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    • Simon Glass's avatar
      fdt: Add fdtgrep tool · 1043d0a0
      Simon Glass authored
      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: default avatarSimon Glass <sjg@chromium.org>