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of/flattree: Add Kconfig for EARLY_FLATTREE

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The device tree code is now in two pieces: some which can be used generically
on any platform which selects CONFIG_OF_FLATTREE, and some early which is used
at boot time on only a few architectures.  This patch segregates the early
code so that only those architectures which care about it need compile it.
This also means that some of the requirements in the early code (such as
a cmd_line variable) that most architectures (e.g. X86) don't provide
can be ignored.

Signed-off-by: Stephen Neuendorffer <[email protected]>
[[email protected]: remove extra blank line addition]
[[email protected]: fixed incorrect #ifdef CONFIG_EARLY_FLATTREE check]
[[email protected]: Made OF_EARLY_FLATTREE select instead of depend
                            on OF_FLATTREE]
Signed-off-by: Grant Likely <[email protected]>
This commit is contained in:
Stephen Neuendorffer 2010-11-18 15:54:56 -08:00 • committed by Grant Likely
commit e6ce1324e4
5 changed files with 11 additions and 3 deletions
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4
drivers/of/Kconfig
View file

@ -19,6 +19,10 @@ config OF_FLATTREE
bool
select DTC
config OF_EARLY_FLATTREE
bool
select OF_FLATTREE
config OF_PROMTREE
bool

4
drivers/of/fdt.c
View file

@ -27,6 +27,8 @@ int __initdata dt_root_size_cells;
struct boot_param_header *initial_boot_params;
#ifdef CONFIG_OF_EARLY_FLATTREE
char *find_flat_dt_string(u32 offset)
{
return ((char *)initial_boot_params) +
@ -604,3 +606,5 @@ void __init unflatten_device_tree(void)
pr_debug(" <- unflatten_device_tree()\n");
}
#endif /* CONFIG_OF_EARLY_FLATTREE */