diff options
| author | Philipp Tomsich <philipp.tomsich@theobroma-systems.com> | 2017-06-29 11:11:21 +0200 |
|---|---|---|
| committer | Philipp Tomsich <philipp.tomsich@theobroma-systems.com> | 2017-08-13 17:12:20 +0200 |
| commit | f291ce1298f078175bbe3c2e600d03cae173403f (patch) | |
| tree | 0e710ab791df111ce2393118c79e12a02adf14da /dts/Kconfig | |
| parent | 7c819e7f2258be88cd48521ae796421ed2303fde (diff) | |
spl: dm: Kconfig: split OF_CONTROL and OF_PLATDATA between SPL and TPL
For the RK3368, we want to use OF_PLATDATA in TPL, but full OF_CONTROL
in SPL: this requires the introduction of a new family of
configuration options to decouple SPL_OF_CONTROL and SPL_OF_PLATDATA
from TPL.
Consequently, Makefile.spl needs to be adjusted to test for these
configuration items through the $(SPL_TPL_) macro instead of
hard-coding the SPL variant.
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'dts/Kconfig')
| -rw-r--r-- | dts/Kconfig | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/dts/Kconfig b/dts/Kconfig index 1bc9656fae..b4b7ddc144 100644 --- a/dts/Kconfig +++ b/dts/Kconfig @@ -32,6 +32,14 @@ config SPL_OF_CONTROL which is not enough to support device tree. Enable this option to allow such boards to be supported by U-Boot SPL. +config TPL_OF_CONTROL + bool "Enable run-time configuration via Device Tree in TPL" + depends on TPL && OF_CONTROL + help + Some boards use device tree in U-Boot but only have 4KB of SRAM + which is not enough to support device tree. Enable this option to + allow such boards to be supported by U-Boot TPL. + config OF_LIVE bool "Enable use of a live tree" depends on OF_CONTROL @@ -136,4 +144,25 @@ config SPL_OF_PLATDATA declarations for each node. See README.platdata for more information. +config TPL_OF_PLATDATA + bool "Generate platform data for use in TPL" + depends on TPL_OF_CONTROL + help + For very constrained SPL environments the overhead of decoding + device tree nodes and converting their contents into platform data + is too large. This overhead includes libfdt code as well as the + device tree contents itself. The latter is fairly compact, but the + former can add 3KB or more to a Thumb 2 Image. + + This option enables generation of platform data from the device + tree as C code. This code creates devices using U_BOOT_DEVICE() + declarations. The benefit is that it allows driver code to access + the platform data directly in C structures, avoidin the libfdt + overhead. + + This option works by generating C structure declarations for each + compatible string, then adding platform data and U_BOOT_DEVICE + declarations for each node. See README.platdata for more + information. + endmenu |