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@@ -0,0 +1,1876 @@
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+#ifndef _LIBFDT_H
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+#define _LIBFDT_H
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+/*
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+ * libfdt - Flat Device Tree manipulation
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+ * Copyright (C) 2006 David Gibson, IBM Corporation.
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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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+
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+#include "libfdt_env.h"
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+#include "fdt.h"
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+
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+#define FDT_FIRST_SUPPORTED_VERSION 0x10
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+#define FDT_LAST_SUPPORTED_VERSION 0x11
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+
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+/* Error codes: informative error codes */
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+#define FDT_ERR_NOTFOUND 1
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+ /* FDT_ERR_NOTFOUND: The requested node or property does not exist */
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+#define FDT_ERR_EXISTS 2
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+ /* FDT_ERR_EXISTS: Attempted to create a node or property which
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+ * already exists */
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+#define FDT_ERR_NOSPACE 3
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+ /* FDT_ERR_NOSPACE: Operation needed to expand the device
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+ * tree, but its buffer did not have sufficient space to
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+ * contain the expanded tree. Use fdt_open_into() to move the
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+ * device tree to a buffer with more space. */
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+
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+/* Error codes: codes for bad parameters */
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+#define FDT_ERR_BADOFFSET 4
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+ /* FDT_ERR_BADOFFSET: Function was passed a structure block
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+ * offset which is out-of-bounds, or which points to an
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+ * unsuitable part of the structure for the operation. */
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+#define FDT_ERR_BADPATH 5
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+ /* FDT_ERR_BADPATH: Function was passed a badly formatted path
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+ * (e.g. missing a leading / for a function which requires an
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+ * absolute path) */
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+#define FDT_ERR_BADPHANDLE 6
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+ /* FDT_ERR_BADPHANDLE: Function was passed an invalid phandle.
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+ * This can be caused either by an invalid phandle property
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+ * length, or the phandle value was either 0 or -1, which are
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+ * not permitted. */
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+#define FDT_ERR_BADSTATE 7
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+ /* FDT_ERR_BADSTATE: Function was passed an incomplete device
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+ * tree created by the sequential-write functions, which is
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+ * not sufficiently complete for the requested operation. */
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+
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+/* Error codes: codes for bad device tree blobs */
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+#define FDT_ERR_TRUNCATED 8
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+ /* FDT_ERR_TRUNCATED: Structure block of the given device tree
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+ * ends without an FDT_END tag. */
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+#define FDT_ERR_BADMAGIC 9
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+ /* FDT_ERR_BADMAGIC: Given "device tree" appears not to be a
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+ * device tree at all - it is missing the flattened device
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+ * tree magic number. */
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+#define FDT_ERR_BADVERSION 10
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+ /* FDT_ERR_BADVERSION: Given device tree has a version which
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+ * can't be handled by the requested operation. For
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+ * read-write functions, this may mean that fdt_open_into() is
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+ * required to convert the tree to the expected version. */
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+#define FDT_ERR_BADSTRUCTURE 11
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+ /* FDT_ERR_BADSTRUCTURE: Given device tree has a corrupt
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+ * structure block or other serious error (e.g. misnested
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+ * nodes, or subnodes preceding properties). */
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+#define FDT_ERR_BADLAYOUT 12
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+ /* FDT_ERR_BADLAYOUT: For read-write functions, the given
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+ * device tree has it's sub-blocks in an order that the
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+ * function can't handle (memory reserve map, then structure,
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+ * then strings). Use fdt_open_into() to reorganize the tree
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+ * into a form suitable for the read-write operations. */
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+
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+/* "Can't happen" error indicating a bug in libfdt */
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+#define FDT_ERR_INTERNAL 13
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+ /* FDT_ERR_INTERNAL: libfdt has failed an internal assertion.
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+ * Should never be returned, if it is, it indicates a bug in
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+ * libfdt itself. */
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+
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+/* Errors in device tree content */
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+#define FDT_ERR_BADNCELLS 14
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+ /* FDT_ERR_BADNCELLS: Device tree has a #address-cells, #size-cells
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+ * or similar property with a bad format or value */
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+
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+#define FDT_ERR_BADVALUE 15
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+ /* FDT_ERR_BADVALUE: Device tree has a property with an unexpected
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+ * value. For example: a property expected to contain a string list
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+ * is not NUL-terminated within the length of its value. */
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+
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+#define FDT_ERR_BADOVERLAY 16
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+ /* FDT_ERR_BADOVERLAY: The device tree overlay, while
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+ * correctly structured, cannot be applied due to some
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+ * unexpected or missing value, property or node. */
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+
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+#define FDT_ERR_NOPHANDLES 17
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+ /* FDT_ERR_NOPHANDLES: The device tree doesn't have any
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+ * phandle available anymore without causing an overflow */
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+
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+#define FDT_ERR_MAX 17
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+
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+/**********************************************************************/
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+/* Low-level functions (you probably don't need these) */
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+/**********************************************************************/
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+
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+#ifndef SWIG /* This function is not useful in Python */
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+const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int checklen);
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+#endif
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+static inline void *fdt_offset_ptr_w(void *fdt, int offset, int checklen)
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+{
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+ return (void *)(uintptr_t)fdt_offset_ptr(fdt, offset, checklen);
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+}
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+
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+uint32_t fdt_next_tag(const void *fdt, int offset, int *nextoffset);
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+
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+static inline void fdt32_st(void *property, uint32_t value)
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+{
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+ uint8_t *bp = (uint8_t *)property;
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+
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+ bp[0] = value >> 24;
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+ bp[1] = (value >> 16) & 0xff;
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+ bp[2] = (value >> 8) & 0xff;
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+ bp[3] = value & 0xff;
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+}
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+
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+static inline void fdt64_st(void *property, uint64_t value)
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+{
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+ uint8_t *bp = (uint8_t *)property;
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+
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+ bp[0] = value >> 56;
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+ bp[1] = (value >> 48) & 0xff;
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+ bp[2] = (value >> 40) & 0xff;
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+ bp[3] = (value >> 32) & 0xff;
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+ bp[4] = (value >> 24) & 0xff;
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+ bp[5] = (value >> 16) & 0xff;
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+ bp[6] = (value >> 8) & 0xff;
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+ bp[7] = value & 0xff;
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+}
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+
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+/**********************************************************************/
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+/* Traversal functions */
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+/**********************************************************************/
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+
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+int fdt_next_node(const void *fdt, int offset, int *depth);
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+
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+/**
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+ * fdt_first_subnode() - get offset of first direct subnode
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+ *
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+ * @fdt: FDT blob
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+ * @offset: Offset of node to check
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+ * @return offset of first subnode, or -FDT_ERR_NOTFOUND if there is none
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+ */
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+int fdt_first_subnode(const void *fdt, int offset);
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+
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+/**
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+ * fdt_next_subnode() - get offset of next direct subnode
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+ *
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+ * After first calling fdt_first_subnode(), call this function repeatedly to
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+ * get direct subnodes of a parent node.
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+ *
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+ * @fdt: FDT blob
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+ * @offset: Offset of previous subnode
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+ * @return offset of next subnode, or -FDT_ERR_NOTFOUND if there are no more
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+ * subnodes
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+ */
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+int fdt_next_subnode(const void *fdt, int offset);
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+
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+/**
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+ * fdt_for_each_subnode - iterate over all subnodes of a parent
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+ *
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+ * @node: child node (int, lvalue)
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+ * @fdt: FDT blob (const void *)
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+ * @parent: parent node (int)
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+ *
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+ * This is actually a wrapper around a for loop and would be used like so:
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+ *
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+ * fdt_for_each_subnode(node, fdt, parent) {
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+ * Use node
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+ * ...
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+ * }
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+ *
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+ * if ((node < 0) && (node != -FDT_ERR_NOT_FOUND)) {
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+ * Error handling
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+ * }
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+ *
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+ * Note that this is implemented as a macro and @node is used as
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+ * iterator in the loop. The parent variable be constant or even a
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+ * literal.
