dm: Add an option to enable the of-platdata feature

[u-boot] / dts / Kconfig

diff --git a/dts/Kconfig b/dts/Kconfig
index df068a1f930e1a069981cd46ee890e6175fa4fb8..4b7d8b15cc04d7f3a81ab7edf50268901ee4cf8c 100644 (file)
--- a/dts/Kconfig
+++ b/dts/Kconfig
@@ -59,6 +59,17 @@ config DEFAULT_DEVICE_TREE
          It can be overridden from the command line:
          $ make DEVICE_TREE=<device-tree-name>
 
+config OF_LIST
+       string "List of device tree files to include for DT control"
+       depends on SPL_LOAD_FIT
+       default DEFAULT_DEVICE_TREE
+       help
+         This option specifies a list of device tree files to use for DT
+         control. These will be packaged into a FIT. At run-time, SPL will
+         select the correct DT to use by examining the hardware (e.g.
+         reading a board ID value). This is a list of device tree files
+         (without the directory or .dtb suffix) separated by <space>.
+
 config OF_SPL_REMOVE_PROPS
        string "List of device tree properties to drop for SPL"
        depends on SPL_OF_CONTROL
@@ -74,4 +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