From ba983f9387a703f3be8149382d4f0dcfb2009b6c Mon Sep 17 00:00:00 2001
From: Anthony Gutierrez <atgutier@umich.edu>
Date: Fri, 15 Feb 2013 18:48:59 -0500
Subject: ext lib: add libfdt to enable flattened device tree support

this patch adds libfdt, a library necessary for supporting
flattened device tree support in current and future versions of
the linux/android kernel for ARM.
---
 ext/libfdt/fdt_strerror.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 ext/libfdt/fdt_strerror.c

(limited to 'ext/libfdt/fdt_strerror.c')

diff --git a/ext/libfdt/fdt_strerror.c b/ext/libfdt/fdt_strerror.c
new file mode 100644
index 000000000..35cb4f424
--- /dev/null
+++ b/ext/libfdt/fdt_strerror.c
@@ -0,0 +1,75 @@
+/*
+ * libfdt - Flat Device Tree manipulation
+ * Copyright (C) 2006 David Gibson, IBM Corporation.
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *     1. Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *     2. Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <fdt.h>
+#include <libfdt.h>
+
+#include "libfdt_env.h"
+#include "libfdt_internal.h"
+
+struct fdt_errtabent {
+        const char *str;
+};
+
+#define FDT_ERRTABENT(val) \
+        [(val)] = { .str = #val, }
+
+static struct fdt_errtabent fdt_errtable[] = {
+        FDT_ERRTABENT(FDT_ERR_NOTFOUND),
+        FDT_ERRTABENT(FDT_ERR_EXISTS),
+        FDT_ERRTABENT(FDT_ERR_NOSPACE),
+
+        FDT_ERRTABENT(FDT_ERR_BADOFFSET),
+        FDT_ERRTABENT(FDT_ERR_BADPATH),
+        FDT_ERRTABENT(FDT_ERR_BADSTATE),
+
+        FDT_ERRTABENT(FDT_ERR_TRUNCATED),
+        FDT_ERRTABENT(FDT_ERR_BADMAGIC),
+        FDT_ERRTABENT(FDT_ERR_BADVERSION),
+        FDT_ERRTABENT(FDT_ERR_BADSTRUCTURE),
+        FDT_ERRTABENT(FDT_ERR_BADLAYOUT),
+};
+#define FDT_ERRTABSIZE	(sizeof(fdt_errtable) / sizeof(fdt_errtable[0]))
+
+const char *fdt_strerror(int errval)
+{
+        if (errval > 0)
+                return "<valid offset/length>";
+        else if (errval == 0)
+                return "<no error>";
+        else if (errval > -FDT_ERRTABSIZE) {
+                const char *s = fdt_errtable[-errval].str;
+
+                if (s)
+                        return s;
+        }
+
+        return "<unknown error>";
+}
-- 
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