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+ *
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+ */
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+#define fdt_for_each_subnode(node, fdt, parent) \
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+ for (node = fdt_first_subnode(fdt, parent); \
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+ node >= 0; \
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+ node = fdt_next_subnode(fdt, node))
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+
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+/**********************************************************************/
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+/* General functions */
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+/**********************************************************************/
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+#define fdt_get_header(fdt, field) \
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+ (fdt32_to_cpu(((const struct fdt_header *)(fdt))->field))
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+#define fdt_magic(fdt) (fdt_get_header(fdt, magic))
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+#define fdt_totalsize(fdt) (fdt_get_header(fdt, totalsize))
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+#define fdt_off_dt_struct(fdt) (fdt_get_header(fdt, off_dt_struct))
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+#define fdt_off_dt_strings(fdt) (fdt_get_header(fdt, off_dt_strings))
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+#define fdt_off_mem_rsvmap(fdt) (fdt_get_header(fdt, off_mem_rsvmap))
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+#define fdt_version(fdt) (fdt_get_header(fdt, version))
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+#define fdt_last_comp_version(fdt) (fdt_get_header(fdt, last_comp_version))
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+#define fdt_boot_cpuid_phys(fdt) (fdt_get_header(fdt, boot_cpuid_phys))
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+#define fdt_size_dt_strings(fdt) (fdt_get_header(fdt, size_dt_strings))
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+#define fdt_size_dt_struct(fdt) (fdt_get_header(fdt, size_dt_struct))
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+
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+#define __fdt_set_hdr(name) \
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+ static inline void fdt_set_##name(void *fdt, uint32_t val) \
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+ { \
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+ struct fdt_header *fdth = (struct fdt_header *)fdt; \
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+ fdth->name = cpu_to_fdt32(val); \
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+ }
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+__fdt_set_hdr(magic);
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+__fdt_set_hdr(totalsize);
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+__fdt_set_hdr(off_dt_struct);
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+__fdt_set_hdr(off_dt_strings);
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+__fdt_set_hdr(off_mem_rsvmap);
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+__fdt_set_hdr(version);
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+__fdt_set_hdr(last_comp_version);
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+__fdt_set_hdr(boot_cpuid_phys);
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+__fdt_set_hdr(size_dt_strings);
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+__fdt_set_hdr(size_dt_struct);
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+#undef __fdt_set_hdr
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+
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+/**
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+ * fdt_check_header - sanity check a device tree or possible device tree
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+ * @fdt: pointer to data which might be a flattened device tree
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+ *
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+ * fdt_check_header() checks that the given buffer contains what
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+ * appears to be a flattened device tree with sane information in its
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+ * header.
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+ *
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+ * returns:
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+ * 0, if the buffer appears to contain a valid device tree
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+ * -FDT_ERR_BADMAGIC,
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+ * -FDT_ERR_BADVERSION,
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+ * -FDT_ERR_BADSTATE, standard meanings, as above
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+ */
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+int fdt_check_header(const void *fdt);
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+
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+/**
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+ * fdt_move - move a device tree around in memory
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+ * @fdt: pointer to the device tree to move
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+ * @buf: pointer to memory where the device is to be moved
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+ * @bufsize: size of the memory space at buf
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+ *
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+ * fdt_move() relocates, if possible, the device tree blob located at
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+ * fdt to the buffer at buf of size bufsize. The buffer may overlap
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+ * with the existing device tree blob at fdt. Therefore,
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+ * fdt_move(fdt, fdt, fdt_totalsize(fdt))
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+ * should always succeed.
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+ *
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+ * returns:
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+ * 0, on success
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+ * -FDT_ERR_NOSPACE, bufsize is insufficient to contain the device tree
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+ * -FDT_ERR_BADMAGIC,
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+ * -FDT_ERR_BADVERSION,
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+ * -FDT_ERR_BADSTATE, standard meanings
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+ */
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+int fdt_move(const void *fdt, void *buf, int bufsize);
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+
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+/**********************************************************************/
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+/* Read-only functions */
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+/**********************************************************************/
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+
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+/**
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+ * fdt_string - retrieve a string from the strings block of a device tree
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+ * @fdt: pointer to the device tree blob
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+ * @stroffset: offset of the string within the strings block (native endian)
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+ *
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+ * fdt_string() retrieves a pointer to a single string from the
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+ * strings block of the device tree blob at fdt.
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+ *
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+ * returns:
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+ * a pointer to the string, on success
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+ * NULL, if stroffset is out of bounds
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+ */
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+const char *fdt_string(const void *fdt, int stroffset);
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+
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+/**
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+ * fdt_get_max_phandle - retrieves the highest phandle in a tree
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+ * @fdt: pointer to the device tree blob
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+ *
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+ * fdt_get_max_phandle retrieves the highest phandle in the given
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+ * device tree. This will ignore badly formatted phandles, or phandles
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+ * with a value of 0 or -1.
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+ *
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+ * returns:
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+ * the highest phandle on success
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+ * 0, if no phandle was found in the device tree
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+ * -1, if an error occurred
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+ */
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+uint32_t fdt_get_max_phandle(const void *fdt);
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+
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+/**
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+ * fdt_num_mem_rsv - retrieve the number of memory reserve map entries
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+ * @fdt: pointer to the device tree blob
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+ *
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+ * Returns the number of entries in the device tree blob's memory
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+ * reservation map. This does not include the terminating 0,0 entry
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+ * or any other (0,0) entries reserved for expansion.
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+ *
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+ * returns:
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+ * the number of entries
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+ */
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+int fdt_num_mem_rsv(const void *fdt);
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+
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+/**
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+ * fdt_get_mem_rsv - retrieve one memory reserve map entry
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+ * @fdt: pointer to the device tree blob
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+ * @address, @size: pointers to 64-bit variables
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+ *
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+ * On success, *address and *size will contain the address and size of
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+ * the n-th reserve map entry from the device tree blob, in
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+ * native-endian format.
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+ *
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+ * returns:
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+ * 0, on success
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+ * -FDT_ERR_BADMAGIC,
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+ * -FDT_ERR_BADVERSION,
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+ * -FDT_ERR_BADSTATE, standard meanings
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+ */
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+int fdt_get_mem_rsv(const void *fdt, int n, uint64_t *address, uint64_t *size);
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+
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+/**
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+ * fdt_subnode_offset_namelen - find a subnode based on substring
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @parentoffset: structure block offset of a node
|
|
|
+ * @name: name of the subnode to locate
|
|
|
+ * @namelen: number of characters of name to consider
|
|
|
+ *
|
|
|
+ * Identical to fdt_subnode_offset(), but only examine the first
|
|
|
+ * namelen characters of name for matching the subnode name. This is
|
|
|
+ * useful for finding subnodes based on a portion of a larger string,
|
|
|
+ * such as a full path.
|
|
|
+ */
|
|
|
+#ifndef SWIG /* Not available in Python */
|
|
|
+int fdt_subnode_offset_namelen(const void *fdt, int parentoffset,
|
|
|
+ const char *name, int namelen);
|
|
|
+#endif
|
|
|
+/**
|
|
|
+ * fdt_subnode_offset - find a subnode of a given node
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @parentoffset: structure block offset of a node
|
|
|
+ * @name: name of the subnode to locate
|
|
|
+ *
|
|
|
+ * fdt_subnode_offset() finds a subnode of the node at structure block
|
|
|
+ * offset parentoffset with the given name. name may include a unit
|
|
|
+ * address, in which case fdt_subnode_offset() will find the subnode
|
|
|
+ * with that unit address, or the unit address may be omitted, in
|
|
|
+ * which case fdt_subnode_offset() will find an arbitrary subnode
|
|
|
+ * whose name excluding unit address matches the given name.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * structure block offset of the requested subnode (>=0), on success
|
|
|
+ * -FDT_ERR_NOTFOUND, if the requested subnode does not exist
|
|
|
+ * -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE
|
|
|
+ * tag
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings.
|
|
|
+ */
|
|
|
+int fdt_subnode_offset(const void *fdt, int parentoffset, const char *name);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_path_offset_namelen - find a tree node by its full path
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @path: full path of the node to locate
|
|
|
+ * @namelen: number of characters of path to consider
|
|
|
+ *
|
|
|
+ * Identical to fdt_path_offset(), but only consider the first namelen
|
|
|
+ * characters of path as the path name.
|
|
|
+ */
|
|
|
+#ifndef SWIG /* Not available in Python */
|
|
|
+int fdt_path_offset_namelen(const void *fdt, const char *path, int namelen);
|
|
|
+#endif
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_path_offset - find a tree node by its full path
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @path: full path of the node to locate
|
|
|
+ *
|
|
|
+ * fdt_path_offset() finds a node of a given path in the device tree.
|
|
|
+ * Each path component may omit the unit address portion, but the
|
|
|
+ * results of this are undefined if any such path component is
|
|
|
+ * ambiguous (that is if there are multiple nodes at the relevant
|
|
|
+ * level matching the given component, differentiated only by unit
|
|
|
+ * address).
