diff options
| author | Jean-Jacques Hiblot <jjhiblot@ti.com> | 2017-09-15 12:57:24 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2017-10-05 21:31:04 -0400 |
| commit | 11955590a284ecb75892aad5f1174ca1b94a709b (patch) | |
| tree | 7fb4c33ed9425437990c4994e778e768adc23248 /doc | |
| parent | 84570a0c111ac50372d51271eadc13ff5cbb1a54 (diff) | |
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 <jjhiblot@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/README.multi-dtb-fit | 15 |
1 files changed, 15 insertions, 0 deletions
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(). |