mirror of
https://github.com/AsahiLinux/u-boot
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0ba41ce1b7
According to the device tree specification, the default value for
was not present.
This patch also makes fdt_address_cells() and fdt_size_cells() conform
to the behaviour documented in libfdt.h. The defaults are only returned
if fdt_getprop() returns -FDT_ERR_NOTFOUND, otherwise the actual error
is returned.
This is based on upstream commit:
aa7254d ("libfdt: return correct value if #size-cells property is not present")
but misses the test case part, as we don't implement them in U-Boot.
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
97 lines
3.2 KiB
C
97 lines
3.2 KiB
C
/*
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* libfdt - Flat Device Tree manipulation
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* Copyright (C) 2014 David Gibson <david@gibson.dropbear.id.au>
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* Copyright (C) 2018 embedded brains GmbH
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*
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* libfdt is dual licensed: you can use it either under the terms of
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* the GPL, or the BSD license, at your option.
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*
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* a) This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*
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* Alternatively,
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*
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* b) Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "libfdt_env.h"
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#include <fdt.h>
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#include <libfdt.h>
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#include "libfdt_internal.h"
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static int fdt_cells(const void *fdt, int nodeoffset, const char *name)
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{
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const fdt32_t *c;
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int val;
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int len;
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c = fdt_getprop(fdt, nodeoffset, name, &len);
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if (!c)
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return len;
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if (len != sizeof(*c))
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return -FDT_ERR_BADNCELLS;
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val = fdt32_to_cpu(*c);
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if ((val <= 0) || (val > FDT_MAX_NCELLS))
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return -FDT_ERR_BADNCELLS;
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return val;
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}
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int fdt_address_cells(const void *fdt, int nodeoffset)
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{
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int val;
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val = fdt_cells(fdt, nodeoffset, "#address-cells");
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if (val == -FDT_ERR_NOTFOUND)
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return 2;
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return val;
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}
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int fdt_size_cells(const void *fdt, int nodeoffset)
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{
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int val;
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val = fdt_cells(fdt, nodeoffset, "#size-cells");
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if (val == -FDT_ERR_NOTFOUND)
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return 1;
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return val;
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}
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