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * structure block offset of the node with the requested path (>=0), on
|
|
|
+ * success
|
|
|
+ * -FDT_ERR_BADPATH, given path does not begin with '/' or is invalid
|
|
|
+ * -FDT_ERR_NOTFOUND, if the requested node does not exist
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings.
|
|
|
+ */
|
|
|
+int fdt_path_offset(const void *fdt, const char *path);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_get_name - retrieve the name of a given node
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: structure block offset of the starting node
|
|
|
+ * @lenp: pointer to an integer variable (will be overwritten) or NULL
|
|
|
+ *
|
|
|
+ * fdt_get_name() retrieves the name (including unit address) of the
|
|
|
+ * device tree node at structure block offset nodeoffset. If lenp is
|
|
|
+ * non-NULL, the length of this name is also returned, in the integer
|
|
|
+ * pointed to by lenp.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * pointer to the node's name, on success
|
|
|
+ * If lenp is non-NULL, *lenp contains the length of that name
|
|
|
+ * (>=0)
|
|
|
+ * NULL, on error
|
|
|
+ * if lenp is non-NULL *lenp contains an error code (<0):
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE
|
|
|
+ * tag
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE, standard meanings
|
|
|
+ */
|
|
|
+const char *fdt_get_name(const void *fdt, int nodeoffset, int *lenp);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_first_property_offset - find the offset of a node's first property
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: structure block offset of a node
|
|
|
+ *
|
|
|
+ * fdt_first_property_offset() finds the first property of the node at
|
|
|
+ * the given structure block offset.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * structure block offset of the property (>=0), on success
|
|
|
+ * -FDT_ERR_NOTFOUND, if the requested node has no properties
|
|
|
+ * -FDT_ERR_BADOFFSET, if nodeoffset did not point to an FDT_BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings.
|
|
|
+ */
|
|
|
+int fdt_first_property_offset(const void *fdt, int nodeoffset);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_next_property_offset - step through a node's properties
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @offset: structure block offset of a property
|
|
|
+ *
|
|
|
+ * fdt_next_property_offset() finds the property immediately after the
|
|
|
+ * one at the given structure block offset. This will be a property
|
|
|
+ * of the same node as the given property.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * structure block offset of the next property (>=0), on success
|
|
|
+ * -FDT_ERR_NOTFOUND, if the given property is the last in its node
|
|
|
+ * -FDT_ERR_BADOFFSET, if nodeoffset did not point to an FDT_PROP tag
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings.
|
|
|
+ */
|
|
|
+int fdt_next_property_offset(const void *fdt, int offset);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_for_each_property_offset - iterate over all properties of a node
|
|
|
+ *
|
|
|
+ * @property_offset: property offset (int, lvalue)
|
|
|
+ * @fdt: FDT blob (const void *)
|
|
|
+ * @node: node offset (int)
|
|
|
+ *
|
|
|
+ * This is actually a wrapper around a for loop and would be used like so:
|
|
|
+ *
|
|
|
+ * fdt_for_each_property_offset(property, fdt, node) {
|
|
|
+ * Use property
|
|
|
+ * ...
|
|
|
+ * }
|
|
|
+ *
|
|
|
+ * if ((property < 0) && (property != -FDT_ERR_NOT_FOUND)) {
|
|
|
+ * Error handling
|
|
|
+ * }
|
|
|
+ *
|
|
|
+ * Note that this is implemented as a macro and property is used as
|
|
|
+ * iterator in the loop. The node variable can be constant or even a
|
|
|
+ * literal.
|
|
|
+ */
|
|
|
+#define fdt_for_each_property_offset(property, fdt, node) \
|
|
|
+ for (property = fdt_first_property_offset(fdt, node); \
|
|
|
+ property >= 0; \
|
|
|
+ property = fdt_next_property_offset(fdt, property))
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_get_property_by_offset - retrieve the property at a given offset
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @offset: offset of the property to retrieve
|
|
|
+ * @lenp: pointer to an integer variable (will be overwritten) or NULL
|
|
|
+ *
|
|
|
+ * fdt_get_property_by_offset() retrieves a pointer to the
|
|
|
+ * fdt_property structure within the device tree blob at the given
|
|
|
+ * offset. If lenp is non-NULL, the length of the property value is
|
|
|
+ * also returned, in the integer pointed to by lenp.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * pointer to the structure representing the property
|
|
|
+ * if lenp is non-NULL, *lenp contains the length of the property
|
|
|
+ * value (>=0)
|
|
|
+ * NULL, on error
|
|
|
+ * if lenp is non-NULL, *lenp contains an error code (<0):
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_PROP tag
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+const struct fdt_property *fdt_get_property_by_offset(const void *fdt,
|
|
|
+ int offset,
|
|
|
+ int *lenp);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_get_property_namelen - find a property based on substring
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose property to find
|
|
|
+ * @name: name of the property to find
|
|
|
+ * @namelen: number of characters of name to consider
|
|
|
+ * @lenp: pointer to an integer variable (will be overwritten) or NULL
|
|
|
+ *
|
|
|
+ * Identical to fdt_get_property(), but only examine the first namelen
|
|
|
+ * characters of name for matching the property name.
|
|
|
+ */
|
|
|
+#ifndef SWIG /* Not available in Python */
|
|
|
+const struct fdt_property *fdt_get_property_namelen(const void *fdt,
|
|
|
+ int nodeoffset,
|
|
|
+ const char *name,
|
|
|
+ int namelen, int *lenp);
|
|
|
+#endif
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_get_property - find a given property in a given node
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose property to find
|
|
|
+ * @name: name of the property to find
|
|
|
+ * @lenp: pointer to an integer variable (will be overwritten) or NULL
|
|
|
+ *
|
|
|
+ * fdt_get_property() retrieves a pointer to the fdt_property
|
|
|
+ * structure within the device tree blob corresponding to the property
|
|
|
+ * named 'name' of the node at offset nodeoffset. If lenp is
|
|
|
+ * non-NULL, the length of the property value is also returned, in the
|
|
|
+ * integer pointed to by lenp.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * pointer to the structure representing the property
|
|
|
+ * if lenp is non-NULL, *lenp contains the length of the property
|
|
|
+ * value (>=0)
|
|
|
+ * NULL, on error
|
|
|
+ * if lenp is non-NULL, *lenp contains an error code (<0):
|
|
|
+ * -FDT_ERR_NOTFOUND, node does not have named property
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE
|
|
|
+ * tag
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+const struct fdt_property *fdt_get_property(const void *fdt, int nodeoffset,
|
|
|
+ const char *name, int *lenp);
|
|
|
+static inline struct fdt_property *fdt_get_property_w(void *fdt, int nodeoffset,
|
|
|
+ const char *name,
|
|
|
+ int *lenp)
|
|
|
+{
|
|
|
+ return (struct fdt_property *)(uintptr_t)
|
|
|
+ fdt_get_property(fdt, nodeoffset, name, lenp);
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_getprop_by_offset - retrieve the value of a property at a given offset
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @ffset: offset of the property to read
|
|
|
+ * @namep: pointer to a string variable (will be overwritten) or NULL
|
|
|
+ * @lenp: pointer to an integer variable (will be overwritten) or NULL
|
|
|
+ *
|
|
|
+ * fdt_getprop_by_offset() retrieves a pointer to the value of the
|
|
|
+ * property at structure block offset 'offset' (this will be a pointer
|
|
|
+ * to within the device blob itself, not a copy of the value). If
|
|
|
+ * lenp is non-NULL, the length of the property value is also
|
|
|
+ * returned, in the integer pointed to by lenp. If namep is non-NULL,
|
|
|
+ * the property's namne will also be returned in the char * pointed to
|
|
|
+ * by namep (this will be a pointer to within the device tree's string
|
|
|
+ * block, not a new copy of the name).
