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Firmware API core features¶

The firmware API has a rich set of core features available. This section documents these features.

  • Firmware search paths
  • Built-in firmware
  • Firmware cache
  • Direct filesystem lookup
    • Firmware and initramfs
  • Fallback mechanisms
    • Justifying the firmware fallback mechanism
    • Types of fallback mechanisms
    • Firmware sysfs loading facility
      • firmware_fallback_sysfs
    • Firmware kobject uevent fallback mechanism
    • Firmware custom fallback mechanism
    • Firmware fallback timeout
    • EFI embedded firmware fallback mechanism
      • Example how to check for and extract embedded firmware
  • Firmware lookup order
  • Firmware Guidelines

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