Re: TI-am335x-adc

[Jonathan Cameron <jic23@kernel.org>]

On 17/03/15 10:40, Isak Lichtenstein wrote:
> 
> Hi everybody,
> 
> I've started using the TI-am335x-adc driver in continuous mode on our custom board with AM3359 and yocto-linux-standard 3.17 and get a weird behavior when testing it using generic_buffer.c
> 
> Every now and then channel 0 seems to contain the value of channel 1, see the attached output of the following command: ./genericBuffer -n TI-am335x-adc -l 128 -c 100 ( I've added tabs to make it more readable).
> 
> 
> Is this a driver bug ( maybe already patched after 3.17 ), or is my board not properly configured?
> 
> I'm not using the TSC and my device tree is configured as follows:
> 
> #include "am33xx.dtsi"
> 
> &tscadc {
>             status = "okay";
>             /*
>             tsc {
>                         ti,wires = <4>;
>                         ti,x-plate-resistance = <200>;
>                         ti,coordinate-readouts = <5>;
>                         ti,wire-config = <0x00 0x11 0x22 0x33>;
>             };
>             */
> 
>             adc {
>                         ti,adc-channels = <0 1 2 3 4 5 6 7>;
>             };
> };
> 
> 
> Thanks in advance for your advice.
> 
> Best regards
> 
> Isak Lichtenstein
> 
Zubair, any thought on this?
(or anyone else for that matter!)