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * pointer to the property's value
|
|
|
+ * if lenp is non-NULL, *lenp contains the length of the property
|
|
|
+ * value (>=0)
|
|
|
+ * if namep is non-NULL *namep contiains a pointer to the property
|
|
|
+ * name.
|
|
|
+ * NULL, on error
|
|
|
+ * if lenp is non-NULL, *lenp contains an error code (<0):
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_PROP tag
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+#ifndef SWIG /* This function is not useful in Python */
|
|
|
+const void *fdt_getprop_by_offset(const void *fdt, int offset,
|
|
|
+ const char **namep, int *lenp);
|
|
|
+#endif
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_getprop_namelen - get property value based on substring
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose property to find
|
|
|
+ * @name: name of the property to find
|
|
|
+ * @namelen: number of characters of name to consider
|
|
|
+ * @lenp: pointer to an integer variable (will be overwritten) or NULL
|
|
|
+ *
|
|
|
+ * Identical to fdt_getprop(), but only examine the first namelen
|
|
|
+ * characters of name for matching the property name.
|
|
|
+ */
|
|
|
+#ifndef SWIG /* Not available in Python */
|
|
|
+const void *fdt_getprop_namelen(const void *fdt, int nodeoffset,
|
|
|
+ const char *name, int namelen, int *lenp);
|
|
|
+static inline void *fdt_getprop_namelen_w(void *fdt, int nodeoffset,
|
|
|
+ const char *name, int namelen,
|
|
|
+ int *lenp)
|
|
|
+{
|
|
|
+ return (void *)(uintptr_t)fdt_getprop_namelen(fdt, nodeoffset, name,
|
|
|
+ namelen, lenp);
|
|
|
+}
|
|
|
+#endif
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_getprop - retrieve the value of a given property
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose property to find
|
|
|
+ * @name: name of the property to find
|
|
|
+ * @lenp: pointer to an integer variable (will be overwritten) or NULL
|
|
|
+ *
|
|
|
+ * fdt_getprop() retrieves a pointer to the value of the property
|
|
|
+ * named 'name' of the node at offset nodeoffset (this will be a
|
|
|
+ * pointer to within the device blob itself, not a copy of the value).
|
|
|
+ * If lenp is non-NULL, the length of the property value is also
|
|
|
+ * returned, in the integer pointed to by lenp.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * pointer to the property's value
|
|
|
+ * if lenp is non-NULL, *lenp contains the length of the property
|
|
|
+ * value (>=0)
|
|
|
+ * NULL, on error
|
|
|
+ * if lenp is non-NULL, *lenp contains an error code (<0):
|
|
|
+ * -FDT_ERR_NOTFOUND, node does not have named property
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE
|
|
|
+ * tag
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+const void *fdt_getprop(const void *fdt, int nodeoffset,
|
|
|
+ const char *name, int *lenp);
|
|
|
+static inline void *fdt_getprop_w(void *fdt, int nodeoffset,
|
|
|
+ const char *name, int *lenp)
|
|
|
+{
|
|
|
+ return (void *)(uintptr_t)fdt_getprop(fdt, nodeoffset, name, lenp);
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_get_phandle - retrieve the phandle of a given node
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: structure block offset of the node
|
|
|
+ *
|
|
|
+ * fdt_get_phandle() retrieves the phandle of the device tree node at
|
|
|
+ * structure block offset nodeoffset.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * the phandle of the node at nodeoffset, on success (!= 0, != -1)
|
|
|
+ * 0, if the node has no phandle, or another error occurs
|
|
|
+ */
|
|
|
+uint32_t fdt_get_phandle(const void *fdt, int nodeoffset);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_get_alias_namelen - get alias based on substring
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @name: name of the alias th look up
|
|
|
+ * @namelen: number of characters of name to consider
|
|
|
+ *
|
|
|
+ * Identical to fdt_get_alias(), but only examine the first namelen
|
|
|
+ * characters of name for matching the alias name.
|
|
|
+ */
|
|
|
+#ifndef SWIG /* Not available in Python */
|
|
|
+const char *fdt_get_alias_namelen(const void *fdt,
|
|
|
+ const char *name, int namelen);
|
|
|
+#endif
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_get_alias - retrieve the path referenced by a given alias
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @name: name of the alias th look up
|
|
|
+ *
|
|
|
+ * fdt_get_alias() retrieves the value of a given alias. That is, the
|
|
|
+ * value of the property named 'name' in the node /aliases.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * a pointer to the expansion of the alias named 'name', if it exists
|
|
|
+ * NULL, if the given alias or the /aliases node does not exist
|
|
|
+ */
|
|
|
+const char *fdt_get_alias(const void *fdt, const char *name);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_get_path - determine the full path of a node
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose path to find
|
|
|
+ * @buf: character buffer to contain the returned path (will be overwritten)
|
|
|
+ * @buflen: size of the character buffer at buf
|
|
|
+ *
|
|
|
+ * fdt_get_path() computes the full path of the node at offset
|
|
|
+ * nodeoffset, and records that path in the buffer at buf.
|
|
|
+ *
|
|
|
+ * NOTE: This function is expensive, as it must scan the device tree
|
|
|
+ * structure from the start to nodeoffset.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, on success
|
|
|
+ * buf contains the absolute path of the node at
|
|
|
+ * nodeoffset, as a NUL-terminated string.
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_NOSPACE, the path of the given node is longer than (bufsize-1)
|
|
|
+ * characters and will not fit in the given buffer.
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE, standard meanings
|
|
|
+ */
|
|
|
+int fdt_get_path(const void *fdt, int nodeoffset, char *buf, int buflen);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_supernode_atdepth_offset - find a specific ancestor of a node
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose parent to find
|
|
|
+ * @supernodedepth: depth of the ancestor to find
|
|
|
+ * @nodedepth: pointer to an integer variable (will be overwritten) or NULL
|
|
|
+ *
|
|
|
+ * fdt_supernode_atdepth_offset() finds an ancestor of the given node
|
|
|
+ * at a specific depth from the root (where the root itself has depth
|
|
|
+ * 0, its immediate subnodes depth 1 and so forth). So
|
|
|
+ * fdt_supernode_atdepth_offset(fdt, nodeoffset, 0, NULL);
|
|
|
+ * will always return 0, the offset of the root node. If the node at
|
|
|
+ * nodeoffset has depth D, then:
|
|
|
+ * fdt_supernode_atdepth_offset(fdt, nodeoffset, D, NULL);
|
|
|
+ * will return nodeoffset itself.
|
|
|
+ *
|
|
|
+ * NOTE: This function is expensive, as it must scan the device tree
|
|
|
+ * structure from the start to nodeoffset.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * structure block offset of the node at node offset's ancestor
|
|
|
+ * of depth supernodedepth (>=0), on success
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_NOTFOUND, supernodedepth was greater than the depth of
|
|
|
+ * nodeoffset
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE, standard meanings
|
|
|
+ */
|
|
|
+int fdt_supernode_atdepth_offset(const void *fdt, int nodeoffset,
|
|
|
+ int supernodedepth, int *nodedepth);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_node_depth - find the depth of a given node
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose parent to find
|
|
|
+ *
|
|
|
+ * fdt_node_depth() finds the depth of a given node. The root node
|
|
|
+ * has depth 0, its immediate subnodes depth 1 and so forth.
|
|
|
+ *
|
|
|
+ * NOTE: This function is expensive, as it must scan the device tree
|
|
|
+ * structure from the start to nodeoffset.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * depth of the node at nodeoffset (>=0), on success
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE, standard meanings
|
|
|
+ */
|
|
|
+int fdt_node_depth(const void *fdt, int nodeoffset);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_parent_offset - find the parent of a given node
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose parent to find
|
|
|
+ *
|
|
|
+ * fdt_parent_offset() locates the parent node of a given node (that
|
|
|
+ * is, it finds the offset of the node which contains the node at
|
|
|
+ * nodeoffset as a subnode).
|
|
|
+ *
|
|
|
+ * NOTE: This function is expensive, as it must scan the device tree
|
|
|
+ * structure from the start to nodeoffset, *twice*.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * structure block offset of the parent of the node at nodeoffset
|
|
|
+ * (>=0), on success
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE, standard meanings
|
|
|
+ */
|
|
|
+int fdt_parent_offset(const void *fdt, int nodeoffset);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_node_offset_by_prop_value - find nodes with a given property value
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @startoffset: only find nodes after this offset
|
|
|
+ * @propname: property name to check
|
|
|
+ * @propval: property value to search for
|
|
|
+ * @proplen: length of the value in propval
|
|
|
+ *
|
|
|
+ * fdt_node_offset_by_prop_value() returns the offset of the first
|
|
|
+ * node after startoffset, which has a property named propname whose
|
|
|
+ * value is of length proplen and has value equal to propval; or if
|
|
|
+ * startoffset is -1, the very first such node in the tree.
