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spl: dm: Make it possible for the SPL to pick its own DTB from a FIT

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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>
This commit is contained in:
Jean-Jacques Hiblot
2017-09-15 12:57:32 +02:00
committed by Tom Rini
parent 035d64025c
commit 2f57c95100
4 changed files with 248 additions and 13 deletions
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83
dts/Kconfig
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@@ -130,6 +130,89 @@ config MULTI_DTB_FIT
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