[Crosstoolchain-logs] [device-tree-compiler] 16/198: libfdt: Add support for appending the values to a existing property
Hector Oron
zumbi at moszumanska.debian.org
Thu Dec 8 17:06:49 UTC 2016
This is an automated email from the git hooks/post-receive script.
zumbi pushed a commit to branch upstream/1.4.x
in repository device-tree-compiler.
commit a31e3ef83bfce62d07695355e5f06cd4d0e44b86
Author: Minghuan Lian <Minghuan.Lian at freescale.com>
Date: Mon Dec 5 12:22:07 2011 +1100
libfdt: Add support for appending the values to a existing property
Some properties may contain multiple values, these values may need
to be added to the property respectively. this patch provides this
functionality. The main purpose of fdt_append_prop() is to append
the values to a existing property, or create a new property if it
dose not exist.
Signed-off-by: Minghuan Lian <Minghuan.Lian at freescale.com>
Signed-off-by: David Gibson <david at gibson.dropbear.id.au>
---
libfdt/fdt_rw.c | 27 +++++++++++++++
libfdt/libfdt.h | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++++
tests/appendprop.dts | 7 ++++
tests/appendprop1.c | 70 ++++++++++++++++++++++++++++++++++++++
tests/appendprop2.c | 64 +++++++++++++++++++++++++++++++++++
5 files changed, 263 insertions(+)
diff --git a/libfdt/fdt_rw.c b/libfdt/fdt_rw.c
index 994037b..24437df 100644
--- a/libfdt/fdt_rw.c
+++ b/libfdt/fdt_rw.c
@@ -289,6 +289,33 @@ int fdt_setprop(void *fdt, int nodeoffset, const char *name,
return 0;
}
+int fdt_appendprop(void *fdt, int nodeoffset, const char *name,
+ const void *val, int len)
+{
+ struct fdt_property *prop;
+ int err, oldlen, newlen;
+
+ FDT_RW_CHECK_HEADER(fdt);
+
+ prop = fdt_get_property_w(fdt, nodeoffset, name, &oldlen);
+ if (prop) {
+ newlen = len + oldlen;
+ err = _fdt_splice_struct(fdt, prop->data,
+ FDT_TAGALIGN(oldlen),
+ FDT_TAGALIGN(newlen));
+ if (err)
+ return err;
+ prop->len = cpu_to_fdt32(newlen);
+ memcpy(prop->data + oldlen, val, len);
+ } else {
+ err = _fdt_add_property(fdt, nodeoffset, name, len, &prop);
+ if (err)
+ return err;
+ memcpy(prop->data, val, len);
+ }
+ return 0;
+}
+
int fdt_delprop(void *fdt, int nodeoffset, const char *name)
{
struct fdt_property *prop;
diff --git a/libfdt/libfdt.h b/libfdt/libfdt.h
index 55f3eb3..060479e 100644
--- a/libfdt/libfdt.h
+++ b/libfdt/libfdt.h
@@ -1134,6 +1134,101 @@ static inline int fdt_setprop_cell(void *fdt, int nodeoffset, const char *name,
fdt_setprop((fdt), (nodeoffset), (name), (str), strlen(str)+1)
/**
+ * 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_cell - append a single cell 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_cell() appends the given cell 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_cell(void *fdt, int nodeoffset,
+ const char *name, uint32_t val)
+{
+ val = cpu_to_fdt32(val);
+ return fdt_appendprop(fdt, nodeoffset, name, &val, sizeof(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
diff --git a/tests/appendprop.dts b/tests/appendprop.dts
new file mode 100644
index 0000000..6e3a3eb
--- /dev/null
+++ b/tests/appendprop.dts
@@ -0,0 +1,7 @@
+/dts-v1/;
+
+/ {
+ prop-str = "hello world", "nastystring: \a\b\t\n\v\f\r\\\"";
+ prop-int = <0xdeadbeef 123456789>;
+ prop-bytes = [00010203040001020304];
+};
diff --git a/tests/appendprop1.c b/tests/appendprop1.c
new file mode 100644
index 0000000..180d296
--- /dev/null
+++ b/tests/appendprop1.c
@@ -0,0 +1,70 @@
+/*
+ * libfdt - Flat Device Tree manipulation
+ * Testcase for fdt_appendprop()
+ * Copyright (C) 2006 David Gibson, IBM Corporation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <stdint.h>
+
+#include <fdt.h>
+#include <libfdt.h>
+
+#include "tests.h"
+#include "testdata.h"
+
+#define SPACE 65536
+
+#define CHECK(code) \
+ { \
+ err = (code); \
+ if (err) \
+ FAIL(#code ": %s", fdt_strerror(err)); \
+ }
+
+int main(int argc, char *argv[])
+{
+ void *fdt;
+ int err;
+ uint8_t bytes[] = {0x00, 0x01, 0x02, 0x03, 0x04};
+
+ test_init(argc, argv);
+
+ /* Create an empty tree first */
+ fdt = xmalloc(SPACE);
+ CHECK(fdt_create(fdt, SPACE));
+ CHECK(fdt_finish_reservemap(fdt));
+ CHECK(fdt_begin_node(fdt, ""));
+ CHECK(fdt_end_node(fdt));
+ CHECK(fdt_finish(fdt));
+
+ /* Now use appendprop to add properties */
+ CHECK(fdt_open_into(fdt, fdt, SPACE));
+
+ CHECK(fdt_appendprop(fdt, 0, "prop-bytes", bytes, sizeof(bytes)));
+ CHECK(fdt_appendprop_cell(fdt, 0, "prop-int", TEST_VALUE_1));
+ CHECK(fdt_appendprop_string(fdt, 0, "prop-str", TEST_STRING_1));
+
+ CHECK(fdt_pack(fdt));
+
+ save_blob("appendprop1.test.dtb", fdt);
+
+ PASS();
+}
diff --git a/tests/appendprop2.c b/tests/appendprop2.c
new file mode 100644
index 0000000..d651a89
--- /dev/null
+++ b/tests/appendprop2.c
@@ -0,0 +1,64 @@
+/*
+ * libfdt - Flat Device Tree manipulation
+ * Testcase for fdt_appendprop()
+ * Copyright (C) 2006 David Gibson, IBM Corporation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <stdint.h>
+
+#include <fdt.h>
+#include <libfdt.h>
+
+#include "tests.h"
+#include "testdata.h"
+
+#define SPACE 65536
+
+#define CHECK(code) \
+ { \
+ err = (code); \
+ if (err) \
+ FAIL(#code ": %s", fdt_strerror(err)); \
+ }
+
+int main(int argc, char *argv[])
+{
+ void *fdt, *buf;
+ int err;
+ uint8_t bytes[] = {0x00, 0x01, 0x02, 0x03, 0x04};
+
+ test_init(argc, argv);
+ fdt = load_blob_arg(argc, argv);
+
+ buf = xmalloc(SPACE);
+ CHECK(fdt_open_into(fdt, buf, SPACE));
+ fdt = buf;
+
+ CHECK(fdt_appendprop(fdt, 0, "prop-bytes", bytes, sizeof(bytes)));
+ CHECK(fdt_appendprop_cell(fdt, 0, "prop-int", TEST_VALUE_2));
+ CHECK(fdt_appendprop_string(fdt, 0, "prop-str", TEST_STRING_2));
+
+ CHECK(fdt_pack(fdt));
+
+ save_blob("appendprop2.test.dtb", fdt);
+
+ PASS();
+}
--
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