[PATCH 07/22] OF: base: sync of_find_node_by_path with linux OF API

[Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>]

Barebox of_find_node_by_path requires a node to be passed as start node
to start searching. Linux OF API does not pass this node and no current
user of it in barebox is passing anything else than the root node.
Therefore, the device_node argument is removed and all current users of
that function are updated to reflect the API change.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
---
Cc: barebox@lists.infradead.org
---
 arch/arm/boards/highbank/init.c |    4 ++--
 arch/ppc/mach-mpc5xxx/cpu.c     |    4 ++--
 commands/of_node.c              |    2 +-
 commands/of_property.c          |   10 ++--------
 commands/oftree.c               |   11 +----------
 common/oftree.c                 |    2 +-
 drivers/of/base.c               |   22 ++++++++++------------
 include/of.h                    |    9 +++++++--
 net/eth.c                       |    2 +-
 9 files changed, 27 insertions(+), 39 deletions(-)

diff --git a/arch/arm/boards/highbank/init.c b/arch/arm/boards/highbank/init.c
index d4a5c5a..1aa713b 100644
--- a/arch/arm/boards/highbank/init.c
+++ b/arch/arm/boards/highbank/init.c
@@ -53,7 +53,7 @@ static int hb_fixup(struct device_node *root)
 	if ((opp_table[0] >> 16) != HB_OPP_VERSION)
 		return 0;
 
-	node = of_find_node_by_path(root, "/cpus/cpu@0");
+	node = of_find_node_by_path("/cpus/cpu@0");
 	if (!node)
 		return 0;
 
@@ -89,7 +89,7 @@ static int highbank_mem_init(void)
 
 	of_set_root_node(root);
 
-	np = of_find_node_by_path(root, "/memory");
+	np = of_find_node_by_path("/memory");
 	if (!np) {
 		pr_warn("no memory node use default configuration\n");
 		goto not_found;
diff --git a/arch/ppc/mach-mpc5xxx/cpu.c b/arch/ppc/mach-mpc5xxx/cpu.c
index 99f16eb..0ece4a9 100644
--- a/arch/ppc/mach-mpc5xxx/cpu.c
+++ b/arch/ppc/mach-mpc5xxx/cpu.c
@@ -83,7 +83,7 @@ static int of_mpc5200_fixup(struct device_node *root)
 
 	int div = in_8((void*)CFG_MBAR + 0x204) & 0x0020 ? 8 : 4;
 
-	node = of_find_node_by_path(root, "/cpus/PowerPC,5200@0");
+	node = of_find_node_by_path("/cpus/PowerPC,5200@0");
 	if (!node)
 		return -EINVAL;
 
@@ -91,7 +91,7 @@ static int of_mpc5200_fixup(struct device_node *root)
 	of_property_write_u32(node, "bus-frequency", get_bus_clock());
 	of_property_write_u32(node, "clock-frequency", get_cpu_clock());
 
-	node = of_find_node_by_path(root, "/soc5200@f0000000");
+	node = of_find_node_by_path("/soc5200@f0000000");
 	if (!node)
 		return -EINVAL;
 
diff --git a/commands/of_node.c b/commands/of_node.c
index 0249d97..e60ef66 100644
--- a/commands/of_node.c
+++ b/commands/of_node.c
@@ -81,7 +81,7 @@ static int do_of_node(int argc, char *argv[])
 		if (!path)
 			return COMMAND_ERROR_USAGE;
 
-		node = of_find_node_by_path(root, path);
+		node = of_find_node_by_path(path);
 		if (!node) {
 			printf("Cannot find nodepath %s\n", path);
 			return -ENOENT;
diff --git a/commands/of_property.c b/commands/of_property.c
index d1a9a17..8ffe30b 100644
--- a/commands/of_property.c
+++ b/commands/of_property.c
@@ -175,7 +175,7 @@ static int do_of_property(int argc, char *argv[])
 	int set = 0;
 	int ret;
 	char *path = NULL, *propname = NULL;
-	struct device_node *root, *node = NULL;
+	struct device_node *node = NULL;
 	struct property *pp = NULL;
 
 	while ((opt = getopt(argc, argv, "ds")) > 0) {
@@ -194,15 +194,9 @@ static int do_of_property(int argc, char *argv[])
 	if (optind == argc)
 		return COMMAND_ERROR_USAGE;
 
-	root = of_get_root_node();
-	if (!root) {
-		printf("root node not set\n");
-		return -ENOENT;
-	}
-
 	if (optind < argc) {
 		path = argv[optind];
-		node = of_find_node_by_path(root, path);
+		node = of_find_node_by_path(path);
 		if (!node) {
 			printf("Cannot find nodepath %s\n", path);
 			return -ENOENT;
diff --git a/commands/oftree.c b/commands/oftree.c
index 468235a..9149517 100644
--- a/commands/oftree.c
+++ b/commands/oftree.c
@@ -164,16 +164,7 @@ static int do_oftree(int argc, char *argv[])
 			of_print_nodes(root, 0);
 			of_free(root);
 		} else {
-			struct device_node *root, *n;
-
-			root = of_get_root_node();
-			if (!root) {
-				ret = -ENOENT;
-				goto out;
-			}
-
-			n = of_find_node_by_path(root, node);
-
+			struct device_node *n = of_find_node_by_path(node);
 			if (!n) {
 				ret = -ENOENT;
 				goto out;
diff --git a/common/oftree.c b/common/oftree.c
index 475d418..aff4c28 100644
--- a/common/oftree.c
+++ b/common/oftree.c
@@ -100,7 +100,7 @@ void of_print_property(const void *data, int len)
 
