Hello, the Debian kernel does not work at all with the SPI interface of the my Hummingboard, see here
http://forum.solid-run.com/viewtopic.php?f=10&t=3406&p=22586#p22586 I am not a dtb expert, but is in the debian dtb spi support included? There is at least some indication.... spi0 = "/soc/aips-bus@02000000/spba-bus@02000000/ecspi@02008000"; spi1 = "/soc/aips-bus@02000000/spba-bus@02000000/ecspi@0200c000"; spi2 = "/soc/aips-bus@02000000/spba-bus@02000000/ecspi@02010000"; spi3 = "/soc/aips-bus@02000000/spba-bus@02000000/ecspi@02014000"; Somebody claims that the Fedora kernel supports SPI flawless (with the proper dtb file). Any hint is welcome... Thanks Rainer -- Rainer Dorsch http://bokomoko.de/