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-rw-r--r--commands/Kconfig7
-rw-r--r--commands/Makefile1
-rw-r--r--commands/of_diff.c108
3 files changed, 116 insertions, 0 deletions
diff --git a/commands/Kconfig b/commands/Kconfig
index 30d0226..ad65fec 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -2023,6 +2023,13 @@ config CMD_LSMOD
help
List loaded barebox modules.
+config CMD_OF_DIFF
+ tristate
+ select OFTREE
+ prompt "of_diff"
+ help
+ Compare two device tree files against each other.
+
config CMD_OF_DUMP
tristate
select OFTREE
diff --git a/commands/Makefile b/commands/Makefile
index 62fbf1a..85adc32 100644
--- a/commands/Makefile
+++ b/commands/Makefile
@@ -73,6 +73,7 @@ obj-$(CONFIG_CMD_LED_TRIGGER) += trigger.o
obj-$(CONFIG_CMD_USB) += usb.o
obj-$(CONFIG_CMD_TIME) += time.o
obj-$(CONFIG_CMD_OFTREE) += oftree.o
+obj-$(CONFIG_CMD_OF_DIFF) += of_diff.o
obj-$(CONFIG_CMD_OF_PROPERTY) += of_property.o
obj-$(CONFIG_CMD_OF_NODE) += of_node.o
obj-$(CONFIG_CMD_OF_DUMP) += of_dump.o
diff --git a/commands/of_diff.c b/commands/of_diff.c
new file mode 100644
index 0000000..8ef006d
--- /dev/null
+++ b/commands/of_diff.c
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * of_diff.c - compare device tree files
+ *
+ * Copyright (c) 2019 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ *
+ */
+
+#include <common.h>
+#include <fs.h>
+#include <libfile.h>
+#include <of.h>
+#include <command.h>
+#include <malloc.h>
+#include <complete.h>
+#include <errno.h>
+#include <linux/err.h>
+
+static struct device_node *get_tree(const char *filename, struct device_node *root)
+{
+ struct device_node *node;
+ void *fdt;
+ size_t size;
+ int ret;
+
+ if (!strcmp(filename, "-")) {
+ node = of_get_root_node();
+ if (!node)
+ return ERR_PTR(-ENOENT);
+
+ return of_copy_node(NULL, node);
+ }
+
+ if (!strcmp(filename, "+")) {
+ node = of_get_root_node();
+ if (!node)
+ return ERR_PTR(-ENOENT);
+
+ node = of_copy_node(NULL, root);
+
+ of_fix_tree(node);
+
+ return node;
+ }
+
+ ret = read_file_2(filename, &size, &fdt, FILESIZE_MAX);
+ if (ret)
+ return ERR_PTR(ret);
+
+ node = of_unflatten_dtb(fdt);
+
+ free(fdt);
+
+ return node;
+}
+
+static int do_of_diff(int argc, char *argv[])
+{
+ int ret = 0;
+ struct device_node *a, *b, *root;
+
+ if (argc < 3)
+ return COMMAND_ERROR_USAGE;
+
+ root = of_get_root_node();
+ a = get_tree(argv[1], root);
+ b = get_tree(argv[2], root);
+
+ if (IS_ERR(a)) {
+ printf("Cannot read %s: %s\n", argv[1], strerrorp(a));
+ ret = COMMAND_ERROR;
+ a = NULL;
+ goto out;
+ }
+
+ if (IS_ERR(b)) {
+ printf("Cannot read %s: %s\n", argv[2], strerrorp(b));
+ ret = COMMAND_ERROR;
+ b = NULL;
+ goto out;
+ }
+
+ of_diff(a, b, 0);
+
+ ret = 0;
+out:
+ if (a && a != root)
+ of_delete_node(a);
+ if (b && b != root)
+ of_delete_node(b);
+
+ return ret;
+}
+
+BAREBOX_CMD_HELP_START(of_diff)
+BAREBOX_CMD_HELP_TEXT("This command prints a diff between two given device trees.")
+BAREBOX_CMD_HELP_TEXT("The device trees are given as dtb files or:")
+BAREBOX_CMD_HELP_TEXT("'-' to compare against the barebox live tree, or")
+BAREBOX_CMD_HELP_TEXT("'+' to compare against the fixed barebox live tree")
+BAREBOX_CMD_HELP_END
+
+BAREBOX_CMD_START(of_diff)
+ .cmd = do_of_diff,
+ BAREBOX_CMD_DESC("diff device trees")
+ BAREBOX_CMD_OPTS("<a> <b>")
+ BAREBOX_CMD_GROUP(CMD_GRP_MISC)
+ BAREBOX_CMD_HELP(cmd_of_diff_help)
+BAREBOX_CMD_END