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of: introduce common FDT machine related functions

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Introduce common of_flat_dt_match_machine and
of_flat_dt_get_machine_name functions to unify architectures' handling
of machine level model and compatible properties.

Several architectures match the root compatible string with an arch
specific list of machine descriptors duplicating the same search
algorithm. Create a common implementation with a simple architecture
specific hook to iterate over each machine's match table.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Grant Likely <grant.likely@linaro.org>
This commit is contained in:
Rob Herring
2013-08-27 21:41:56 -05:00
parent 9b7d9f27f6
commit 6a903a2551
2 changed files with 65 additions and 0 deletions
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5
include/linux/of_fdt.h
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@@ -108,11 +108,16 @@ extern int early_init_dt_scan_root(unsigned long node, const char *uname,
extern bool early_init_dt_scan(void *params);
extern const char *of_flat_dt_get_machine_name(void);
extern const void *of_flat_dt_match_machine(const void *default_match,
const void * (*get_next_compat)(const char * const**));
/* Other Prototypes */
extern void unflatten_device_tree(void);
extern void unflatten_and_copy_device_tree(void);
extern void early_init_devtree(void *);
#else /* CONFIG_OF_FLATTREE */
static inline const char *of_flat_dt_get_machine_name(void) { return NULL; }
static inline void unflatten_device_tree(void) {}
static inline void unflatten_and_copy_device_tree(void) {}
#endif /* CONFIG_OF_FLATTREE */