Hello,
I am using the latest image, Debian 8.4, for my Beaglebone Black and want to configure SPI1 as D0 output.
with universal-io overlay, I was able to get SPI1 working but D0 is always input (MISO)
I have then disabled universal-io and used BB-SPI1-01-00A0.dts , this forms spidev2.0 under /dev but SPI pins do not toggle 
is it possible to use SPI1 D0 as output (MOSI) with Debian 8.4 image?
thanks
rifo