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of: Add cpu node iterator for_each_of_cpu_node()

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Iterating thru cpu nodes is a common pattern. Create a common iterator
which can find child nodes either by node name or device_type == cpu.
Using the former will allow for eventually dropping device_type
properties which are deprecated for FDT.

Cc: Frank Rowand <frowand.list@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Rob Herring 2018-08-22 15:04:40 -05:00
parent f6707fd624
commit f1f207e43b
2 changed files with 50 additions and 0 deletions
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11
include/linux/of.h
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@ -353,6 +353,8 @@ extern const void *of_get_property(const struct device_node *node,
const char *name,
int *lenp);
extern struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
extern struct device_node *of_get_next_cpu_node(struct device_node *prev);
#define for_each_property_of_node(dn, pp) \
for (pp = dn->properties; pp != NULL; pp = pp->next)
@ -754,6 +756,11 @@ static inline struct device_node *of_get_cpu_node(int cpu,
return NULL;
}
static inline struct device_node *of_get_next_cpu_node(struct device_node *prev)
{
return NULL;
}
static inline int of_n_addr_cells(struct device_node *np)
{
return 0;
@ -1217,6 +1224,10 @@ static inline int of_property_read_s32(const struct device_node *np,
for (child = of_get_next_available_child(parent, NULL); child != NULL; \
child = of_get_next_available_child(parent, child))
#define for_each_of_cpu_node(cpu) \
for (cpu = of_get_next_cpu_node(NULL); cpu != NULL; \
cpu = of_get_next_cpu_node(cpu))
#define for_each_node_with_property(dn, prop_name) \
for (dn = of_find_node_with_property(NULL, prop_name); dn; \
dn = of_find_node_with_property(dn, prop_name))