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 <[email protected]>
Signed-off-by: Rob Herring <[email protected]>
This commit is contained in:
Rob Herring 2018-08-27 07:50:47 -05:00
commit f42b0e18f2
2 changed files with 35 additions and 0 deletions

View file

@ -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;