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This is a simple utility used to test SPI functionality. It could stand growing options to support using other test data patterns; this initial version only issues full duplex transfers, which rules out 3WIRE or Microwire links. Signed-off-by: Anton Vorontsov <[email protected]> Signed-off-by: David Brownell <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>