|
|
|
+ *
|
|
|
+ * To iterate through all nodes matching the criterion, the following
|
|
|
+ * idiom can be used:
|
|
|
+ * offset = fdt_node_offset_by_prop_value(fdt, -1, propname,
|
|
|
+ * propval, proplen);
|
|
|
+ * while (offset != -FDT_ERR_NOTFOUND) {
|
|
|
+ * // other code here
|
|
|
+ * offset = fdt_node_offset_by_prop_value(fdt, offset, propname,
|
|
|
+ * propval, proplen);
|
|
|
+ * }
|
|
|
+ *
|
|
|
+ * Note the -1 in the first call to the function, if 0 is used here
|
|
|
+ * instead, the function will never locate the root node, even if it
|
|
|
+ * matches the criterion.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * structure block offset of the located node (>= 0, >startoffset),
|
|
|
+ * on success
|
|
|
+ * -FDT_ERR_NOTFOUND, no node matching the criterion exists in the
|
|
|
+ * tree after startoffset
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE, standard meanings
|
|
|
+ */
|
|
|
+int fdt_node_offset_by_prop_value(const void *fdt, int startoffset,
|
|
|
+ const char *propname,
|
|
|
+ const void *propval, int proplen);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_node_offset_by_phandle - find the node with a given phandle
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @phandle: phandle value
|
|
|
+ *
|
|
|
+ * fdt_node_offset_by_phandle() returns the offset of the node
|
|
|
+ * which has the given phandle value. If there is more than one node
|
|
|
+ * in the tree with the given phandle (an invalid tree), results are
|
|
|
+ * undefined.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * structure block offset of the located node (>= 0), on success
|
|
|
+ * -FDT_ERR_NOTFOUND, no node with that phandle exists
|
|
|
+ * -FDT_ERR_BADPHANDLE, given phandle value was invalid (0 or -1)
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE, standard meanings
|
|
|
+ */
|
|
|
+int fdt_node_offset_by_phandle(const void *fdt, uint32_t phandle);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_node_check_compatible: check a node's compatible property
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of a tree node
|
|
|
+ * @compatible: string to match against
|
|
|
+ *
|
|
|
+ *
|
|
|
+ * fdt_node_check_compatible() returns 0 if the given node contains a
|
|
|
+ * 'compatible' property with the given string as one of its elements,
|
|
|
+ * it returns non-zero otherwise, or on error.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, if the node has a 'compatible' property listing the given string
|
|
|
+ * 1, if the node has a 'compatible' property, but it does not list
|
|
|
+ * the given string
|
|
|
+ * -FDT_ERR_NOTFOUND, if the given node has no 'compatible' property
|
|
|
+ * -FDT_ERR_BADOFFSET, if nodeoffset does not refer to a BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE, standard meanings
|
|
|
+ */
|
|
|
+int fdt_node_check_compatible(const void *fdt, int nodeoffset,
|
|
|
+ const char *compatible);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_node_offset_by_compatible - find nodes with a given 'compatible' value
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @startoffset: only find nodes after this offset
|
|
|
+ * @compatible: 'compatible' string to match against
|
|
|
+ *
|
|
|
+ * fdt_node_offset_by_compatible() returns the offset of the first
|
|
|
+ * node after startoffset, which has a 'compatible' property which
|
|
|
+ * lists the given compatible string; or if startoffset is -1, the
|
|
|
+ * very first such node in the tree.
|
|
|
+ *
|
|
|
+ * To iterate through all nodes matching the criterion, the following
|
|
|
+ * idiom can be used:
|
|
|
+ * offset = fdt_node_offset_by_compatible(fdt, -1, compatible);
|
|
|
+ * while (offset != -FDT_ERR_NOTFOUND) {
|
|
|
+ * // other code here
|
|
|
+ * offset = fdt_node_offset_by_compatible(fdt, offset, compatible);
|
|
|
+ * }
|
|
|
+ *
|
|
|
+ * Note the -1 in the first call to the function, if 0 is used here
|
|
|
+ * instead, the function will never locate the root node, even if it
|
|
|
+ * matches the criterion.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * structure block offset of the located node (>= 0, >startoffset),
|
|
|
+ * on success
|
|
|
+ * -FDT_ERR_NOTFOUND, no node matching the criterion exists in the
|
|
|
+ * tree after startoffset
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset does not refer to a BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE, standard meanings
|
|
|
+ */
|
|
|
+int fdt_node_offset_by_compatible(const void *fdt, int startoffset,
|
|
|
+ const char *compatible);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_stringlist_contains - check a string list property for a string
|
|
|
+ * @strlist: Property containing a list of strings to check
|
|
|
+ * @listlen: Length of property
|
|
|
+ * @str: String to search for
|
|
|
+ *
|
|
|
+ * This is a utility function provided for convenience. The list contains
|
|
|
+ * one or more strings, each terminated by \0, as is found in a device tree
|
|
|
+ * "compatible" property.
|
|
|
+ *
|
|
|
+ * @return: 1 if the string is found in the list, 0 not found, or invalid list
|
|
|
+ */
|
|
|
+int fdt_stringlist_contains(const char *strlist, int listlen, const char *str);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_stringlist_count - count the number of strings in a string list
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of a tree node
|
|
|
+ * @property: name of the property containing the string list
|
|
|
+ * @return:
|
|
|
+ * the number of strings in the given property
|
|
|
+ * -FDT_ERR_BADVALUE if the property value is not NUL-terminated
|
|
|
+ * -FDT_ERR_NOTFOUND if the property does not exist
|
|
|
+ */
|
|
|
+int fdt_stringlist_count(const void *fdt, int nodeoffset, const char *property);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_stringlist_search - find a string in a string list and return its index
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of a tree node
|
|
|
+ * @property: name of the property containing the string list
|
|
|
+ * @string: string to look up in the string list
|
|
|
+ *
|
|
|
+ * Note that it is possible for this function to succeed on property values
|
|
|
+ * that are not NUL-terminated. That's because the function will stop after
|
|
|
+ * finding the first occurrence of @string. This can for example happen with
|
|
|
+ * small-valued cell properties, such as #address-cells, when searching for
|
|
|
+ * the empty string.
|
|
|
+ *
|
|
|
+ * @return:
|
|
|
+ * the index of the string in the list of strings
|
|
|
+ * -FDT_ERR_BADVALUE if the property value is not NUL-terminated
|
|
|
+ * -FDT_ERR_NOTFOUND if the property does not exist or does not contain
|
|
|
+ * the given string
|
|
|
+ */
|
|
|
+int fdt_stringlist_search(const void *fdt, int nodeoffset, const char *property,
|
|
|
+ const char *string);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_stringlist_get() - obtain the string at a given index in a string list
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of a tree node
|
|
|
+ * @property: name of the property containing the string list
|
|
|
+ * @index: index of the string to return
|
|
|
+ * @lenp: return location for the string length or an error code on failure
|
|
|
+ *
|
|
|
+ * Note that this will successfully extract strings from properties with
|
|
|
+ * non-NUL-terminated values. For example on small-valued cell properties
|
|
|
+ * this function will return the empty string.
|
|
|
+ *
|
|
|
+ * If non-NULL, the length of the string (on success) or a negative error-code
|
|
|
+ * (on failure) will be stored in the integer pointer to by lenp.
|
|
|
+ *
|
|
|
+ * @return:
|
|
|
+ * A pointer to the string at the given index in the string list or NULL on
|
|
|
+ * failure. On success the length of the string will be stored in the memory
|
|
|
+ * location pointed to by the lenp parameter, if non-NULL. On failure one of
|
|
|
+ * the following negative error codes will be returned in the lenp parameter
|
|
|
+ * (if non-NULL):
|
|
|
+ * -FDT_ERR_BADVALUE if the property value is not NUL-terminated
|
|
|
+ * -FDT_ERR_NOTFOUND if the property does not exist
|
|
|
+ */
|
|
|
+const char *fdt_stringlist_get(const void *fdt, int nodeoffset,
|
|
|
+ const char *property, int index,
|
|
|
+ int *lenp);
|
|
|
+
|
|
|
+/**********************************************************************/
|
|
|
+/* Read-only functions (addressing related) */
|
|
|
+/**********************************************************************/
|
|
|
+
|
|
|
+/**
|
|
|
+ * FDT_MAX_NCELLS - maximum value for #address-cells and #size-cells
|
|
|
+ *
|
|
|
+ * This is the maximum value for #address-cells, #size-cells and
|
|
|
+ * similar properties that will be processed by libfdt. IEE1275
|
|
|
+ * requires that OF implementations handle values up to 4.
|
|
|
+ * Implementations may support larger values, but in practice higher
|
|
|
+ * values aren't used.
