spi-bcm2835
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msperl
SPI master driver with DMA support for the Raspberry Pi
DMA
I have started to look at spi-bcm2835 and DMA. My FBTFT drivers are now included in raspberrypi/linux, but I need a DMA SPI driver there as well, so I can...
Way forward
I'm picking up from https://github.com/notro/rpi-firmware/issues/18 > You are right: for all practical purposes it is not possible to run than 32k (0xffff seems stupid) and would require multiple adjacent pages...
implement LoSSI/9-bit mode in spi-bcm2835 (its basic form implemented in spi-bcm2708) so that it may become a viable option for the foundation kernel.
instead of having the bouncing between interrupt and worker thread handle everything inside the interrupt handler to reduce scheduling overheads