• Martin Sperl's avatar
    spi: add loopback test driver to allow for spi_master regression tests · 84e0c4e5
    Martin Sperl authored
    This driver is submitting lots of distinct spi-messages messages
    with all kinds of alignments and length pattern.
    Also distinct kinds of transfer pattern tests are implemented
    (rx, tx, rx/tx, tx+tx, tx+rx,...)
    
    Right now on a raspberry pi 752 distinct spi_messages are executed
    in 13 different scenarios.
    
    Configuration of additional test-pattern is easy, so that when
    new bugs in drivers get detected the relevant transfer pattern can
    also get added to the test framework, so that such situations are
    detected in other drivers as well.
    
    The idea behind this driver is to make it possible to also detect
    regressions in spi_master implementations when changes occur.
    Potentially these tests could get executed automatically in a
    test-server-farm.
    Signed-off-by: default avatarMartin Sperl <kernel@martin.sperl.org>
    Signed-off-by: default avatarMark Brown <broonie@kernel.org>
    84e0c4e5
spi-test.h 5.27 KB