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authorPhilipp Tomsich <philipp.tomsich@theobroma-systems.com>2017-06-29 11:11:21 +0200
committerPhilipp Tomsich <philipp.tomsich@theobroma-systems.com>2017-08-13 17:12:20 +0200
commitf291ce1298f078175bbe3c2e600d03cae173403f (patch)
tree0e710ab791df111ce2393118c79e12a02adf14da /dts
parent7c819e7f2258be88cd48521ae796421ed2303fde (diff)
downloadu-boot-f291ce1298f078175bbe3c2e600d03cae173403f.tar.gz
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')
-rw-r--r--dts/Kconfig29
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.
+
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