From 11955590a284ecb75892aad5f1174ca1b94a709b Mon Sep 17 00:00:00 2001 From: Jean-Jacques Hiblot Date: Fri, 15 Sep 2017 12:57:24 +0200 Subject: 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 Reviewed-by: Tom Rini Reviewed-by: Simon Glass --- doc/README.multi-dtb-fit | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 doc/README.multi-dtb-fit (limited to 'doc') diff --git a/doc/README.multi-dtb-fit b/doc/README.multi-dtb-fit new file mode 100644 index 0000000000..0d4f068bbf --- /dev/null +++ b/doc/README.multi-dtb-fit @@ -0,0 +1,15 @@ +MULTI DTB FIT + +The purpose of this feature is to enable u-boot to select its DTB from a FIT +appended at the end of the binary. + +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(). -- cgit v1.2.3