On 23 June 2015 at 15:38, Simon Glass sjg@chromium.org wrote:
This tool allows us to extract subsets of a device tree file. It is used by the SPL vuild, which needs to cut down the device tree size for use in limited memory.
This tool was originally written for libfdt but it has not been accepted upstream, so for now, include it in U-Boot. Several utilfdt library functions been included inline here.
If fdtgrep is eventually accepted in libfdt then we can bring that version of libfdt in here, and drop fdtgrep (requiring that fdtgrep is provided by the user).
If it is not accepted then another approach would be to write a special tool for chopping down device tree files for SPL. While it would use the same libfdt support, it would be less code than fdtgrep.c because it would not have general-purpose functions.
Another approach (which was used with v1 of this series) is to sprinkler all the device tree files with #ifdef. I don't like that idea.
Signed-off-by: Simon Glass sjg@chromium.org
Changes in v3: None Changes in v2:
- Add new patch with fdtgrep tool
tools/Makefile | 6 +- tools/fdtgrep.c | 1234 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 1239 insertions(+), 1 deletion(-) create mode 100644 tools/fdtgrep.c
Applied to u-boot-dm.