|
|
|
+ */
|
|
|
+#define FDT_MAX_NCELLS 4
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_address_cells - retrieve address size for a bus represented in the tree
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node to find the address size for
|
|
|
+ *
|
|
|
+ * When the node has a valid #address-cells property, returns its value.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0 <= n < FDT_MAX_NCELLS, on success
|
|
|
+ * 2, if the node has no #address-cells property
|
|
|
+ * -FDT_ERR_BADNCELLS, if the node has a badly formatted or invalid
|
|
|
+ * #address-cells property
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+int fdt_address_cells(const void *fdt, int nodeoffset);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_size_cells - retrieve address range size for a bus represented in the
|
|
|
+ * tree
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node to find the address range size for
|
|
|
+ *
|
|
|
+ * When the node has a valid #size-cells property, returns its value.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0 <= n < FDT_MAX_NCELLS, on success
|
|
|
+ * 2, if the node has no #address-cells property
|
|
|
+ * -FDT_ERR_BADNCELLS, if the node has a badly formatted or invalid
|
|
|
+ * #size-cells property
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+int fdt_size_cells(const void *fdt, int nodeoffset);
|
|
|
+
|
|
|
+
|
|
|
+/**********************************************************************/
|
|
|
+/* Write-in-place functions */
|
|
|
+/**********************************************************************/
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_setprop_inplace_namelen_partial - change a property's value,
|
|
|
+ * but not its size
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose property to change
|
|
|
+ * @name: name of the property to change
|
|
|
+ * @namelen: number of characters of name to consider
|
|
|
+ * @idx: index of the property to change in the array
|
|
|
+ * @val: pointer to data to replace the property value with
|
|
|
+ * @len: length of the property value
|
|
|
+ *
|
|
|
+ * Identical to fdt_setprop_inplace(), but modifies the given property
|
|
|
+ * starting from the given index, and using only the first characters
|
|
|
+ * of the name. It is useful when you want to manipulate only one value of
|
|
|
+ * an array and you have a string that doesn't end with \0.
|
|
|
+ */
|
|
|
+#ifndef SWIG /* Not available in Python */
|
|
|
+int fdt_setprop_inplace_namelen_partial(void *fdt, int nodeoffset,
|
|
|
+ const char *name, int namelen,
|
|
|
+ uint32_t idx, const void *val,
|
|
|
+ int len);
|
|
|
+#endif
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_setprop_inplace - change a property's value, but not its size
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose property to change
|
|
|
+ * @name: name of the property to change
|
|
|
+ * @val: pointer to data to replace the property value with
|
|
|
+ * @len: length of the property value
|
|
|
+ *
|
|
|
+ * fdt_setprop_inplace() replaces the value of a given property with
|
|
|
+ * the data in val, of length len. This function cannot change the
|
|
|
+ * size of a property, and so will only work if len is equal to the
|
|
|
+ * current length of the property.
|
|
|
+ *
|
|
|
+ * This function will alter only the bytes in the blob which contain
|
|
|
+ * the given property value, and will not alter or move any other part
|
|
|
+ * of the tree.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, on success
|
|
|
+ * -FDT_ERR_NOSPACE, if len is not equal to the property's current length
|
|
|
+ * -FDT_ERR_NOTFOUND, node does not have the named property
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+#ifndef SWIG /* Not available in Python */
|
|
|
+int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
|
|
|
+ const void *val, int len);
|
|
|
+#endif
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_setprop_inplace_u32 - change the value of a 32-bit integer property
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose property to change
|
|
|
+ * @name: name of the property to change
|
|
|
+ * @val: 32-bit integer value to replace the property with
|
|
|
+ *
|
|
|
+ * fdt_setprop_inplace_u32() replaces the value of a given property
|
|
|
+ * with the 32-bit integer value in val, converting val to big-endian
|
|
|
+ * if necessary. This function cannot change the size of a property,
|
|
|
+ * and so will only work if the property already exists and has length
|
|
|
+ * 4.
|
|
|
+ *
|
|
|
+ * This function will alter only the bytes in the blob which contain
|
|
|
+ * the given property value, and will not alter or move any other part
|
|
|
+ * of the tree.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, on success
|
|
|
+ * -FDT_ERR_NOSPACE, if the property's length is not equal to 4
|
|
|
+ * -FDT_ERR_NOTFOUND, node does not have the named property
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+static inline int fdt_setprop_inplace_u32(void *fdt, int nodeoffset,
|
|
|
+ const char *name, uint32_t val)
|
|
|
+{
|
|
|
+ fdt32_t tmp = cpu_to_fdt32(val);
|
|
|
+ return fdt_setprop_inplace(fdt, nodeoffset, name, &tmp, sizeof(tmp));
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_setprop_inplace_u64 - change the value of a 64-bit integer property
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose property to change
|
|
|
+ * @name: name of the property to change
|
|
|
+ * @val: 64-bit integer value to replace the property with
|
|
|
+ *
|
|
|
+ * fdt_setprop_inplace_u64() replaces the value of a given property
|
|
|
+ * with the 64-bit integer value in val, converting val to big-endian
|
|
|
+ * if necessary. This function cannot change the size of a property,
|
|
|
+ * and so will only work if the property already exists and has length
|
|
|
+ * 8.
|
|
|
+ *
|
|
|
+ * This function will alter only the bytes in the blob which contain
|
|
|
+ * the given property value, and will not alter or move any other part
|
|
|
+ * of the tree.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, on success
|
|
|
+ * -FDT_ERR_NOSPACE, if the property's length is not equal to 8
|
|
|
+ * -FDT_ERR_NOTFOUND, node does not have the named property
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+static inline int fdt_setprop_inplace_u64(void *fdt, int nodeoffset,
|
|
|
+ const char *name, uint64_t val)
|
|
|
+{
|
|
|
+ fdt64_t tmp = cpu_to_fdt64(val);
|
|
|
+ return fdt_setprop_inplace(fdt, nodeoffset, name, &tmp, sizeof(tmp));
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_setprop_inplace_cell - change the value of a single-cell property
|
|
|
+ *
|
|
|
+ * This is an alternative name for fdt_setprop_inplace_u32()
|
|
|
+ */
|
|
|
+static inline int fdt_setprop_inplace_cell(void *fdt, int nodeoffset,
|
|
|
+ const char *name, uint32_t val)
|
|
|
+{
|
|
|
+ return fdt_setprop_inplace_u32(fdt, nodeoffset, name, val);
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_nop_property - replace a property with nop tags
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose property to nop
|
|
|
+ * @name: name of the property to nop
|
|
|
+ *
|
|
|
+ * fdt_nop_property() will replace a given property's representation
|
|
|
+ * in the blob with FDT_NOP tags, effectively removing it from the
|
|
|
+ * tree.
|
|
|
+ *
|
|
|
+ * This function will alter only the bytes in the blob which contain
|
|
|
+ * the property, and will not alter or move any other part of the
|
|
|
+ * tree.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, on success
|
|
|
+ * -FDT_ERR_NOTFOUND, node does not have the named property
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+int fdt_nop_property(void *fdt, int nodeoffset, const char *name);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_nop_node - replace a node (subtree) with nop tags
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node to nop
|
|
|
+ *
|
|
|
+ * fdt_nop_node() will replace a given node's representation in the
|
|
|
+ * blob, including all its subnodes, if any, with FDT_NOP tags,
|
|
|
+ * effectively removing it from the tree.
|
|
|
+ *
|
|
|
+ * This function will alter only the bytes in the blob which contain
|
|
|
+ * the node and its properties and subnodes, and will not alter or
|
|
|
+ * move any other part of the tree.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, on success
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+int fdt_nop_node(void *fdt, int nodeoffset);
|
|
|
+
|
|
|
+/**********************************************************************/
|
|
|
+/* Sequential write functions */
|
|
|
+/**********************************************************************/
|
|
|
+
|
|
|
+int fdt_create(void *buf, int bufsize);
|
|
|
+int fdt_resize(void *fdt, void *buf, int bufsize);
|
|
|
+int fdt_add_reservemap_entry(void *fdt, uint64_t addr, uint64_t size);
|
|
|
+int fdt_finish_reservemap(void *fdt);
|
|
|
+int fdt_begin_node(void *fdt, const char *name);
|
|
|
+int fdt_property(void *fdt, const char *name, const void *val, int len);
|
|
|
+static inline int fdt_property_u32(void *fdt, const char *name, uint32_t val)
|
|
|
+{
|
|
|
+ fdt32_t tmp = cpu_to_fdt32(val);
|
|
|
+ return fdt_property(fdt, name, &tmp, sizeof(tmp));
|
|
|
+}
|
|
|
+static inline int fdt_property_u64(void *fdt, const char *name, uint64_t val)
|
|
|
+{
|
|
|
+ fdt64_t tmp = cpu_to_fdt64(val);
|
|
|
+ return fdt_property(fdt, name, &tmp, sizeof(tmp));
|
|
|
+}
|
|
|
+static inline int fdt_property_cell(void *fdt, const char *name, uint32_t val)
|
|
|
+{
|
|
|
+ return fdt_property_u32(fdt, name, val);
|
|
|
+}
|
|
|
+#define fdt_property_string(fdt, name, str) \
|
|
|
+ fdt_property(fdt, name, str, strlen(str)+1)
|
|
|
+int fdt_end_node(void *fdt);
|
|
|
+int fdt_finish(void *fdt);
|
|
|
+
|
|
|
+/**********************************************************************/
|
|
|
+/* Read-write functions */
|
|
|
+/**********************************************************************/
|
|
|
+
|
|
|
+int fdt_create_empty_tree(void *buf, int bufsize);
|
|
|
+int fdt_open_into(const void *fdt, void *buf, int bufsize);
|
|
|
+int fdt_pack(void *fdt);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_add_mem_rsv - add one memory reserve map entry
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @address, @size: 64-bit values (native endian)
|
|
|
+ *
|
|
|
+ * Adds a reserve map entry to the given blob reserving a region at
|
|
|
+ * address address of length size.
