rewrite everything

Source/sys-clk/overlay/src/rgltr_services.h

@@ -0,0 +1,29 @@
+// rgltr_services.h
+// ========
+// Minimal header declarations for rgltr‐related functionality.
+// Any file that wants to call rgltrOpenSession(), rgltrGetVoltage(), etc. should
+// simply do `#include "infonx.h"` (NOT infonx.cpp).
+
+#pragma once
+
+#include <switch.h>  // for Service, Result, hosversionBefore(), smGetService(), serviceClose(), etc.
+#include "rgltr.h"   // for RgltrSession, PowerDomainId, etc.
+
+// Global service handle for "rgltr". Defined in infonx.cpp.
+extern Service g_rgltrSrv;
+
+// Open/close the "rgltr" service. You must call rgltrInitialize() (once) before using
+// rgltrOpenSession() & friends.  Call rgltrExit() when your app is shutting down.
+Result rgltrInitialize(void);
+void   rgltrExit(void);
+
+// Open a regulator session for the given PowerDomainId (e.g. CPU, GPU, DRAM).
+// On success, (*session_out).s will contain a valid Service handle.
+Result rgltrOpenSession(RgltrSession* session_out, PowerDomainId module_id);
+
+// Query the current voltage (in microvolts, µV) from a previously opened session.
+// Writes the result into *out_volt.
+Result rgltrGetVoltage(RgltrSession* session, u32* out_volt);
+
+// Close a previously opened regulator session.
+void   rgltrCloseSession(RgltrSession* session);