spl: dm: Make it possible for the SPL to pick its own DTB from a FIT
u-boot can be embedded within a FIT image with multiple DTBs. It then
selects at run-time which one is best suited for the platform.
Use the same principle here for the SPL: put the DTBs in a FIT image,
compress it (LZO, GZIP, or no compression) and append it at the end of the
SPL.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
[trini: Move default y of SPL_MULTI_DTB_FIT_DYN_ALLOC to it being the
default choice if SYS_MALLOC_F, drop spl.h include from lib/fdtdec.c
it's unused.]
Signed-off-by Tom Rini <trini@konsulko.com>
diff --git a/dts/Kconfig b/dts/Kconfig
index 454acaa..daa757d 100644
--- a/dts/Kconfig
+++ b/dts/Kconfig
@@ -130,6 +130,89 @@
the correct DTB to be used. Use this if you need to support
multiple DTBs but don't use the SPL.
+
+config SPL_MULTI_DTB_FIT
+ depends on SPL_LOAD_FIT && SPL_OF_CONTROL && !SPL_OF_PLATDATA
+ bool "Support embedding several DTBs in a FIT image for the SPL"
+ help
+ This option provides the SPL with the ability to select its own
+ DTB at runtime from an appended FIT image containing several DTBs.
+ This allows using the same SPL binary on multiple platforms.
+ The primary purpose is to handle different versions of
+ the same platform without tweaking the platform code if the
+ differences can be expressed in the DTBs (common examples are: bus
+ capabilities, pad configurations).
+
+config SPL_OF_LIST
+ string "List of device tree files to include for DT control in SPL"
+ depends on SPL_MULTI_DTB_FIT
+ default OF_LIST
+ help
+ This option specifies a list of device tree files to use for DT
+ control in the SPL. These will be packaged into a FIT. At run-time,
+ the SPL will select the correct DT to use by examining the
+ hardware (e.g. reading a board ID value). This is a list of
+ device tree files (without the directory or .dtb suffix)
+ separated by <space>.
+
+choice
+ prompt "SPL OF LIST compression"
+ depends on SPL_MULTI_DTB_FIT
+ default SPL_MULTI_DTB_FIT_LZO
+
+config SPL_MULTI_DTB_FIT_LZO
+ bool "LZO"
+ depends on SYS_MALLOC_F
+ select SPL_LZO
+ help
+ Compress the FIT image containing the DTBs available for the SPL
+ using LZO compression. (requires lzop on host).
+
+config SPL_MULTI_DTB_FIT_GZIP
+ bool "GZIP"
+ depends on SYS_MALLOC_F
+ select SPL_GZIP
+ help
+ Compress the FIT image containing the DTBs available for the SPL
+ using GZIP compression. (requires gzip on host)
+
+config SPL_MULTI_DTB_FIT_NO_COMPRESSION
+ bool "No compression"
+ help
+ Do not compress the FIT image containing the DTBs available for the SPL.
+ Use this options only if LZO is not available and the DTBs are very small.
+endchoice
+
+choice
+ prompt "Location of uncompressed DTBs "
+ depends on (SPL_MULTI_DTB_FIT_GZIP || SPL_MULTI_DTB_FIT_LZO)
+ default SPL_MULTI_DTB_FIT_DYN_ALLOC if SYS_MALLOC_F
+
+config SPL_MULTI_DTB_FIT_DYN_ALLOC
+ bool "Dynamically allocate the memory"
+ depends on SYS_MALLOC_F
+
+config SPL_MULTI_DTB_FIT_USER_DEFINED_AREA
+ bool "User-defined location"
+endchoice
+
+config SPL_MULTI_DTB_FIT_UNCOMPRESS_SZ
+ hex "Size of memory reserved to uncompress the DTBs"
+ depends on (SPL_MULTI_DTB_FIT_GZIP || SPL_MULTI_DTB_FIT_LZO)
+ default 0x8000
+ help
+ This is the size of this area where the DTBs are uncompressed.
+ If this area is dynamically allocated, make sure that
+ SPL_SYS_MALLOC_F_LEN is big enough to contain it.
+
+config SPL_MULTI_DTB_FIT_USER_DEF_ADDR
+ hex "Address of memory where dtbs are uncompressed"
+ depends on SPL_MULTI_DTB_FIT_USER_DEFINED_AREA
+ help
+ the FIT image containing the DTBs is uncompressed in an area defined
+ at compilation time. This is the address of this area. It must be
+ aligned on 2-byte boundary.
+
config OF_SPL_REMOVE_PROPS
string "List of device tree properties to drop for SPL"
depends on SPL_OF_CONTROL