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dts: renamed FIT_EMBED to MULTI_DTB_FIT and moved it to the dts Kconfig
CONFIG_FIT_EMBED might be confused with CONFIG_OF_EMBED, rename it MULTI_DTB_FIT as it is able to get a DTB from a FIT image containing multiple DTBs. Also move the option to the Kconfig dedicated to the DTS options and create a README for this feature. Signed-off-by: Jean-Jacques Hiblot <[email protected]> Reviewed-by: Tom Rini <[email protected]> Reviewed-by: Simon Glass <[email protected]>
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Original file line number | Diff line number | Diff line change |
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MULTI DTB FIT | ||
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The purpose of this feature is to enable u-boot to select its DTB from a FIT | ||
appended at the end of the binary. | ||
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Usually the DTB is selected by the SPL and passed down to U-Boot. But some | ||
platforms don't use the SPL. In this case MULTI_DTB_FIT can used to provide | ||
U-Boot with a choice of DTBs. | ||
The relevant DTBs are packed into a FIT (list provided by CONFIG__OF_LIST). The | ||
FIT is automatically generated at the end of the compilation and appended to | ||
u-boot.bin so that U-Boot can locate it and select the correct DTB from inside | ||
the FIT. | ||
The selection is done using board_fit_config_name_match() (same as what the SPL | ||
uses to select the DTB for U-Boot). The selection happens during fdtdec_setup() | ||
which is called during before relocation by board_init_f(). |
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