X-Git-Url: http://git.ipfire.org/?p=people%2Fms%2Fu-boot.git;a=blobdiff_plain;f=dts%2FKconfig;fp=dts%2FKconfig;h=b4b7ddc1444a0b0b16e275fa0365322f5c05b1c0;hp=1bc9656faee6565563bac204a29e6efac2320ac1;hb=f291ce1298f078175bbe3c2e600d03cae173403f;hpb=7c819e7f2258be88cd48521ae796421ed2303fde

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