 void of_print_cmdline(struct device_node *root)
 {
-	struct device_node *node = of_find_node_by_path(root, "/chosen");
+	struct device_node *node = of_find_node_by_path("/chosen");
 	const char *cmdline;
 
 	if (!node) {
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 85199b6..34793b3 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -153,7 +153,7 @@ void of_alias_scan(void)
 	if (!root_node)
 		return;
 
-	of_aliases = of_find_node_by_path(root_node, "/aliases");
+	of_aliases = of_find_node_by_path("/aliases");
 	if (!of_aliases)
 		return;
 
@@ -170,7 +170,7 @@ void of_alias_scan(void)
 		    !of_prop_cmp(pp->name, "linux,phandle"))
 			continue;
 
-		np = of_find_node_by_path(root_node, pp->value);
+		np = of_find_node_by_path(pp->value);
 		if (!np)
 			continue;
 
@@ -557,18 +557,16 @@ EXPORT_SYMBOL(of_machine_is_compatible);
 
 /**
  *	of_find_node_by_path - Find a node matching a full OF path
- *	@root:	The root node of this tree
  *	@path:	The full path to match
  *
- *	Returns a node pointer with refcount incremented, use
- *	of_node_put() on it when done.
+ *	Returns a pointer to the node found or NULL.
  */
-struct device_node *of_find_node_by_path(struct device_node *root, const char *path)
+struct device_node *of_find_node_by_path(const char *path)
 {
 	char *slash, *p, *freep;
-	struct device_node *dn = root;
+	struct device_node *dn = root_node;
 
-	if (*path != '/')
+	if (!dn || !path || *path != '/')
 		return NULL;
 
 	path++;
@@ -1156,12 +1154,12 @@ int of_probe(void)
 	if(!root_node)
 		return -ENODEV;
 
-	of_chosen = of_find_node_by_path(root_node, "/chosen");
+	of_chosen = of_find_node_by_path("/chosen");
 	of_property_read_string(root_node, "model", &of_model);
 
 	__of_parse_phandles(root_node);
 
-	memory = of_find_node_by_path(root_node, "/memory");
+	memory = of_find_node_by_path("/memory");
 	if (memory)
 		of_add_memory(memory, false);
 
@@ -1234,8 +1232,8 @@ int of_device_is_stdout_path(struct device_d *dev)
 	name = of_get_property(of_chosen, "linux,stdout-path", NULL);
 	if (name == NULL)
 		return 0;
-	dn = of_find_node_by_path(root_node, name);
 
+	dn = of_find_node_by_path(name);
 	if (!dn)
 		return 0;
 
@@ -1264,7 +1262,7 @@ int of_add_initrd(struct device_node *root, resource_size_t start,
 	struct device_node *chosen;
 	__be32 buf[2];
 
-	chosen = of_find_node_by_path(root, "/chosen");
+	chosen = of_find_node_by_path("/chosen");
 	if (!chosen)
 		return -EINVAL;
 
diff --git a/include/of.h b/include/of.h
index 7ebde62..871f5e9 100644
--- a/include/of.h
+++ b/include/of.h
@@ -67,8 +67,6 @@ int of_add_initrd(struct device_node *root, resource_size_t start,
 int of_n_addr_cells(struct device_node *np);
 int of_n_size_cells(struct device_node *np);
 
-struct device_node *of_find_node_by_path(struct device_node *root, const char *path);
-
 struct device_node *of_find_child_by_name(struct device_node *node, const char *name);
 
 struct fdt_header *fdt_get_tree(void);
@@ -184,6 +182,8 @@ struct cdev;
 extern struct property *of_find_property(const struct device_node *np,
 					const char *name, int *lenp);
 
+extern struct device_node *of_find_node_by_path(const char *path);
+
 extern void of_alias_scan(void);
 extern int of_alias_get_id(struct device_node *np, const char *stem);
 extern const char *of_alias_get(struct device_node *np);
@@ -235,6 +235,11 @@ static inline struct property *of_find_property(const struct device_node *np,
 	return NULL;
 }
 
+static inline struct device_node *of_find_node_by_path(const char *path)
+{
+	return NULL;
+}
+
 static inline void of_alias_scan(void)
 {
 }
diff --git a/net/eth.c b/net/eth.c
index 7240b4d..09b3bd5 100644
--- a/net/eth.c
+++ b/net/eth.c
@@ -296,7 +296,7 @@ static int eth_of_fixup(struct device_node *root)
 			continue;
 		}
 
-		node = of_find_node_by_path(root, edev->nodepath);
+		node = of_find_node_by_path(edev->nodepath);
 		if (!node) {
 			dev_dbg(&edev->dev, "%s: fixup node %s not found\n",
 					__func__, edev->nodepath);
-- 
1.7.2.5


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