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of/fdt: introduce of_get_flat_dt_size 

Add a wrapper function to retrieve the FDT size from the FDT header. This
is primarily to avoid libfdt include paths for the whole kernel.

Signed-off-by: Rob Herring <robh@kernel.org>
Tested-by: Grant Likely <grant.likely@linaro.org>
Tested-by: Stephen Chivers <schivers@csc.com>
This commit is contained in:
Rob Herring 2014-04-22 12:55:10 -05:00
parent 1d1a661da4
commit c0556d3f2c
2 changed files with 9 additions and 0 deletions
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8
drivers/of/fdt.c
View File

@ -553,6 +553,14 @@ unsigned long __init of_get_flat_dt_root(void)
return 0;
}
/**
* of_get_flat_dt_size - Return the total size of the FDT
*/
int __init of_get_flat_dt_size(void)
{
return fdt_totalsize(initial_boot_params);
}
/**
* of_get_flat_dt_prop - Given a node in the flat blob, return the property ptr
*

1
include/linux/of_fdt.h
View File

@ -92,6 +92,7 @@ extern const void *of_get_flat_dt_prop(unsigned long node, const char *name,
extern int of_flat_dt_is_compatible(unsigned long node, const char *name);
extern int of_flat_dt_match(unsigned long node, const char *const *matches);
extern unsigned long of_get_flat_dt_root(void);
extern int of_get_flat_dt_size(void);
extern int early_init_dt_scan_chosen(unsigned long node, const char *uname,
int depth, void *data);