Add fuse API and commands

This can be useful for fuse-like hardware, OTP SoC options, etc.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>

include/fuse.h

@@ -0,0 +1,44 @@
+/*
+ * (C) Copyright 2009-2013 ADVANSEE
+ * Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
+ *
+ * Based on the mpc512x iim code:
+ * Copyright 2008 Silicon Turnkey Express, Inc.
+ * Martha Marx <mmarx@silicontkx.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _FUSE_H_
+#define _FUSE_H_
+
+/*
+ * Read/Sense/Program/Override interface:
+ *   bank:    Fuse bank
+ *   word:    Fuse word within the bank
+ *   val:     Value to read/write
+ *
+ *   Returns: 0 on success, not 0 on failure
+ */
+int fuse_read(u32 bank, u32 word, u32 *val);
+int fuse_sense(u32 bank, u32 word, u32 *val);
+int fuse_prog(u32 bank, u32 word, u32 val);
+int fuse_override(u32 bank, u32 word, u32 val);
+
+#endif	/* _FUSE_H_ */