upxtreme spi_dev0.1 speed problem

upxtreme spi dev0.0 supports 12Mhz, but spidev0.1 only supports below 4Mhz.
The installed version of upxtreme ubuntu is 18.04 and the kernel is


  • Wilbert
    Wilbert New Member Posts: 32

    Hi Jackey,

    Can you provide your test method?
    Clean OS? Or something updated?
    How did you determine the frequency? Have you confirm with oscilloscope or logic analyzer?Or connect to device?
    Normally, the SPI frequency depends on the Clock. The difference between spi dev0.0 and spi dev0.1 is the Chip select pin.

    I have tried to replicate this issue here, but all I see here are normal output, and the frequency will not be different due to different chip select pin.