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: Rob Herring <robh@kernel.org>
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@ -54,6 +54,28 @@ DEFINE_MUTEX(of_mutex);
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*/
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*/
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DEFINE_RAW_SPINLOCK(devtree_lock);
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DEFINE_RAW_SPINLOCK(devtree_lock);
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bool of_node_name_eq(const struct device_node *np, const char *name)
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{
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const char *node_name;
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size_t len;
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if (!np)
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return false;
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node_name = kbasename(np->full_name);
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len = strchrnul(node_name, '@') - node_name;
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return (strlen(name) == len) && (strncmp(node_name, name, len) == 0);
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}
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bool of_node_name_prefix(const struct device_node *np, const char *prefix)
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{
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if (!np)
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return false;
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return strncmp(kbasename(np->full_name), prefix, strlen(prefix)) == 0;
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}
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int of_n_addr_cells(struct device_node *np)
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int of_n_addr_cells(struct device_node *np)
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{
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{
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u32 cells;
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u32 cells;
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@ -256,6 +256,9 @@ static inline unsigned long of_read_ulong(const __be32 *cell, int size)
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#define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
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#define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
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#define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
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#define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
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extern bool of_node_name_eq(const struct device_node *np, const char *name);
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extern bool of_node_name_prefix(const struct device_node *np, const char *prefix);
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static inline const char *of_node_full_name(const struct device_node *np)
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static inline const char *of_node_full_name(const struct device_node *np)
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{
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{
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return np ? np->full_name : "<no-node>";
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return np ? np->full_name : "<no-node>";
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@ -563,6 +566,16 @@ static inline struct device_node *to_of_node(const struct fwnode_handle *fwnode)
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return NULL;
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return NULL;
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}
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}
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static inline bool of_node_name_eq(const struct device_node *np, const char *name)
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{
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return false;
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}
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static inline bool of_node_name_prefix(const struct device_node *np, const char *prefix)
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{
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return false;
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}
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static inline const char* of_node_full_name(const struct device_node *np)
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static inline const char* of_node_full_name(const struct device_node *np)
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{
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{
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return "<no-node>";
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return "<no-node>";
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