Hi. Kernel version : 4.11.7-sun8i   My trouble is that clk is weird in using spidev.  This is a oscilograph when i send a command with spi. First line is CLK and second line is CS0.     My slave chip can not receive commands. and I think it due to this weird CLK.  CS seems affect CLK.   I just want to use spi with CS keeping active-low. But, following code setting mode of spi occured an error.  "invalid argument exception"   m