My problem is propably dumb as it is similar to older posts, such as :
I am still struggling to use a 20 MHz reference (it can be any reference) on the SMA port REF_CLK on the fmcomms3 board.
I followed Lars 's indications, recompiled the kernel and modify the clock-frequency attribute in the devicetree.
The problems appear when I use IIO oscilloscope application, the board seems to start fine (i.e. no SPI timeout on console when changing LO), however when I try to capture data on a plot, I can't select any channels, i.e. the list "cf-ad9361-lpc" does not appear and therefore voltage channels are not selectable.
I do think there is a problem with the driver, and I probably made a stupid mistake building the kernel Building the 2014_R2 release Linux kernel and devicetrees from source [Analog Devices Wiki]
Some indications on my setup :
- i "checkouted" the 2014_R2 branch
- my vivado version is 2014.2, 32 bit version
Thanks in advance !
PS : I used the SD image out off the box with a 40 MHz external reference and it worked perfectly fine, with the new compiled image, I can't even use that reference too.