|
|
|
+ *
|
|
|
+ * This function will insert data into the reserve map and will
|
|
|
+ * therefore change the indexes of some entries in the table.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, on success
|
|
|
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
|
|
|
+ * contain the new reservation entry
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+int fdt_add_mem_rsv(void *fdt, uint64_t address, uint64_t size);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_del_mem_rsv - remove a memory reserve map entry
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @n: entry to remove
|
|
|
+ *
|
|
|
+ * fdt_del_mem_rsv() removes the n-th memory reserve map entry from
|
|
|
+ * the blob.
|
|
|
+ *
|
|
|
+ * This function will delete data from the reservation table and will
|
|
|
+ * therefore change the indexes of some entries in the table.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, on success
|
|
|
+ * -FDT_ERR_NOTFOUND, there is no entry of the given index (i.e. there
|
|
|
+ * are less than n+1 reserve map entries)
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+int fdt_del_mem_rsv(void *fdt, int n);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_set_name - change the name of a given node
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: structure block offset of a node
|
|
|
+ * @name: name to give the node
|
|
|
+ *
|
|
|
+ * fdt_set_name() replaces the name (including unit address, if any)
|
|
|
+ * of the given node with the given string. NOTE: this function can't
|
|
|
+ * efficiently check if the new name is unique amongst the given
|
|
|
+ * node's siblings; results are undefined if this function is invoked
|
|
|
+ * with a name equal to one of the given node's siblings.
|
|
|
+ *
|
|
|
+ * This function may insert or delete data from the blob, and will
|
|
|
+ * therefore change the offsets of some existing nodes.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, on success
|
|
|
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob
|
|
|
+ * to contain the new name
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE, standard meanings
|
|
|
+ */
|
|
|
+int fdt_set_name(void *fdt, int nodeoffset, const char *name);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_setprop - create or change a property
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose property to change
|
|
|
+ * @name: name of the property to change
|
|
|
+ * @val: pointer to data to set the property value to
|
|
|
+ * @len: length of the property value
|
|
|
+ *
|
|
|
+ * fdt_setprop() sets the value of the named property in the given
|
|
|
+ * node to the given value and length, creating the property if it
|
|
|
+ * does not already exist.
|
|
|
+ *
|
|
|
+ * This function may insert or delete data from the blob, and will
|
|
|
+ * therefore change the offsets of some existing nodes.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, on success
|
|
|
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
|
|
|
+ * contain the new property value
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+int fdt_setprop(void *fdt, int nodeoffset, const char *name,
|
|
|
+ const void *val, int len);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_setprop_u32 - set a property to a 32-bit integer
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose property to change
|
|
|
+ * @name: name of the property to change
|
|
|
+ * @val: 32-bit integer value for the property (native endian)
|
|
|
+ *
|
|
|
+ * fdt_setprop_u32() sets the value of the named property in the given
|
|
|
+ * node to the given 32-bit integer value (converting to big-endian if
|
|
|
+ * necessary), or creates a new property with that value if it does
|
|
|
+ * not already exist.
|
|
|
+ *
|
|
|
+ * This function may insert or delete data from the blob, and will
|
|
|
+ * therefore change the offsets of some existing nodes.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, on success
|
|
|
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
|
|
|
+ * contain the new property value
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+static inline int fdt_setprop_u32(void *fdt, int nodeoffset, const char *name,
|
|
|
+ uint32_t val)
|
|
|
+{
|
|
|
+ fdt32_t tmp = cpu_to_fdt32(val);
|
|
|
+ return fdt_setprop(fdt, nodeoffset, name, &tmp, sizeof(tmp));
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_setprop_u64 - set a property to a 64-bit integer
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose property to change
|
|
|
+ * @name: name of the property to change
|
|
|
+ * @val: 64-bit integer value for the property (native endian)
|
|
|
+ *
|
|
|
+ * fdt_setprop_u64() sets the value of the named property in the given
|
|
|
+ * node to the given 64-bit integer value (converting to big-endian if
|
|
|
+ * necessary), or creates a new property with that value if it does
|
|
|
+ * not already exist.
|
|
|
+ *
|
|
|
+ * This function may insert or delete data from the blob, and will
|
|
|
+ * therefore change the offsets of some existing nodes.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, on success
|
|
|
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
|
|
|
+ * contain the new property value
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+static inline int fdt_setprop_u64(void *fdt, int nodeoffset, const char *name,
|
|
|
+ uint64_t val)
|
|
|
+{
|
|
|
+ fdt64_t tmp = cpu_to_fdt64(val);
|
|
|
+ return fdt_setprop(fdt, nodeoffset, name, &tmp, sizeof(tmp));
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_setprop_cell - set a property to a single cell value
|
|
|
+ *
|
|
|
+ * This is an alternative name for fdt_setprop_u32()
|
|
|
+ */
|
|
|
+static inline int fdt_setprop_cell(void *fdt, int nodeoffset, const char *name,
|
|
|
+ uint32_t val)
|
|
|
+{
|
|
|
+ return fdt_setprop_u32(fdt, nodeoffset, name, val);
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_setprop_string - set a property to a string value
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose property to change
|
|
|
+ * @name: name of the property to change
|
|
|
+ * @str: string value for the property
|
|
|
+ *
|
|
|
+ * fdt_setprop_string() sets the value of the named property in the
|
|
|
+ * given node to the given string value (using the length of the
|
|
|
+ * string to determine the new length of the property), or creates a
|
|
|
+ * new property with that value if it does not already exist.
|
|
|
+ *
|
|
|
+ * This function may insert or delete data from the blob, and will
|
|
|
+ * therefore change the offsets of some existing nodes.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, on success
|
|
|
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
|
|
|
+ * contain the new property value
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+#define fdt_setprop_string(fdt, nodeoffset, name, str) \
|
|
|
+ fdt_setprop((fdt), (nodeoffset), (name), (str), strlen(str)+1)
|
|
|
+
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_setprop_empty - set a property to an empty value
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose property to change
|
|
|
+ * @name: name of the property to change
|
|
|
+ *
|
|
|
+ * fdt_setprop_empty() sets the value of the named property in the
|
|
|
+ * given node to an empty (zero length) value, or creates a new empty
|
|
|
+ * property if it does not already exist.
|
|
|
+ *
|
|
|
+ * This function may insert or delete data from the blob, and will
|
|
|
+ * therefore change the offsets of some existing nodes.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, on success
|
|
|
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
|
|
|
+ * contain the new property value
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+#define fdt_setprop_empty(fdt, nodeoffset, name) \
|
|
|
+ fdt_setprop((fdt), (nodeoffset), (name), NULL, 0)
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_appendprop - append to or create a property
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose property to change
|
|
|
+ * @name: name of the property to append to
|
|
|
+ * @val: pointer to data to append to the property value
|
|
|
+ * @len: length of the data to append to the property value
|
|
|
+ *
|
|
|
+ * fdt_appendprop() appends the value to the named property in the
|
|
|
+ * given node, creating the property if it does not already exist.
|
|
|
+ *
|
|
|
+ * This function may insert data into the blob, and will therefore
|
|
|
+ * change the offsets of some existing nodes.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, on success
|
|
|
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
|
|
|
+ * contain the new property value
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+int fdt_appendprop(void *fdt, int nodeoffset, const char *name,
|
|
|
+ const void *val, int len);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_appendprop_u32 - append a 32-bit integer value to a property
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose property to change
|
|
|
+ * @name: name of the property to change
|
|
|
+ * @val: 32-bit integer value to append to the property (native endian)
|
|
|
+ *
|
|
|
+ * fdt_appendprop_u32() appends the given 32-bit integer value
|
|
|
+ * (converting to big-endian if necessary) to the value of the named
|
|
|
+ * property in the given node, or creates a new property with that
|
|
|
+ * value if it does not already exist.
