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ADF4350/ADF4350 Linux driver problem

Question asked by soniq on Mar 3, 2017
Latest reply on Mar 3, 2017 by mhennerich

Hi all,

I am trying to use the adf4350 Linux kernel driver on a my Beaglebone embedded board.

The driver is compiled correctly (also because it's already included in the kernel source), but nothing is working as reported here in the Driver Testing section from the ADF4350 IIO Wideband Synthesizer Linux Driver page.


Once the driver is loaded, no directory is being created in /sys/bus/iio directory, and nothing is also reported from dmesg output.


I also tried to compile the device-tree file posted in the section Devicetree binding modifyng it as follows:



/ {
        lo_pll0_rx_adf4351: adf4351-rx-lpc@4
                compatible = "adi,adf4351";
                reg = <4>;
                spi-max-frequency = <10000000>;
                /* clocks = <&clk0_ad9523 9>;*/
                clock-names = "clkin";
                adi,channel-spacing = <10000>;
                adi,power-up-frequency = <2400000000>;
                adi,charge-pump-current = <2500>;
                adi,output-power = <3>;


commenting the line 8 due to the error


ERROR (phandle_references): Reference to non-existent node or label "clk0_ad9523"
Warning: Input tree has errors, output forced


however with the modifications applied, now the warnings are:

Warning (reg_format): "reg" property in /adf4351-rx-lpc@4 has invalid length (4 bytes) (#address-cells == 2, #size-cells == 1)
Warning (avoid_default_addr_size): Relying on default #address-cells value for /adf4351-rx-lpc@4
Warning (avoid_default_addr_size): Relying on default #size-cells value for /adf4351-rx-lpc@4


and if I execute


echo "adf4530"  > /sys/devices/platform/bone_capemgr/slots


I obtain the error


bash: echo: write error: No such file or directory


Is the devicetree file mandatory to work with the driver ?

What could be the cause I don't see the /sys/bus/iio/iio:device0  once the driver is loaded ?

Thank you.