/tc_module.h
new file mode 100644
index 0000000..36ea689
--- /dev/null
+++ b/src/include/tc_module.h
@@ -0,0 +1,7 @@
+#pragma once
+
+#include <stdint.h>
+
+typedef struct tc_module_t {
+
+} tc_module_t;
diff --git a/src/meson.build b/src/meson.build
new file mode 100644
index 0000000..10e3011
--- /dev/null
+++ b/src/meson.build
@@ -0,0 +1 @@
+subdir('modules')
diff --git a/src/modules/assignable/meson.build b/src/modules/assignable/meson.build
new file mode 100644
index 0000000..1855fb8
--- /dev/null
+++ b/src/modules/assignable/meson.build
@@ -0,0 +1 @@
+shared_library('libnvidia', 'nvidia.c')
diff --git a/src/modules/assignable/nvidia.c b/src/modules/assignable/nvidia.c
new file mode 100644
index 0000000..4e29248
--- /dev/null
+++ b/src/modules/assignable/nvidia.c
@@ -0,0 +1,5 @@
+#include "/opt/cuda/include/nvml.h"
+
+#define MAX_GPUS 32
+
+static nvmlDevice_t nvml_handles[MAX_GPUS];
diff --git a/src/modules/meson.build b/src/modules/meson.build
new file mode 100644
index 0000000..29f5036
--- /dev/null
+++ b/src/modules/meson.build
@@ -0,0 +1 @@
+subdir('assignable')