summaryrefslogtreecommitdiff
path: root/scripts/dtc/libfdt/fdt_ro.c
diff options
context:
space:
mode:
Diffstat (limited to 'scripts/dtc/libfdt/fdt_ro.c')
-rw-r--r--scripts/dtc/libfdt/fdt_ro.c97
1 files changed, 36 insertions, 61 deletions
diff --git a/scripts/dtc/libfdt/fdt_ro.c b/scripts/dtc/libfdt/fdt_ro.c
index eafc14282892..6fd9ec170dbe 100644
--- a/scripts/dtc/libfdt/fdt_ro.c
+++ b/scripts/dtc/libfdt/fdt_ro.c
@@ -1,52 +1,7 @@
+// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
/*
* libfdt - Flat Device Tree manipulation
* Copyright (C) 2006 David Gibson, IBM Corporation.
- *
- * libfdt is dual licensed: you can use it either under the terms of
- * the GPL, or the BSD license, at your option.
- *
- * a) This library 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 library 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 library; if not, write to the Free
- * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
- * MA 02110-1301 USA
- *
- * Alternatively,
- *
- * b) 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 "libfdt_env.h"
@@ -144,29 +99,49 @@ static int fdt_string_eq_(const void *fdt, int stroffset,
return p && (slen == len) && (memcmp(p, s, len) == 0);
}
-uint32_t fdt_get_max_phandle(const void *fdt)
+int fdt_find_max_phandle(const void *fdt, uint32_t *phandle)
{
- uint32_t max_phandle = 0;
- int offset;
+ uint32_t max = 0;
+ int offset = -1;
- for (offset = fdt_next_node(fdt, -1, NULL);;
- offset = fdt_next_node(fdt, offset, NULL)) {
- uint32_t phandle;
+ while (true) {
+ uint32_t value;
- if (offset == -FDT_ERR_NOTFOUND)
- return max_phandle;
+ offset = fdt_next_node(fdt, offset, NULL);
+ if (offset < 0) {
+ if (offset == -FDT_ERR_NOTFOUND)
+ break;
- if (offset < 0)
- return (uint32_t)-1;
+ return offset;
+ }
- phandle = fdt_get_phandle(fdt, offset);
- if (phandle == (uint32_t)-1)
- continue;
+ value = fdt_get_phandle(fdt, offset);
- if (phandle > max_phandle)
- max_phandle = phandle;
+ if (value > max)
+ max = value;
}
+ if (phandle)
+ *phandle = max;
+
+ return 0;
+}
+
+int fdt_generate_phandle(const void *fdt, uint32_t *phandle)
+{
+ uint32_t max;
+ int err;
+
+ err = fdt_find_max_phandle(fdt, &max);
+ if (err < 0)
+ return err;
+
+ if (max == FDT_MAX_PHANDLE)
+ return -FDT_ERR_NOPHANDLES;
+
+ if (phandle)
+ *phandle = max + 1;
+
return 0;
}