Hi there,
El 01/07/14 18:47, bruce bushby escribió:
Hi
I wanted to ask if anybody has tried to build spi-sun7.c for mainline
kernels?
I followed this excellent guide:
http://will-tm.com/spi-on-the-cubieboard2/
...but the compile fails with
drivers/spi/spi-sun7i.c:30:22: fatal error: mach/dma.h: No such file or
directory
#include <mach/dma.h>
^
compilation terminated.
make[3]: *** [drivers/spi/spi-sun7i.o] Error 1
make[3]: *** Waiting for unfinished jobs....
SPI on mainline is already supported on A20 via the SPI_SUN4I kconfig
entry. It only supports PIO transfers for the moment.
I also noticed the Fedora 20 images doesn't support SPI for A20:
https://github.com/jwrdegoede/sunxi-fedora-scripts/blob/master/README
* SPI (as module, not supported on A20)
This uses the linux-sunxi 3.4 kernel. I believe it has also recently
gained SPI support on A20.
So now I'm a little worried as my entire project is built around 4 SPI
devices on an A20-SOM :)
Any secret plans for full DMA + SPI in the works?
As part of my work on DMA, I have worked on enabling DMA transfers on
SPI, so it should be supported on mainline in the nearby future. I'll be
sending a fresh second round of patches you can try really soon, so stay
tuned.
Cheers,
Emilio
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