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dm: Add an option to enable the of-platdata feature
Add a Kconfig option to enable this feature. Signed-off-by: Simon Glass <sjg@chromium.org>
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dts/Kconfig
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dts/Kconfig
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@ -85,4 +85,25 @@ config OF_SPL_REMOVE_PROPS
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can be discarded. This option defines the list of properties to
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discard.
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config SPL_OF_PLATDATA
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bool "Generate platform data for use in SPL"
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depends on SPL_OF_CONTROL
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help
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For very constrained SPL environments the overhead of decoding
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device tree nodes and converting their contents into platform data
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is too large. This overhead includes libfdt code as well as the
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device tree contents itself. The latter is fairly compact, but the
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former can add 3KB or more to a Thumb 2 Image.
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This option enables generation of platform data from the device
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tree as C code. This code creates devices using U_BOOT_DEVICE()
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declarations. The benefit is that it allows driver code to access
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the platform data directly in C structures, avoidin the libfdt
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overhead.
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This option works by generating C structure declarations for each
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compatible string, then adding platform data and U_BOOT_DEVICE
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declarations for each node. See README.platdata for more
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information.
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endmenu
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