|
|
|
+ *
|
|
|
+ * This function may insert data into the blob, and will therefore
|
|
|
+ * change the offsets of some existing nodes.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, on success
|
|
|
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
|
|
|
+ * contain the new property value
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+static inline int fdt_appendprop_u32(void *fdt, int nodeoffset,
|
|
|
+ const char *name, uint32_t val)
|
|
|
+{
|
|
|
+ fdt32_t tmp = cpu_to_fdt32(val);
|
|
|
+ return fdt_appendprop(fdt, nodeoffset, name, &tmp, sizeof(tmp));
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_appendprop_u64 - append a 64-bit integer value to a property
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose property to change
|
|
|
+ * @name: name of the property to change
|
|
|
+ * @val: 64-bit integer value to append to the property (native endian)
|
|
|
+ *
|
|
|
+ * fdt_appendprop_u64() appends the given 64-bit integer value
|
|
|
+ * (converting to big-endian if necessary) to the value of the named
|
|
|
+ * property in the given node, or creates a new property with that
|
|
|
+ * value if it does not already exist.
|
|
|
+ *
|
|
|
+ * This function may insert data into the blob, and will therefore
|
|
|
+ * change the offsets of some existing nodes.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, on success
|
|
|
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
|
|
|
+ * contain the new property value
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+static inline int fdt_appendprop_u64(void *fdt, int nodeoffset,
|
|
|
+ const char *name, uint64_t val)
|
|
|
+{
|
|
|
+ fdt64_t tmp = cpu_to_fdt64(val);
|
|
|
+ return fdt_appendprop(fdt, nodeoffset, name, &tmp, sizeof(tmp));
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_appendprop_cell - append a single cell value to a property
|
|
|
+ *
|
|
|
+ * This is an alternative name for fdt_appendprop_u32()
|
|
|
+ */
|
|
|
+static inline int fdt_appendprop_cell(void *fdt, int nodeoffset,
|
|
|
+ const char *name, uint32_t val)
|
|
|
+{
|
|
|
+ return fdt_appendprop_u32(fdt, nodeoffset, name, val);
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_appendprop_string - append a string to a property
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose property to change
|
|
|
+ * @name: name of the property to change
|
|
|
+ * @str: string value to append to the property
|
|
|
+ *
|
|
|
+ * fdt_appendprop_string() appends the given string to the value of
|
|
|
+ * the named property in the given node, or creates a new property
|
|
|
+ * with that value if it does not already exist.
|
|
|
+ *
|
|
|
+ * This function may insert data into the blob, and will therefore
|
|
|
+ * change the offsets of some existing nodes.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, on success
|
|
|
+ * -FDT_ERR_NOSPACE, there is insufficient free space in the blob to
|
|
|
+ * contain the new property value
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+#define fdt_appendprop_string(fdt, nodeoffset, name, str) \
|
|
|
+ fdt_appendprop((fdt), (nodeoffset), (name), (str), strlen(str)+1)
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_delprop - delete a property
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node whose property to nop
|
|
|
+ * @name: name of the property to nop
|
|
|
+ *
|
|
|
+ * fdt_del_property() will delete the given property.
|
|
|
+ *
|
|
|
+ * This function will delete data from the blob, and will therefore
|
|
|
+ * change the offsets of some existing nodes.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, on success
|
|
|
+ * -FDT_ERR_NOTFOUND, node does not have the named property
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+int fdt_delprop(void *fdt, int nodeoffset, const char *name);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_add_subnode_namelen - creates a new node based on substring
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @parentoffset: structure block offset of a node
|
|
|
+ * @name: name of the subnode to locate
|
|
|
+ * @namelen: number of characters of name to consider
|
|
|
+ *
|
|
|
+ * Identical to fdt_add_subnode(), but use only the first namelen
|
|
|
+ * characters of name as the name of the new node. This is useful for
|
|
|
+ * creating subnodes based on a portion of a larger string, such as a
|
|
|
+ * full path.
|
|
|
+ */
|
|
|
+#ifndef SWIG /* Not available in Python */
|
|
|
+int fdt_add_subnode_namelen(void *fdt, int parentoffset,
|
|
|
+ const char *name, int namelen);
|
|
|
+#endif
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_add_subnode - creates a new node
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @parentoffset: structure block offset of a node
|
|
|
+ * @name: name of the subnode to locate
|
|
|
+ *
|
|
|
+ * fdt_add_subnode() creates a new node as a subnode of the node at
|
|
|
+ * structure block offset parentoffset, with the given name (which
|
|
|
+ * should include the unit address, if any).
|
|
|
+ *
|
|
|
+ * This function will insert data into the blob, and will therefore
|
|
|
+ * change the offsets of some existing nodes.
|
|
|
+
|
|
|
+ * returns:
|
|
|
+ * structure block offset of the created nodeequested subnode (>=0), on
|
|
|
+ * success
|
|
|
+ * -FDT_ERR_NOTFOUND, if the requested subnode does not exist
|
|
|
+ * -FDT_ERR_BADOFFSET, if parentoffset did not point to an FDT_BEGIN_NODE
|
|
|
+ * tag
|
|
|
+ * -FDT_ERR_EXISTS, if the node at parentoffset already has a subnode of
|
|
|
+ * the given name
|
|
|
+ * -FDT_ERR_NOSPACE, if there is insufficient free space in the
|
|
|
+ * blob to contain the new node
|
|
|
+ * -FDT_ERR_NOSPACE
|
|
|
+ * -FDT_ERR_BADLAYOUT
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings.
|
|
|
+ */
|
|
|
+int fdt_add_subnode(void *fdt, int parentoffset, const char *name);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_del_node - delete a node (subtree)
|
|
|
+ * @fdt: pointer to the device tree blob
|
|
|
+ * @nodeoffset: offset of the node to nop
|
|
|
+ *
|
|
|
+ * fdt_del_node() will remove the given node, including all its
|
|
|
+ * subnodes if any, from the blob.
|
|
|
+ *
|
|
|
+ * This function will delete data from the blob, and will therefore
|
|
|
+ * change the offsets of some existing nodes.
|
|
|
+ *
|
|
|
+ * returns:
|
|
|
+ * 0, on success
|
|
|
+ * -FDT_ERR_BADOFFSET, nodeoffset did not point to FDT_BEGIN_NODE tag
|
|
|
+ * -FDT_ERR_BADLAYOUT,
|
|
|
+ * -FDT_ERR_BADMAGIC,
|
|
|
+ * -FDT_ERR_BADVERSION,
|
|
|
+ * -FDT_ERR_BADSTATE,
|
|
|
+ * -FDT_ERR_BADSTRUCTURE,
|
|
|
+ * -FDT_ERR_TRUNCATED, standard meanings
|
|
|
+ */
|
|
|
+int fdt_del_node(void *fdt, int nodeoffset);
|
|
|
+
|
|
|
+/**
|
|
|
+ * fdt_overlay_apply - Applies a DT overlay on a base DT
|
|
|
+ * @fdt: pointer to the base device tree blob
|
|
|
+ * @fdto: pointer to the device tree overlay blob
|
|
|
+ *
|
|
|
+ * fdt_overlay_apply() will apply the given device tree overlay on the
|
|
|
+ * given base device tree.
|
|
|
+ *
|
|
|
+ * Expect the base device tree to be modified, even if the function
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+ * returns an error.
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+ *
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+ * returns:
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+ * 0, on success
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+ * -FDT_ERR_NOSPACE, there's not enough space in the base device tree
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+ * -FDT_ERR_NOTFOUND, the overlay points to some inexistant nodes or
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+ * properties in the base DT
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+ * -FDT_ERR_BADPHANDLE,
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+ * -FDT_ERR_BADOVERLAY,
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+ * -FDT_ERR_NOPHANDLES,
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+ * -FDT_ERR_INTERNAL,
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+ * -FDT_ERR_BADLAYOUT,
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+ * -FDT_ERR_BADMAGIC,
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+ * -FDT_ERR_BADOFFSET,
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+ * -FDT_ERR_BADPATH,
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+ * -FDT_ERR_BADVERSION,
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+ * -FDT_ERR_BADSTRUCTURE,
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+ * -FDT_ERR_BADSTATE,
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+ * -FDT_ERR_TRUNCATED, standard meanings
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+ */
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+int fdt_overlay_apply(void *fdt, void *fdto);
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+
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+/**********************************************************************/
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+/* Debugging / informational functions */
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+/**********************************************************************/
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+
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+const char *fdt_strerror(int errval);
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+
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+#endif /* _LIBFDT_H */
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宋超