summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--drivers/of/base.c26
-rw-r--r--include/linux/of.h7
2 files changed, 33 insertions, 0 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 26618ba8f92a..a9d6fe86585b 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -316,6 +316,32 @@ struct device_node *of_get_cpu_node(int cpu, unsigned int *thread)
EXPORT_SYMBOL(of_get_cpu_node);
/**
+ * of_cpu_node_to_id: Get the logical CPU number for a given device_node
+ *
+ * @cpu_node: Pointer to the device_node for CPU.
+ *
+ * Returns the logical CPU number of the given CPU device_node.
+ * Returns -ENODEV if the CPU is not found.
+ */
+int of_cpu_node_to_id(struct device_node *cpu_node)
+{
+ int cpu;
+ bool found = false;
+ struct device_node *np;
+
+ for_each_possible_cpu(cpu) {
+ np = of_cpu_device_node_get(cpu);
+ found = (cpu_node == np);
+ of_node_put(np);
+ if (found)
+ return cpu;
+ }
+
+ return -ENODEV;
+}
+EXPORT_SYMBOL(of_cpu_node_to_id);
+
+/**
* __of_device_is_compatible() - Check if the node matches given constraints
* @device: pointer to node
* @compat: required compatible string, NULL or "" for any match
diff --git a/include/linux/of.h b/include/linux/of.h
index d3dea1d1e3a9..173102dafb07 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -544,6 +544,8 @@ const char *of_prop_next_string(struct property *prop, const char *cur);
bool of_console_check(struct device_node *dn, char *name, int index);
+extern int of_cpu_node_to_id(struct device_node *np);
+
#else /* CONFIG_OF */
static inline void of_core_init(void)
@@ -916,6 +918,11 @@ static inline void of_property_clear_flag(struct property *p, unsigned long flag
{
}
+static inline int of_cpu_node_to_id(struct device_node *np)
+{
+ return -ENODEV;
+}
+
#define of_match_ptr(_ptr) NULL
#define of_match_node(_matches, _node) NULL
#endif /* CONFIG_OF */