title: SPI Reset on Raspberry Pi after GPIO usage
body: <p>I found out when I used GPIO Pins which are also SPI Pins (GPIO8,9,10,11) and clean them up. I can not reuse this Pins for an SPI connection. </p>
  
  <p>I have to restart the Raspberry Pi first to use SPI again. </p>
  
  <p>Do you have an idea how I can reset this Pins for SPI usage without restart?</p>
  
  <p>Regards</p>