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of: add config option to enable building of all dtbs

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Enable building all dtb files when CONFIG_OF_ALL_DTBS is enabled. The dtbs
are not really dependent on a platform being enabled or any other kernel
config, so for testing coverage it is convenient to build all of the dtbs.

In order to only build dtbs, this option can be used by creating an
allno.config file containing:
CONFIG_COMPILE_TEST=y
CONFIG_OF=y
CONFIG_OF_ALL_DTBS=y

And then running:
make KCONFIG_ALLCONFIG=1 allnoconfig
make dtbs

While building the dtbs themselves don't need a cross compiler, the
scripts dependency does need one. This can be hacked around by
commenting out "subdir-y += mod" in scripts/Makefile.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Frank Rowand <frowand.list@gmail.com>
Cc: Grant Likely <grant.likely@linaro.org>
This commit is contained in:
Rob Herring 2015-10-06 17:57:33 -05:00
parent 9ffecb1028
commit 1b7c501b51
1 changed files with 10 additions and 0 deletions
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10
drivers/of/Kconfig
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@ -23,6 +23,16 @@ config OF_UNITTEST
If unsure, say N here, but this option is safe to enable.
config OF_ALL_DTBS
bool "Build all Device Tree Blobs"
depends on COMPILE_TEST
select DTC
help
This option builds all possible Device Tree Blobs (DTBs) for the
current architecture.
If unsure, say N here, but this option is safe to enable.
config OF_FLATTREE
bool
select DTC