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Document iomem=relaxed requirement for MMIO access#18

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MarsDoge merged 2 commits intomasterfrom
codex/document-iomem-relaxed-requirement
Apr 1, 2026
Merged

Document iomem=relaxed requirement for MMIO access#18
MarsDoge merged 2 commits intomasterfrom
codex/document-iomem-relaxed-requirement

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@MarsDoge MarsDoge commented Apr 1, 2026

Summary

  • document that some MMIO/register commands may require iomem=relaxed
  • add a runtime hint when the shared physical mapping helper fails its mmap
  • leave gpio unchanged as requested

Testing

  • not run (documentation and error-message-only change)

@MarsDoge MarsDoge merged commit e6d4976 into master Apr 1, 2026
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