Embedded Linux Conference + Android Builders Summit

After having been largely static since its original integration the SPI subsystem has recently entered a period of more active development - new system designs, greater performance requirements and advances within the kernel as a whole have been placing increasing demands on the subsystem. This talk will give an overview of the status of the subsystem, the problems it and its users face and how they are being dealt with to help keep the hardware fully occupied under load while minimising delays, CPU utilisation and duplication of development effort.