1SPI Chip Select behavior: 2 3With the Blackfin on-chip SPI peripheral, there is some logic tied to the CPHA 4bit whether the Slave Select Line is controlled by hardware (CPHA=0) or 5controlled by software (CPHA=1). However, the Linux SPI bus driver assumes that 6the Slave Select is always under software control and being asserted during 7the entire SPI transfer. - And not just bits_per_word duration. 8 9In most cases you can utilize SPI MODE_3 instead of MODE_0 to work-around this 10behavior. If your SPI slave device in question requires SPI MODE_0 or MODE_2 11timing, you can utilize the GPIO controlled SPI Slave Select option instead. 12 13You can even use the same pin whose peripheral role is a SSEL, 14but use it as a GPIO instead. 15