[U-Boot] [PATCH 14/29] fdt: Add an option to disable device tree in SPL

[Simon Glass]

Some boards cannot support device tree due to lack of memory. Add an option
to allow these boards to continue to work (and even use driver model).
This is a 'negative' option since most boards are expected to support device
tree in SPL.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 dts/Kconfig | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/dts/Kconfig b/dts/Kconfig
index ca5bd6f..957f5c7 100644
--- a/dts/Kconfig
+++ b/dts/Kconfig
@@ -1,9 +1,6 @@
 #
 # Device Tree Control
 #
-# TODO:
-#   This feature is not currently supported for SPL,
-#    but this restriction should be removed in the future.
 
 config SUPPORT_OF_CONTROL
 	bool
@@ -17,6 +14,14 @@ config OF_CONTROL
 	  This feature provides for run-time configuration of U-Boot
 	  via a flattened device tree.
 
+config SPL_DISABLE_OF_CONTROL
+	bool "Disable run-time configuration via Device Tree in SPL"
+	depends on 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 SPL.
+
 choice
 	prompt "Provider of DTB for DT control"
 	depends on OF_CONTROL
-- 
2.2.0.rc0.207.ga3a616c