Commit f42b0e18 authored by Rob Herring's avatar Rob Herring
Browse files

of: add node name compare helper functions 



In preparation to remove device_node.name pointer, add helper functions
for node name comparisons which are a common pattern throughout the kernel.

Cc: Frank Rowand <frowand.list@gmail.com>
Signed-off-by: default avatarRob Herring <robh@kernel.org>
parent 36156f92

drivers/of/base.c

+22 −0
Original line number Diff line number Diff line
@@ -54,6 +54,28 @@ DEFINE_MUTEX(of_mutex); 
 */

DEFINE_RAW_SPINLOCK(devtree_lock);



bool of_node_name_eq(const struct device_node *np, const char *name)

{

	const char *node_name;

	size_t len;



	if (!np)

		return false;



	node_name = kbasename(np->full_name);

	len = strchrnul(node_name, '@') - node_name;



	return (strlen(name) == len) && (strncmp(node_name, name, len) == 0);

}



bool of_node_name_prefix(const struct device_node *np, const char *prefix)

{

	if (!np)

		return false;



	return strncmp(kbasename(np->full_name), prefix, strlen(prefix)) == 0;

}



int of_n_addr_cells(struct device_node *np)

{

	u32 cells;

include/linux/of.h

+13 −0
Original line number Diff line number Diff line
@@ -256,6 +256,9 @@ static inline unsigned long of_read_ulong(const __be32 *cell, int size) 
#define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)

#define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)



extern bool of_node_name_eq(const struct device_node *np, const char *name);

extern bool of_node_name_prefix(const struct device_node *np, const char *prefix);



static inline const char *of_node_full_name(const struct device_node *np)

{

	return np ? np->full_name : "<no-node>";
@@ -563,6 +566,16 @@ static inline struct device_node *to_of_node(const struct fwnode_handle *fwnode) 
	return NULL;

}



static inline bool of_node_name_eq(const struct device_node *np, const char *name)

{

	return false;

}



static inline bool of_node_name_prefix(const struct device_node *np, const char *prefix)

{

	return false;

}



static inline const char* of_node_full_name(const struct device_node *np)

{

	return "<no-node>";