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TDA4VH-Q1: IIO: Unable to refill buffer: Connection timed out (110)

igmogo_ku
Prodigy 35 points
Part Number: TDA4VH-Q1

Tool/software:

Dear TI,

I am trying to read data from the TI-am335x-adc by using libiio but I always get a timeout error (-110). The same is true if i use the program iio_readdev.

The device is shown in my sysfs and I can read some data there:

cat /sys/bus/iio/devices/iio:device0/in_voltage4_raw
1397

But when using libiio in c or the tool iio_readdev, I get this error:

iio_readdev --samples 1 iio:device0 voltage4
WARNING: High-speed mode not enabled
Unable to refill buffer: Connection timed out (110)

After trying that command, the interrupts for the device get increased:

cat /proc/interrupts

...

264:      19337          0          0          0     GICv3 892 Level     TI-am335x-adc.0.auto

...

The device tree is configured like this:

tscadc0: tscadc@40200000 {
      compatible = "ti,am3359-tscadc";
      reg = <0x00 0x40200000 0x00 0x1000>;
      interrupts = <GIC_SPI 860 IRQ_TYPE_LEVEL_HIGH>;
      power-domains = <&k3_pds 0 TI_SCI_PD_EXCLUSIVE>;
      clocks = <&k3_clks 0 0>;
      assigned-clocks = <&k3_clks 0 2>;
      assigned-clock-rates = <60000000>;
      clock-names = "fck";
      dmas = <&main_udmap 0x7400>,
         <&main_udmap 0x7401>;
      dma-names = "fifo0", "fifo1";
      status = "disabled";

      adc {
         #io-channel-cells = <1>;
         compatible = "ti,am3359-adc";
      };
   };

&tscadc0 {

   pinctrl-0 = <&mcu_adc0_pins_default>;
   pinctrl-names = "default";
   status = "okay";
   adc {
      ti,adc-channels = <0 1 2 3 4 5 6 7>;
   };
};

What could I do next to figure out the solution for this problem?

Thanks and regards

igmogo