Add a Kconfig option to enable this feature.
Signed-off-by: Simon Glass sjg@chromium.org ---
dts/Kconfig | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+)
diff --git a/dts/Kconfig b/dts/Kconfig index c56c129..4b7d8b1 100644 --- a/dts/Kconfig +++ b/dts/Kconfig @@ -85,4 +85,25 @@ config OF_SPL_REMOVE_PROPS can be discarded. This option defines the list of properties to discard.
+config SPL_OF_PLATDATA + bool "Generate platform data for use in SPL" + depends on SPL_OF_CONTROL + help + For very constrained SPL environments the overhead of decoding + device tree nodes and converting their contents into platform data + is too large. This overhead includes libfdt code as well as the + device tree contents itself. The latter is fairly compact, but the + former can add 3KB or more to a Thumb 2 Image. + + This option enables generation of platform data from the device + tree as C code. This code creates devices using U_BOOT_DEVICE() + declarations. The benefit is that it allows driver code to access + the platform data directly in C structures, avoidin the libfdt + overhead. + + This option works by generating C structure declarations for each + compatible string, then adding platform data and U_BOOT_DEVICE + declarations for each node. See README.platdata for more + information. + endmenu