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| author | Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> | 2013-08-15 14:01:40 +0100 |
|---|---|---|
| committer | Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> | 2013-08-21 10:24:44 +0100 |
| commit | 183912d352a242a276a7877852f107459a13aff9 (patch) | |
| tree | c9f10475a57b92ed1dc7f6c778e8953839955f36 /include/linux/of.h | |
| parent | 819d596568d82ffb85b0b5989a1567810fe66098 (diff) | |
| download | lwn-183912d352a242a276a7877852f107459a13aff9.tar.gz lwn-183912d352a242a276a7877852f107459a13aff9.zip | |
of: move of_get_cpu_node implementation to DT core library
This patch moves the generalized implementation of of_get_cpu_node from
PowerPC to DT core library, thereby adding support for retrieving cpu
node for a given logical cpu index on any architecture.
The CPU subsystem can now use this function to assign of_node in the
cpu device while registering CPUs.
It is recommended to use these helper function only in pre-SMP/early
initialisation stages to retrieve CPU device node pointers in logical
ordering. Once the cpu devices are registered, it can be retrieved easily
from cpu device of_node which avoids unnecessary parsing and matching.
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Grant Likely <grant.likely@linaro.org>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
Diffstat (limited to 'include/linux/of.h')
| -rw-r--r-- | include/linux/of.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/of.h b/include/linux/of.h index 1fd08ca23106..c0bb2f188048 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -266,6 +266,7 @@ extern int of_device_is_available(const struct device_node *device); 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); #define for_each_property_of_node(dn, pp) \ for (pp = dn->properties; pp != NULL; pp = pp->next) @@ -459,6 +460,12 @@ static inline const void *of_get_property(const struct device_node *node, return NULL; } +static inline struct device_node *of_get_cpu_node(int cpu, + unsigned int *thread) +{ + return NULL; +} + static inline int of_property_read_u64(const struct device_node *np, const char *propname, u64 *out_value) { |