summaryrefslogtreecommitdiff
path: root/dts
diff options
context:
space:
mode:
authorSimon Glass <sjg@chromium.org>2016-07-04 11:58:06 -0600
committerSimon Glass <sjg@chromium.org>2016-07-14 20:40:24 -0600
commit2789ddb9d5bc6acd1f7a2822fed08cd7cf2a965e (patch)
treee3381caaaa2c89eaa6b3ba425a15c49fd5833d78 /dts
parent7a53a54073e663d79ea0e08818e98f14fde5685a (diff)
downloadu-boot-2789ddb9d5bc6acd1f7a2822fed08cd7cf2a965e.tar.gz
dm: Add an option to enable the of-platdata feature
Add a Kconfig option to enable this feature. Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'dts')
-rw-r--r--dts/Kconfig21
1 files changed, 21 insertions, 0 deletions
diff --git a/dts/Kconfig b/dts/Kconfig
index c56c1299c0..4b7d8b15cc 100644
--- a/dts/Kconfig
+++ b/dts/Kconfig
@@ -85,4 +85,25 @@ config OF_SPL_REMOVE_PROPS
can be discarded. This option defines the list of properties to
discard.
+config SPL_OF_PLATDATA
+ bool "Generate platform data for use in SPL"
+ depends on SPL_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